You should. 3 misfire at idle on cylinder 4, goes away above 1300 roms 3 Answers. Misfire Cylinder #4. Installed new GM spark plugs and wires. If it is, get an OBDII scanner. A test with a vacuum gauge could be a good precursor to running a. Truck starts and has misfire on cylinder 4. И при этом у них и совсем другая логика обнаружения: Misfire: The ECM uses the crankshaft position sensor and camshaft position sensor to monitor changes in the crankshaft rotation for each cylinder. Just wanted to share my fuel system/injection system problems and the solution. I changed the plugs, checked the wires, coil pack, injectors, and signal from PCM. In the 4. Cylinder number 1 misfire after lifter replacement at Potters City Garage in Minden Louisiana. Old plug was damp with fuel. P0306: Cylinder #6 Misfire. Truck starts and has misfire on cylinder 4. If the misfire moves your question is answe9. Check your spark plugs and spark plug wires. The Vortec 4800 LR4 (VIN code "V") is a Generation III small block V8 truck engine. Most of the time around town is alright. Search this website. This will confirm if the misfire or rough idle is due to burned or severely worn cylinder head valves or Piston Rings. Jul 10, 2016 · continuous misfire on cyl #4 Continuous misfire on cyl #4 2007 Chevrolet Silverado 1500 Asked by Tom_Snds in Olden, TX on July 10, 2016 Have replaced COP, spark plug, and plug wire. try swapping the injectors and or coils wires to. Random/Multiple Cylinder Misfire Detected. P0304: Cylinder #4 Misfire. 2006 Chevy silverado 5. I’ve seen this on Chevys a few times. Oct 02, 2010 • 2001 Chevrolet Silverado. The obd2 code showed a misfire in the #4 cylinder (P0304). Пропуски зажигания в 1-м цилиндре. 3 with 77k on it. Operation Section. I have a 08 Silverado 4. 3/4l80e/turbo Adding shields to keep engine cooler. So we replaced plugs, wires and coils on all 8 Cyl. 1994 S-10 PROJECT TRUCK 283 TBI V8. 2002 Chevy Silverado 4. Финал третьего сезона одного из самых популярных российских сериалов «Мажор 1-4 сезон» шокировал поклонников. 0 6. When this happens, the fuel injectors will spray fuel in a jet instead of a fine atomized mist and/or no fuel at all. The Chevrolet Colorado, and its counterpart, the GMC Canyon, are series of compact and later mid-sized pickup trucks marketed by American automaker General Motors. 3L, 6. There are two easy ways to diagnose a mechanical misfire: A Compression Test and an Engine Idle Manifold Vacuum Test. Random Cylinder Engine Misfire Dodge, Chrysler. misfire can be many reasons even a leaking EGR main valve. Really bad gas mileage. 2000 silverado 5. It worked for about 30 minutes and started to run really bad. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114. Cylinder 4 Fuel System Failure Turbo Control System (Negative Deviation) Engine Speed Error #1 Misfire #3 Misfire #5 Misfire #2 Misfire #6 Misfire #4 Misfire Remarks J08E engine only. Cylinder 7 misfire code and PO449 code. Too lean means too much air and not enough fuel; according to the power control module (PCM) calculation. Replaced all plugs, issue still present. It eventually set off the check engine light with cylinder 1 misfire and random cylinder misfire. The engine idles a little rough and the cel is on. The basic engine for a 2023 Silverado 1500 half-ton pickup is a turbocharged 2. Steady compression readings (10% each) and a minimum of 120 PSI per cylinder, at least 17 inches steady vacuum are needed for complete and smooth combustion. I've replaced the spark plugs, wires. These fuel injectors can get dirty (internally) and/or clogged. If the problem persists more tests need to be done to diagnose the problem, see "Possible Causes". Cylinders 2 and 7 misfire. P0308: Cylinder #8 Misfire. 3 Answers Guru95MJ5S answered about a year ago. ” In either scenario, the code indicates your car’s onboard computer perceives an engine misfire on multiple cylinders. 3L: Will not go into closed loop - ScannerDanner Forum - SCANNERDANNER. 2009 Silverado 5. 18,916 Posts. I have a 08 Silverado 4. 2004 Silverado with 5. To learn more about firing order, read our explanation here. Apr 10, 2021 · 2003 silverado 6. To learn more about firing order, read our explanation here. vj Fiction Writing. Connect a fuel pressure gauge to the fuel rail and start the engine. The P0303 code means that the cylinder 3 is misfiring or is randomly misfiring. 6 nov. The misfire codes (other than a P0300) identify the engine cylinder that's missing or dead. Subject vehicle came in with a cylinder 5 misfire. Melling Oil Pump M365-395S. 135,000 miles. 2007 Chevy Silverado Classic 1500 4. Got a new one made from aluminum with cap and sensor for $34 on eBay, works great. 2015-2016 Chevrolet Silverado, Suburban, Tahoe. Cylinder 6 misfire. SKU # 413363. 3 flex. Chevy Silverado 1500 LT 4x4, extended 4 door cab. new spark plugs , using OEM type plugs and gapped to factory spec. Code P0304 indicates that the powertrain control module (PCM), has counted enough misfire events on cylinder 4 to store the misfire code for that cylinder. The obd2 code showed a misfire in the #4 cylinder (P0304). has p0305 and p0200. 3 misfire at idle on cylinder 4, goes away above 1300 roms 3 Answers Just curious if anyone has ran into this and had a fix, all the lifters have been changed, new vlom, oil pressure sensor, spark plugs and wires. idles fine but when driving or rub it at 2000 rpm or higher the checking engine starts to flush. Oct 02, 2010 • 2001 Chevrolet Silverado. 8 cylinder # 8 misfire - 2001 Pontiac Grand Prix. I have a 08 Silverado 4. 2002 Chevrolet Silverado 4. A vehicle usually has 4 to 8 engine cylinders depending on its power needs. 3L Cyl 8 Misfire Fuel in oil would be rich on both banks. '02 TB EXT 4. Power Seat Control Module Replacement. Smell of raw gasoline coming out of the tail-pipe. I changed the plugs, checked the wires, - Answered by a . :iamwithstupid: It must be a ground wire or a severed wire in the harness or at the fuse block. The fuel pump has good preasure. moved coil from cylinder #4 to cylinder #1 still had misfire on cylinder #4 as per s read more. 3L OBD-II code P0306 is generic cylinder 6 misfire detected. 1 Answer These sensors are quiet a problem. Out the oil fill means rings or hole in piston. The cylinder balance test should be done by unplugging the electrical connector of the fuel injector or the COP Coil. Really bad gas mileage. 3 with 77k on it. 3 liter misfires on #1 when the engine is idling. Truck has over 200k miles; owner had already changed plugs, wires, and ignition coil, but still had the. I had this problem intermittently for the past few months. Federal government websites often end in. /4,8 кВт. Still had misfire. 3 L Missing and Rough Idle Intermittently. Manifold warping may be the cause as well. An important thing to understand when finding the location of Cylinder4is that it’s going to be the 4’th cylinderin the firing order of the vehicle, and not the 4’th cylinderthat you might see when looking at the engine. Besides plug, wire, coil, and injector what could be my problem. Once its above 1300 runs misfire goes away. Checked the compression in the #2 (130) and 4 (122) cylinders and checked the pcv and air filter. Check Engine Light with a P0300 due to 2 - 4 cylinders misfiring on . Most of the time around town is alright. xn lw. Switch coil pack see if it moves. 2006 Forester XT -Sold- Blu-Blur. gov means it’s official. cold misfire. In the 4. New head gaskets as well so those are fine, does have great compression. Was loosening fuel PSI when it starts idling rough from 60psi to 44. Spark plugs, and if your issue still persists, then replace the coil pack (s) for the troubled cylinder of all of them if you can afford it. (304 caused the 151) A lean condition can make a misfire usually a P0300 (random mis) You should pull you #4 injector and swap it to #2, (i would go buy some injector o-rings form your local parts store first so you dont get standed witha fuel leak) do the compression test first. I have a 2007 chevy 1500hd 5. An important thing to understand when finding the location of Cylinder 4 is that it’s going to be the 4 ’th cylinder in the firing order of the vehicle, and not the 4 ’th cylinder that. The check engine light came on throwing code p0305 which is a misfire in cylinder 5. I have an 2002 Suburban with the vortec 5. 2009 Silverado 5. I took it to Auto Zone. SELECT STORE. Having trouble with running rough and misfire. Truck has over 200k miles; owner had already changed plugs, wires, and ignition coil, but still had the. i have not ohm tested injectors. Probable cause is faulty spark plug, wire or core. To learn more about firing order, read our explanation here. Installed new GM spark plugs and wires. Definition Error Code P0304 is a common error code which signifies a misfire issue with the engine’s cylinder, particularly the cylinder #4. Engine Cylinder 3 is Misfiring. Check if this fits your Chevrolet Silverado 1500. Code P0304 indicates that the powertrain control module (PCM), has counted enough misfire events on cylinder 4 to store the misfire code for that cylinder. At 1000 to 2000 rams Cylinder 4 becomes worst then 6 all the while 2 and 8 might read 1 or 2. I reassembled and am still getting the same problem. The OEM are plastic and the shaft starts to wobble as they wear and age and produce misfires. I took it to Auto Zone. It's got a code popping up for cylinder 7 misfire and the service stabilitrak comes on about every two miles going down the road and turns back off. Cyl #4 Misfire causes transmission line pressure to max out. Join Date: Apr 2010. It eventually set off the check engine light with cylinder 1 misfire and random cylinder misfire. 7-liter 4-cylinder unit developing 310 horsepower and 420 lb-ft of torque. cg Fiction Writing. After a couple weeks I noticed that at idle the engine would stumble and my rpms would drop slightly. gov or. Basics Causes Of A. I created this video with the YouTube Video Editor (http://www. 3L, 6. It’ll likely show a P030X trouble code, where the X represents that cylinder number in the firing order. rough idl. Smell of raw gasoline coming out of the tail-pipe. Nov 18, 2011 · A misfire can make a lean code. Check your spark plugs and spark plug wires. It is the smallest of the Generation III Vortec truck engines and was the replacement for the 5. P0302 Cylinder #2 Misfire. SELECT STORE. Obviously since you've already been getting a misfire code on #1, this may be moot. P0102 - Mass Air Flow Sensor Circuit Low Frequency. 3L, 6. There is a Factory Service Bulletins for All 2000. When I finally found the table for idle in gear I realized how obvious it was. The check engine light came on. In this video,. A test with a vacuum gauge could be a good precursor to running a compression test. Operation Section. Manifold warping may be the cause as well. Steady compression readings (10% each) and a minimum of 120 PSI per cylinder, at least 17 inches steady vacuum are needed for complete and smooth combustion. I tried swapping wires and it still shows cylinder 4. tapping sound and misfire were first things noticed. 3L: Will not go into closed loop - ScannerDanner Forum - SCANNERDANNER. Again #4 eliminating coil pack. to/2uxPYP8Troubleshooting Code P0304 Misfire Detected Cylinder #4 Chevy T. The check engine light came on. /4,8 кВт. 3 6. Cylinder 4 Fuel System Failure Turbo Control System (Negative Deviation) Engine Speed Error #1 Misfire #3 Misfire #5 Misfire #2 Misfire #6 Misfire #4 Misfire Remarks J08E engine only. Swapped the injectors, swapped the coils, swapped the plug wires with cylinders that had no misfires and 7 and 8 still had the same misfires. P0302 Cylinder #2 Misfire. shuddering upon acceler. To learn more about firing order, read our explanation here. Truck has over 200k miles; owner had already changed plugs, wires, and ignition coil, but still had the. P0307: Cylinder #7 Misfire. The engine idles a little rough and the cel is on. 3 misfire at idle on cylinder 4, goes away above 1300 roms Asked by Guru95MJ5S Jan 19, 2021 at 01:18 AM about the 2009 Chevrolet Silverado 1500 LT Crew. A P0302 code, for example, would tell you cylinder number two is misfiring. to/2IhYzYbBuy Chevron Techron Here: https://amzn. The check engine light came on throwing code p0305 which is a misfire in cylinder 5. 855 and. Subject vehicle came in with a cylinder 5 misfire. Because, GM V8 engines are very prone, to a rough idle and engine misfire when cold. replaced lifters. Cylinders 2 and 7 misfire. Aug 27, 2018 · Chevy Silverado P0304 Definition. When this happens, the fuel injectors will spray fuel in a jet instead of a fine atomized mist and/or no fuel at all. If it is too low or too high, you need to inspect the components of the fuel system. I’ve seen this on Chevys a few times. 2009 Silverado 5. When i put it on highway, it will surge like its cutting off and then pick right back up and be fine. Right rise cylinder. I've give it complete tune up plugs,wires,distributor, distributor cap,rotor button, changed maf sensor ,maintains 50psi fuel pressure while driving ,checked compression it seemed to be fine also at around 150psi 1 Answer 10 Guru99ZTGF answered 2 years ago How did you resolve your P0304?. 2008 chevrolet silverado 1500 lt 4x4. When this happens, the fuel injectors will spray fuel in a jet instead of a fine atomized mist and/or no fuel at all. After a couple weeks I noticed that at idle the engine would stumble and my rpms would drop slightly. ux; vo. There is a Factory Service Bulletins for All 2000. Sep 08, 2006 Second opinion I have a 2011 odyssey with the 3. misfire can be many reasons even a leaking EGR main valve. 4 oct. P0306 Cylinder #6 Misfire. Spraying carb. Votex - M16 X 2. Helpful 0 ;. Really bad gas mileage. oneday while merging in traffic about about 3800 rpm's it created a cylinder 1 misfire. misfire #7. A P0302 code, for example, would tell you cylinder number two is misfiring. Most of the time around town is alright. The bulletin applies. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114. Definition Error Code P0304 is a common error code which signifies a misfire issue with the engine’s cylinder, particularly the cylinder #4. 19 janv. Misfire on 2- 4 -6-8 cylinders. Aug 27, 2018 · Chevy Silverado P0304 Definition. 8K subscribers Subscribe 4. Powertrain Misfire. 2,492 Posts. Probable cause is faulty spark plug, wire or core. GM had a lot of problems with those lifters, especially in 07 and 08. P0308 is a diagnostic trouble code (DTC) for "Cylinder 8 Misfire Detected". 6 nov. I also changed the head gasket, intake manifold gasket and exhaust manifold gaskets. Engine code is a P0304. Mar 16, 2021 · What causes a misfire in a 2003 Chevy Silverado? Chevrolet code P0300 indicates that one or more cylinders are experiencing misfires. Vacuum Leak Tests. Just curious if anyone has ran into this and had a fix, all the lifters have been changed, new vlom, oil pressure sensor, spark plugs and wires. #6 · Jan 29, 2013. xn lw. Trust me on that one. 3L, 6. Truck starts and has misfire on cylinder 4. 3L 4WD with ~135K miles has recently been throwing a P0306 cylinder 6 misfire, along with a Stablitrak warning. 3 cu in) with a bore and stroke of 96 mm × 83 mm (3. All so these lifters are notorious for collapsing or sticking you must replace them problem solved Share Improve this answer Follow answered Nov 24, 2020 at 6:03 John Shipman 1 Yes, that is what it was. A cylinder 4 misfire is also known as error P0304, meaning that the PCM of the vehicle has detected some problems with this cylinder. 8 L; 293. To learn more about firing order, read our explanation here. 2011 chevy silverado LT 1500 4x4. moved coil from cylinder #4 to cylinder #1 still had misfire on cylinder #4 as per s read more. An important thing to understand when finding the location of Cylinder 4 is that it’s going to be the 4’th cylinder in the firing order of the vehicle, and not the 4’th cylinder that you might see when looking at the engine. 1 Answer These sensors are quiet a problem. Subject vehicle came in with a cylinder 5 misfire. cg Fiction Writing. Subject vehicle came in with a cylinder 5 misfire. I just changed the lifters in it and the oil sending unit and it cleared up for about two weeks Mechanic's Assistant: When was your last oil change? Two days ago Mechanic's Assistant: Are you fixing your Silverado 1500 yourself?. #PIP4568S: Tick Noise And/or Misfires On AFM Cylinders 1 4 6 And/or 7 - (Mar 16, 2016) Subject:Tick Noise And/or Misfires On AFM Cylinders 1 4 6 And/or 7. I show you how. Posts: 75. -Swap the coil from the #4 cylinder to a different one, then check an see if the missfire moved to your new coil location. May 23, 2020 · Replied by John Curtis on topic 2011 Chevy Silverado 5. The vehicle is a 2003 Chevy Silverado 2500hd, 6. to/2IhYzYbBuy Chevron Techron Here: https://amzn. I backed the programmer back of the truck and still getting the same thing. porn asleep
The misfire codes (other than a P0300) identify the engine cylinder that's missing or dead. . 08 silverado 53 misfire cylinder 4
Lack of Power when you accelerate your van, pickup or SUV. 2 For the past 6 months my 2003 Tahoe 5. After a couple weeks I noticed that at idle the engine would stumble and my rpms would drop slightly. 0 air cold crack hesitate idle intermittent internal intake L59 LR4 LM4 LM7 LQ4 LQ9 P0300 #PIP3232A - (03/08/2005) Models:. Free In-Store or Curbside Pick Up. It is a possibility that the P0171 code mite have caused the others. Diagnostic trouble code (DTC) P0305 stands for "Cylinder 5 Misfire Detected. Engine has about 50 miles on a reman from Autozone due to the all too common cyl 6 collapsed lifter. After a couple weeks I noticed that at idle the engine would stumble and my rpms would drop slightly. Out the exhaust means exhaust valve, out the throttle body means intake valve and if is valves will need to remove valve cover and check for bent valve or broken spring or collapsed lifter. A P0300 diagnostic code indicates a random or multiple misfire. po ie. P0304 is a cylinderspecific misfirecode, which means that Cylinder4is misfiring and causing the code. 08 silverado 53 misfire cylinder 4. 6 nov. The Code Are Telling. Lots of possibilities. changed spark plugs, wire,. Replies 28 Views 1K. Four cylinder, horizontally opposed, air cooled, two cycle engine, with solid state magneto or battery ignition. A spark plug terminal with a greenish color means that there might be a problem with the coolant. May 23, 2020 · 2011 Silverado 5. misfire can be many reasons even a leaking EGR main valve. 3 janv. Again #4 eliminating coil pack. P0305 Cylinder #5 Misfire. (PCD stands for Polycrystalline Diamond, and is best for aluminum heads). Aug 18, 2012 · P0301 Cylinder #1 Misfire. Operation Section. I really do not know what else to do. -Pull the fuel rail and switch injectors from one place to another and see if the miss moves just like your coil test. Part # M365-395S. Engine may start, run for a few minutes and stall. 3L, 6. Aug 16, 2010 · This will confirm if the misfire or rough idle is due to burned or severely worn cylinder head valves or Piston Rings. 2009 Silverado 5. Lack of Power when you accelerate your van, pickup or SUV. 0L engines, GM has done away with this type of fuel system and uses 8 separate fuel injectors placed on a fuel rail on the outside of the plenum. So far I've replaced all the plugs, plug wires, new fuel filter, and new coil pack and injector in the number 4 cylinder. 0L is becoming; more common and getting harder to diagnose. cleaner spray around the areas where the manifold bolts to the cylinder head (with a cold running engine) to pinpoint leaking. -Pull the fuel rail and switch injectors from one place to another and see if the miss moves just like your coil test. Jump to the next section to quickly learn the most likely causes of code P0304. Connect a fuel pressure gauge to the fuel rail and start the engine. Once you rev it up to 2500 rpms or more Cylinder 2 becomes the worst and cylinder 4 and 6 start to get a lot better and 8 stays around 1. I'm planning on swapping . Start by checking for intake leaks; intake gaskets are a common cause of multi-cylinder misfiring. 3L: Will not go into closed loop - ScannerDanner Forum - SCANNERDANNER. -Pull the fuel rail and switch injectors from one place to another and see if the miss moves just like your coil test. When this happens, the fuel injectors will spray fuel in a jet instead of a fine atomized mist and/or no fuel at all. Cylinder 5 misfire. no change. hopefully someone can help. Oct 29, 2021 · Diagnostic trouble code (DTC) P0304 stands for “Cylinder 4 Misfire Detected. The P0308 code means that cylinder 8 is misfiring or is randomly misfiring. xn lw. An engine misfire is a common drivability problem that car owners may experience at one point. 2011 chevy silverado LT 1500 4x4. Question type: Maintenance & Repair. Cruising down the highway at 55 mph, transmission in overdrive, the rpm's drop to around. When i put it on highway, it will surge like its cutting off and then pick right back up and be fine. check engine light on,. Cylinder 5 misfire 4. 0L engines, GM has done away with this type of fuel system and uses 8 separate fuel injectors placed on a fuel rail on the outside of the plenum. Random/Multiple Cylinder Misfire Detected. I have had a constant misfire on cyl 3. Question type: Maintenance & Repair. When i put it on highway, it will surge like its cutting off and then pick right back up and be fine. 2011 chevy silverado LT 1500 4x4. Because, GM V8 engines are very prone, to a rough idle and engine misfire when cold. 3L, 6. Random Cylinder Engine Misfire Dodge, Chrysler. Subject vehicle came in with a cylinder 5 misfire. P0308: Cylinder #8 Misfire. These fuel injectors can get dirty (internally) and/or clogged. Powertrain Misfire. Пропуски зажигания в 1-м цилиндре. i have a code of p300 misfire. P0302 Cylinder #2 Misfire. 8l, random misfire on bank 2 at idle and under load. Spraying carb. I changed the plugs, checked the wires, coil pack, injectors, and signal from PCM. Melling Oil Pump M365-395S. Also noticed rocker rattle on left bank. One of Four things is happening here. Misfire on 2- 4 -6-8 cylinders. The check engine light came on. P0304 Explained - Cylinder 4 Misfire (Simple Fix) FIXD 59. 3 misfire at idle on cylinder 4, goes away above 1300 roms 3 Answers. Joined Jul 28, 2016. 4K 456K views 3 years ago FIXD Error Codes The FIXD wireless OBD2 scanner and free app for iPhone and. Check the fuel pressure and compare it to the manufacturer’s specifications. 135K views 4 years ago. Cylinder 12 Contribution/Range Fault. It keeps reaccuring and it's driving me up the wall. It doesn’t apply to vehicles with four-cylinder. After a couple weeks I noticed that at idle the engine would stumble and my rpms would drop slightly. The check engine light came on. Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. 8K subscribers Subscribe 4. The check engine light came on throwing code p0305 which is a misfire in cylinder 5. Still had misfire. 2009 chev Silverado 4. Asked by Tom_Snds in Olden, TX on. Still had misfire. 1 helpful. If this doesn't help, but you have located the cylinder,then do a compression test on the dead hole that you find. idles fine but when driving or rub it at 2000 rpm or higher the checking engine starts to flush. Check the fuel pressure and compare it to the manufacturer’s specifications. 2011 chevy silverado LT 1500 4x4. It idles a little low, but it's done that for a decade. Their is a small leak where the headers connect to the pipes on the driver side next to the fire wall. Subject vehicle came in with a cylinder 5 misfire. I’ve seen this on Chevys a few times. 3 : Misfire. Code P0304 indicates that the powertrain control module (PCM), has counted enough misfire events on cylinder 4 to store the misfire code for that cylinder. I have all the items replaced, and the light came back on and Im getting the same code after replacing everything new. find that intake mixing chamber for #4 is completely dry while all others are wet/damp looking. to/2IhYzYbBuy Chevron Techron Here: https://amzn. Left rise cylinder. #4 has 0 psi. 3 6. 2004 Silverado with 5. Mar 16, 2021 · What would cause a 5. GM had a lot of problems with those lifters, especially in 07 and 08. i have a cylinder misfire on #7 & #8 with codes p0300 & p0200 checked fuel injectors and spark plugs. Engine may start, run for a few minutes and stall. I was going to swap out the plug with a new one to at least eliminate that from the equation. I recently bought a 2008 Silverado 5. Melling Oil Pump M365-395S. misfire #7. Feb 08, 2019 · For the past 6 months my 2003 Tahoe 5. P0303 Cylinder #3 Misfire. May 05, 2018 · When it misfires on it's own however, the feel is completely different, its like a miss on all 4 or 8 cylinders at once. 103,800 miles and will increase some due to still using, 5. This 2014 Silverado came into our shop with a misfire. . notice of compliance telephone interview dwp 2022, mardi gras 2023 mobile al, craigslist duluth pets, asianappleseed, corpus christi tx craigslist cars for sale by owner, impregnate captions, used propane tank for sale, jolinaagibson, jazwares halo series 4, aqa english literature paper 1 2022 leaked, literoctia stories, twinks on top co8rr