P0300 Diagnostic Trouble Code Discussion for June 2016
Multiple Misfire Detected
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| Help Request | Posted | |
| 1998 Audi A4 1.8L Misfire VIN: WAUBB28DXW P0300: Random misfire. Problem is very intermittent.Always sets cyl.#2 misfire code.Rarely will problem happen with scope hooked up to vehicle.Injector pattern never changed except to increase slightly in pulse width when misfiring. Removed valve cover inspected valve springs,NPF. A... |
June 02, 2016 | |
| 2005 Infiniti FX35 3.5L Misfire VIN: JNRAS08W35 P0300: Multiple Misfire Detected. ... First time customer. Customer wanted tune up and minor maintenance. Found oil in tubes of valve cover and replaced valve cover as only supplied by Inf. Vehicle ran good when done, but after road-test had misfire in # 5 cyl. Replaced coil and released vehic... |
June 06, 2016 | |
| 2005 Chrysler Sebring 2.4L Misfire, MIL Lamp on VIN: 1C3EL46J05 P0300: Multiple Cylinder Misfire Detected. vehicle runs ok at idle but misfires on snap throttle , if the a/c is turned on at idle the engine misfires and runs poor. if throttle is tipped in slowly engine runs smooth. had vac leak at broken map sensor o-ring. reapired that and fuel trims are ok. have n... |
June 07, 2016 | |
| 2008 Suzuki Forenza 2.0L MIL Lamp on, false codes VIN: KL5JD56Z18 P0300: misfire random cylinder. this vehicle came into our shop with ck engine and multiple codes stored in obd2. the Suzuki direct access had no codes. we replaced the throttle body first as that code returned immediately after clearing and test drive. no other codes returned during our nex... |
June 07, 2016 | |
| 2008 Dodge Charger SRT8 6.1L Poor Idle Quality, Misfire VIN: 2B3KA73W48 P0300: Random misfire. This vehicle had codes P0300 random misfire and P0308 cylinder #8 misfire. It backfires thru the intake badly under heavy load and when when reved hard at idle.The vehicle misfires when this is happening. But there are no misfires shown on the misfire counter ... |
June 08, 2016 | |
| 2010 Chevrolet Silverado 1500 LS 4.8L Poor Idle Quality, Misfire, MIL Lamp on, misfire cyl 1 4 7 6 VIN: 3GCPCSEA1A P0300: . we have checked all possible failure modes 1 sparks plugs ok 1 cop all ok swaped abba alwasys cyl 1 4 7 6 checked heads checked valves this engine does no have vlom manifold no cut out coils need help we have tried almost everything checked wire harness to p... |
June 09, 2016 | |
| 2005 Chrysler Sebring 2.4L Misfire, MIL Lamp on VIN: 1C3EL46J05 P0300: Multiple Cylinder Misfire Detected. vehicle runs ok at idle but misfires on snap throttle , if the a/c is turned on at idle the engine misfires and runs poor. if throttle is tipped in slowly engine runs smooth. had vac leak at broken map sensor o-ring. reapired that and fuel trims are ok. have n... |
June 09, 2016 | |
| 2010 Chevrolet Silverado 1500 LS 4.8L Poor Idle Quality, Misfire, MIL Lamp on, misfire cyl 1 4 7 6 VIN: 3GCPCSEA1A P0300: . we have checked all possible failure modes 1 sparks plugs ok 1 cop all ok swaped abba alwasys cyl 1 4 7 6 checked heads checked valves this engine does no have vlom manifold no cut out coils need help we have tried almost everything checked wire harness to p... |
June 10, 2016 | |
| 2002 GMC Envoy SLE 4.2L Misfire VIN: 1GKDS13S22 P0300: Multiple Engine Misfire Detected. Seen TSBs one about water intrusion. What do you think about these coils? Epoxy looks melted. One coil looks new, but when I asked about svc history he said, "Uhh... I don't know." Tried to put a sync probe on along with my amp clamp, but this intake d... |
June 10, 2016 | |
| 2004 Saab 9-3 Arc 2.0L Poor Idle Quality, Misfire, MIL Lamp on P0300: random misfire. ... slight rough idle p0300 and p0303 p1623 after swapping coils, spark pugs,injectors the misfire stayed on number 3 cylinder,compression test on all four cylinders 175 psi, had a complete valve job done and still has high misfi... |
June 11, 2016 | |
| 1999 GMC K3500 Sierra SL 7.4L Misfire VIN: 1GDJK34J5X P0300: Multiple Cylinder Misfire Detected. Hi guys and gals. This one has been kicking my butt for 6 months or more. Customer didn't need it and I have been very busy so it sat out back of the shop waiting for it's turn. It is time and I am stumped. Truck came in for coolant over pressuring and misfire... |
June 13, 2016 | |
| 2006 Chevrolet Silverado 2500 HD LT 6.0L Misfire VIN: 1GCHK24U26 P0300: Multiple Engine Misfire Detected. ... as this particular vehicle has been a very difficult beast to fix. Vehicle has a steady misfire/idles rough (Mostly on #2, but now randomly on #1 and #7 than back to #2.). Under acceleration it is misfiring pretty steady. The only code that is repeatable i... |
June 15, 2016 | |
| 1998 Chevrolet Malibu 2.4L Poor Idle Quality, Misfire VIN: 1G1ND52T5W P0300: Multiple Cylinder Misfire Detected. Hey guys I'm about to pull my hair out on this one. Car randomly specially in mornings idles low, misfires all cyll. O2 goes lean between 100–400mv st fuel trim goes up to -30 as if it's running rich than all this happens. Map is about 1.5v 13inch vac. R&r... |
June 17, 2016 | |
| 1998 Volkswagen Beetle 2.0L Poor Idle Quality, Misfire VIN: 3VWBB61C8W P0300: Random misfire. After above work was done, customer drove car for 30 days with no issues then check engine light came on and it started running rough. Brought it back in, and I smoke checked the intake and the only smoke coming out was at the end of the air box. checked for a... |
June 18, 2016 | |
| 2012 Honda Civic LX 1.8L Misfire VIN: 2HGFB2E43C P0300: random cylinder misfire. ... sedately. If run up to near the rev limiter, it will set P0300, P0301, or P0304. P0301 is the most common to return. Power is then extremely limited, and the misfire can be felt at idle. Data will show either cylinder #1 ... |
June 21, 2016 | |
| 2004 Volkswagen Jetta GL 2.0L Misfire, MIL Lamp on VIN: 3VWRA69M94 P0300: Mulitiple misfire. After engine rebuild has misfires. Checked timing marks according to mitchell and identifix they all line up correctly. On lab scope crank sensor and cam sensor seem to be ok. Scoped coil checked fine. Engine vacuum is at 15" late timing. |
June 23, 2016 | |
| 2008 Chevrolet Avalanche LS 5.3L Misfire, MIL Lamp on VIN: 3GNFK123X8 P0300: Random Misfire. Checked all ignition etc. hoping to find an easy out. Not to be. Compression 34-40PSI in #4. Checked Fix Database for any new ideas. I an aware of all the problems with these AFM systems. As suggested by Andy is his post, I cycled the AFM system with the MODIS... |
June 24, 2016 | |
| 2004 Volkswagen Jetta GL 2.0L Misfire, MIL Lamp on VIN: 3VWRA69M94 P0300: Mulitiple misfire. After engine rebuild has misfires. Checked timing marks according to mitchell and identifix they all line up correctly. On lab scope crank sensor and cam sensor seem to be ok. Scoped coil checked fine. Engine vacuum is at 15" late timing. |
June 24, 2016 | |
| 2007 Hyundai Santa Fe SE 3.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 5NMSH13E27 P0300: Multiple Misfire Detected. ... customer said on a grocery store run it started fine,drove good for a minute,then bucked and chugged for a few moments,check engine light started flashing.they turned around and made it home.then it started and ran fine in to shop.cel is on,but not flashin... |
June 27, 2016 | |
| 2007 Jeep Grand Cherokee Laredo 4.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1J8HS48P57 P0300: Multiple Misfire Detected. ... for the last two days now, and my head is gonna explode. it came in with a p0300 random misfire and a p0113 Intake air temp circuit high. Replaced the plugs and coils no change, Feul pressure is good within spec, did an i... |
June 27, 2016 | |
| 2008 Chevrolet Silverado 1500 WT 5.3L Misfire VIN: 3GCEC13068 P0300: generic misfire. have got this absolute nightmare silverado. consistent miss on 5 and 7. checked valve springs-both banks,rockers-both banks, cam lift looks good-both banks. compression is 175. put air down the cylinders-no hiss.swapped around the entire world on this and have... |
June 29, 2016 | |
| 2008 Chevrolet Silverado 1500 WT 5.3L Hesitation, Misfire VIN: 2GCEK19J18 P0300: Misfire detected. Scanned with snap on modis ultra 16.2 Customer states check engine light on, has no power on accel. Getting worse. Replaced all 02 sensor and performed ignition tune up. Roadtest, under heavy load vehicle hesitates, no power, check engine light flashing.. New ... |
June 29, 2016 | |
| 2010 Smart Fortwo Passion 1.0L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: WMEEJ3BA2A P0300: multiple miss fire. ... 2010 Smartcar, This vehicle started running very poor suddenly when customer was driving. Vehicle runs ok 1-2 minutes cold then runs rough, no power and intake backfire. We suspected lean run condition. Code (p0300) in system had us look at fuel pressure, ... |
June 29, 2016 |
