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P0300 Diagnostic Trouble Code Discussion for October 2015

Multiple Misfire Detected *

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Trouble Ticket Help Requests for DTC P0300

	Help Request	Posted
	2001 Audi A6 Quattro 2.8L Misfire VIN: WAUEH64B71 misfire on cly. 4,5,6 and cam code po345. all new plugs, wires, coils. has engine noise from same head. left. very good customer don't want to waste money on repair of this engine if its not going to last. sounds like chain noise. did compression test. all cly...	October 05, 2015
	2001 Audi A6 Quattro 2.8L Misfire VIN: WAUEH64B71 misfire on cly. 4,5,6 and cam code po345. all new plugs, wires, coils. has engine noise from same head. left. very good customer don't want to waste money on repair of this engine if its not going to last. sounds like chain noise. did compression test. all cly...	October 06, 2015
	2004 Isuzu Rodeo S 3.5L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 4S2CK58Y64 P0300: Multiple Cylinder Misfire Detected. Customer complained of lack of power, running rough and surging. Found that the #2 cat was clogged. Replaced the cat and the plugs and did a BG. Since then I have the power back but at at times it still idles rough and surges. For 2 days it ran great with no c...	October 06, 2015
	2005 Dodge Grand Caravan SXT 3.8L Misfire VIN: 2D4GP44L35 P0300: Multiple Cylinder Misfire Detected. Setting code P0300 and P0301. Can see missfires slowly counting on cylinder 1 when idling. Idle feels just slightly rough, otherwise ran good on test drive. Swapped plugs and wires - missfire stayed on cylinder 1. Compression on 1 = 180. running comp. = 50. co...	October 07, 2015
	1997 Jeep Grand Cherokee Laredo 4.0L Hesitation, Misfire, MIL Lamp on VIN: 1J4GZ58S4V P0300: Multiple Cylinder Misfire Detected. Customer came in several times with same complaint. Could not duplicate. Came back in and this time acted up for us. On acceleration on ramp to express way, bogs down, wont go over 45 - 50mph. Flashing Mill light. No miss fire felt at all. Back off pedal, pu...	October 07, 2015
	2007 Ford Escape Limited 3.0L Excessive Emissions, MIL Lamp on, hard start VIN: 1FMCU04157 P0300: Random Misfire Detected. The initial complaint was that it is hard to start. It will turn over 8-10 times and finally fire up, when it does there is a strong fuel smell from the exhaust. Started checking coils and found constant 12V on the red wires as they should be, and then found c...	October 08, 2015
	2002 Toyota Highlander 3.0L Surge, Cuts out, MIL Lamp on VIN: JTEGF21A82 P0300: Multiple Cylinder Misfire Detected. OK here is a problem child. this car runs good until warmed up then it starts missing on #2 on the IDS. it will jerk VIOLENTLY if you back off the throttle it will stop jerking but funny thing is if you try to push through the miss it will also quit then but b...	October 08, 2015
	2004 Chevrolet Monte Carlo SS 3.8L Poor Idle Quality, Surge, Stall VIN: 2G1WZ12144 P0300: Multiple Cylinder Misfire Detected. Vehicle came in code p0300 p0171. Has rough idle and stalls after hot soak. Checked for vacuum leaks had vacuum leak at intake port in hose going to map and fuel pressure regulator. repaired hose no change. Checked fuel pressure while running is 45 psi. replac...	October 09, 2015
	2002 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality, Misfire, MIL Lamp on P0300: Multiple Cylinder Misfire Detected. This has me frazzled at the moment. came in originally for running rough and check engine light fuel trims all were high. SO i smoked it and found leak at intake manifold gaskets. replaced gaskets and still leaks a little . replaced the manifold with updated p...	October 10, 2015
	2009 GMC Acadia SLT 3.6L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GKER23D79 ... This time it had P0300, P0301 plus P0303 and P0305 in history and a rich code for the H02S B1 S1 (MV) 700 plus all the time but got higher as it warmed up.I replaced the Cyl.#1 coil again to ...	October 10, 2015
	2009 GMC Acadia SLT 3.6L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GKER23D79 ... This time it had P0300, P0301 plus P0303 and P0305 in history and a rich code for the H02S B1 S1 (MV) 700 plus all the time but got higher as it warmed up.I replaced the Cyl.#1 coil again to ...	October 11, 2015
	2005 Toyota Camry 2.4L Misfire VIN: 4T1BE32K65 P0300: Multiple Cylinder Misfire Detected. Car came in running poorly with a steady misfire on cylinder 4. Sometimes it would smooth out and run perfect and then all of a sudden start misfiring again. Its a dead miss and sometimes cylinder 3 will miss too but usually just cylinder 4. Compression on all...	October 12, 2015
	2003 Dodge Ram 3500 Van 5.9L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2D7LB31Z53 P0300: Multiple Cylinder Misfire Detected. Customer called last week, can dead on highway, tested for spark, found spark weak, replaced cool and also found cool pin on distributor cap loose, replace cap and rotors. Then customer requested plugs and wires. Van now runs, but is misfiring. I checked and r...	October 13, 2015
	2005 Dodge Ram 1500 ST 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1D7HU18D85 P0300: multiple missfire. ... and CEL light came on and engine runs good at idle but not in reverse and now drive. When vacuum is measured at booster hose it seems fine at idle the c0des were cleared and short test drive showed no misfire so we replaced purge control valve for code p04...	October 13, 2015
	2011 Chevrolet Traverse LTZ 3.6L No Start, Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on ... Traverse 3.6l vin D. Customer stated that the vehicle would idle poorly when hot intermittently. Also when vehicle idles poorly it would also have poor performance. Customer stated no codes in system. I arrived at the repair facility and found 4 codes in h...	October 14, 2015
	2004 Dodge Stratus ES 2.7L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1B3EL56R84 P0300: Multiple Cylinder Misfire Detected. ... ran fine and had P0300 and P0301. I pulled Plugs, looked fairly new. Put coil and plug in number one cylinder and did some other needed steering repairs. When I started the vehicle later ...	October 14, 2015
	2011 Chevrolet Traverse LTZ 3.6L No Start, Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on ... Traverse 3.6l vin D. Customer stated that the vehicle would idle poorly when hot intermittently. Also when vehicle idles poorly it would also have poor performance. Customer stated no codes in system. I arrived at the repair facility and found 4 codes in h...	October 19, 2015
	2006 Honda Civic Hybrid 1.3L Misfire, MIL Lamp on VIN: JHMFA36276 P0300: Random Misfire Detected. This is a guy I work with mom's car, so I'm going by second hand info. Car appears to run OK, but keeps setting random misfire codes. One fuel injector "O" ring was leaking and solved. Yet to be checked is fuel pressure, but I would think that isn't go...	October 19, 2015
	2008 Land Rover LR2 SE 3.2L Misfire, MIL Lamp on VIN: SALFP24N38 P0300: random misfire. Thanks in advance. Customer came in as a first timer with an overheating issue and concern of blown head gasket. He replaced a coolant hose that burst unkwowingly and started his overheating. I confirmed a bad head gasket(heavy smoke from exhaust and chocolate...	October 19, 2015
	2008 Land Rover LR2 SE 3.2L Misfire, MIL Lamp on VIN: SALFP24N38 P0300: random misfire. Thanks in advance. Customer came in as a first timer with an overheating issue and concern of blown head gasket. He replaced a coolant hose that burst unkwowingly and started his overheating. I confirmed a bad head gasket(heavy smoke from exhaust and chocolate...	October 20, 2015
	2004 Lexus IS300 3.0L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: JTHBD19244 P0300: Multiple Cylinder Misfire Detected. Not sure where to go with this one. Customer states: car had a slight misfire for a couple of weeks, only when backing out of parking spaces but cruised fine and no cel. Problem started to get worse, eventually it threw a cel, and missed at a cruise, and under...	October 22, 2015
	1997 GMC Jimmy SL 4.3L Misfire VIN: 1GKDT13W2V P0300: Multiple Cylinder Misfire Detected. Vehicle came in with multiple codes (P0300, P0306, P1463) Initially no misfire was noted with the scanner, but the fuel gauge wasn't working and evap monitor hadn't run. We replaced the fuel pump with a new Delco unit because the sender and fuel tank pressure ...	October 28, 2015
	2004 GMC Sierra 1500 SLE 5.3L Misfire VIN: 2GTEC13T44 P0300: Multiple Cylinder Misfire Detected. ... Fault code P0300 Random Miss Fire Verified engine miss fire during power balance test Disconnect injector connector on cylinder number 4 and no RPM drop at idle and tip in throttle Disconnect ignition coil connector on cylinder number 4 and no RPM drop at...	October 28, 2015
	1998 Toyota Corolla CE 1.8L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1NXBR18E5W P0300: Multiple Cylinder Misfire Detected. This Corolla is being naughty. OK, car comes in with misfire, lean codes and running rough. Replaced plugs and wires and fixed the misfires. Problem is the fuel trims are waayyyy out. It's adding about 39% ltft,19% stft. Searched all over and can't locate a va...	October 30, 2015