Join Now

P0300 Diagnostic Trouble Code Discussion for January 2011

Multiple Misfire Detected *

Note: This is a professional automotive technician's resource.

Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0300

	Help Request	Posted
	2004 Chevrolet Cavalier 2.2L Misfire VIN: 1G1JC52F64 P0300: Multiple Engine Misfire Detected. This one has me a bit puzzled. The customer said the vehicle ran fine the day before but upon starting it the following day it ran rough.Has a po300 code for multiple misfires. My scan tool shows the misfires are limited to cylinders 2 & 3 and the misfires...	January 01, 2011
	1999 Chevrolet S10 2.2L Hesitation, Surge, Misfire, MIL Lamp on VIN: 1GCCS1447X P0300: Multiple Engine Misfire Detected. Hi Guys, I need some help!!This truck came in running rough. The wires were arching the plugs were fouled. I changed plugs and wires, fuel filter and cleaned the tb and flushed the injectors. When it starts is has a slight miss for 20sec. The complaint is no p...	January 03, 2011
	2005 Chrysler Pacifica 3.8L Misfire VIN: 2C4GM48L25 P0300: Multiple Misfire Detected. coil 2 & 5 no spark. have spark on all others. replaced coil to no avail. replaced original worn out plugs to no avail. chrysler techs any ideas?? have never seen p2305 before, a little lost..appreciate any help!	January 03, 2011
	1996 Oldsmobile Cutlass Ciera 3.1L No Start, MIL Lamp on VIN: 1G3AJ55M0T P0300: Multiple Engine Misfire Detected. i towed this from a rual area upon first inspection found good spark good fuel pressure but vehicle ran after taking it off trailer pulled in my shop to have it never run again im presuming after testing for injector pulse and ohming the injectors that i have ...	January 03, 2011
	2008 Other GM 2008 3.6L Hesitation, Misfire, MIL Lamp on VIN: 6G1EK52B78 P0300: random misfire. ... which made by Holden, its use same Engine as GMC Acadia and Cadi CTS. Customer came for MIL on found P0300 and P0306 with no actual misfire, only MIL on cleared and he take the car after 2 weeks he came back for same conc...	January 03, 2011
	2005 Chrysler Pacifica 3.8L Misfire VIN: 2C4GM48L25 P0300: Multiple Misfire Detected. coil 2 & 5 no spark. have spark on all others. replaced coil to no avail. replaced original worn out plugs to no avail. chrysler techs any ideas?? have never seen p2305 before, a little lost..appreciate any help!	January 04, 2011
	1996 Oldsmobile Cutlass Ciera 3.1L No Start, MIL Lamp on VIN: 1G3AJ55M0T P0300: Multiple Engine Misfire Detected. i towed this from a rual area upon first inspection found good spark good fuel pressure but vehicle ran after taking it off trailer pulled in my shop to have it never run again im presuming after testing for injector pulse and ohming the injectors that i have ...	January 04, 2011
	2008 Other GM 2008 3.6L Hesitation, Misfire, MIL Lamp on VIN: 6G1EK52B78 P0300: random misfire. ... which made by Holden, its use same Engine as GMC Acadia and Cadi CTS. Customer came for MIL on found P0300 and P0306 with no actual misfire, only MIL on cleared and he take the car after 2 weeks he came back for same conc...	January 04, 2011
	2006 Mercedes-Benz S65 AMG 6.0L No Start, Misfire, MIL Lamp on VIN: WDBNG79JX6 P0300: random misfire. I need help with this beast,only happen whenever car decide to quit,sympton crank over and runs with misfire and some time missing so bad car won't start. I'm suspecting coil pack but cost of the coil pack is $1250.00 per side so I really need someone to shine...	January 05, 2011
	2000 Toyota Avalon XLS 3.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 4T1BF28BXY P0300: Multiple Cylinder Misfire Detected. Car came in with a complaint of loss of power on the highway. Found P1349 VVT malfunction and misfire codes on front bank. We replaced VVT oil control valve clear codes and test drive car drives fine cold after about 15 minutes of highway driving you feel a sl...	January 05, 2011
	2003 GMC Envoy XL SLT 5.3L Misfire, MIL Lamp on VIN: 1GKES63M58 P0300: Random misfire. ... 5.3 liter. Truck came in with a p0300 code. Looking at the misfire counter #5 cyl had aver 15,000 misfires with all other cylinders in the teens. I have swapped the coil,plug and injecters with other cylinders but the problem stays on the #5 cyl. Ran a com...	January 06, 2011
	2004 Ford Mustang GT 4.6L Misfire VIN: 1FAFP42XX4 P0300: Random misfire. Customer brought in mustang with misfire problem. Looked at modis and all 8 misfire codes were present along with misfire at start up. Vehicle only does this at 2000 to 3000 rpm at cruise. Here is what gets me. When it happens, short term fuel trims stick at 0...	January 07, 2011
	2001 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNT13W912 P0300: Multiple Cylinder Misfire Detected. Vehicle can to us with a flashing check engine light and misfire. Has just been tune up by another shop, same problem. Suspect distributor or cam/crank sensor. Has misfire on cylinders 1,2, and 4 with 4 having the most. Very slight misfires on 5. 3 and 6 ok. T...	January 09, 2011
	2001 Saturn LW300 3.0L No Start, Poor Idle Quality, Stall, Misfire VIN: 1G8JW82R71 P0300: Random Misfire Detected. vehicle came in running poorly went out to get car in am would not start at all unless holding throttle to floor after starting stalls with in 10 seconds and will not restart without holding to floor disconnected 1 3 5 coil no change runs exactly the same fuel...	January 10, 2011
	1999 Chevrolet K1500 Suburban 5.7L Misfire, MIL Lamp on VIN: 1GNFK16R1X P0300: Multiple Cylinder Misfire Detected. Feel kinda dumb doing a post for a miss on a Chevy, but here goes. Started with just #7, perfect at idle, and under load, but no load or close to none, #4 and #7 just shut down off idle and all the way up to 2500 RPM. You just cannot ever feel it miss, it's ju...	January 12, 2011
	2003 Mini Cooper S 1.6L Excessive Emissions, Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: WMWRE33453 P0300: Random misfire. ... after playing with throttle and idle for a while i managed to get it in shop, plugs were wet, replaced plugs after airing out cyls of excess fuel, start car and same issue coil firing seems erratic, replace coil and wires, car started better and smoothed o...	January 14, 2011
	2006 Mercedes-Benz R350 4Matic 3.5L Hesitation, MIL Lamp on VIN: 4JGCB65E46 Truck was bought a few months back-used car yard. Truck ran very well, clean truck but large leak issuses. Truck was a tennis ball between customer and selling dealer. Fixing included Oil leaks - valve cover gaskets, cam plugs rear, CV axle , power steering pu...	January 15, 2011
	2008 Ford F-150 XL 5.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTPX14V68 P0300: random misfire. looking for some help, first we are diesel techs and dont have any time on spark ignition engines. we took this job for a good customer. the truck has codes po300/po305/po306/po307/po308 all misfire codes on the same bank.fuel pressure is good,changed all spar...	January 18, 2011
	2007 Jeep Patriot Limited 2.4L Cuts out, Stall, MIL Lamp on VIN: 1J8FF48W87 P0300: Multiple Cylinder Misfire Detected. Need some thoughts on this Patriot if you please. Vehicle was presented by customer with the following complaints: "When driving at highway speeds, vehicle jerks, looses power, CEL comes on. Also, ESP light comes on randomly." I took the vehicle for ...	January 18, 2011
	2003 Mini Cooper S 1.6L Excessive Emissions, Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: WMWRE33453 P0300: Random misfire. ... after playing with throttle and idle for a while i managed to get it in shop, plugs were wet, replaced plugs after airing out cyls of excess fuel, start car and same issue coil firing seems erratic, replace coil and wires, car started better and smoothed o...	January 18, 2011
	1999 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W4X P0300: Multiple Cylinder Misfire Detected. this blazer is ackting crazey.on the scanner showing 5,3 whith the most missfires but 1,4 has a few.if u increase the throttle missfires go to 0 exept 5.shows bank one lean an bank 2 reach.there is a hundred degrees diffrent between them.customer brought it in...	January 19, 2011
	2007 Hyundai Accent SE 1.6L Poor Idle Quality, Misfire VIN: KMHCN45C67 P0300: Multiple Misfire Detected. hey guys and gals...need some help...new customers vehicle came in on the hook not running. diagnosed at local dealer as "plugged cats". I changed both with used units(secondary one was broken down into pieces)as new were $2500 plus labour. on first st...	January 19, 2011
	2002 Chevrolet Blazer LS 4.3L Misfire, MIL Lamp on VIN: 1GNCT18W82 P0300: Multiple Cylinder Misfire Detected. ... was at the first shop for what we know found out was a ce light problem. They replaced the computer, intake gaskets, timing chain & gear, distributor, and crank sensor. The way we understand from the customer after this it would not rev up. At that poi...	January 20, 2011
	2005 Ford Explorer XLS 4.0L Cuts out, Misfire P0300: Multiple Misfire. Finished repair, backed customers vehicle out and prepared it for delivery. 5 minutes after my delivery driver left he called and stated the vehicle had a horrible misfire and vehicle was to weak to move. Brought it back to the shop, found the codes listed abo...	January 20, 2011
	2002 Isuzu Axiom 3.5L Flashing MIL/no miss VIN: 4S2CE58X22 P0300: Multiple Cylinder Misfire Detected. ... others benefit. We replaced the spark plugs for maintenance and ever since then, sometimes while accelerating the check engine light would flash. When you go to idle, the chk eng light would stop flashing and go out, it would not remain lit. Truck runs fin...	January 20, 2011
	2007 Chevrolet Cobalt LS 2.2L Stall, Misfire VIN: 1G1AL55F27 P0300: Multiple Engine Misfire Detected. cylinders#1&4 briefly missfire in below 0 degree weather. have yet to duplicate missfire. customer also states slight / brief shudder uphill under hard acceleration.fuel pressure in spec ,spark plugs new , compression @ 175# . checked for vacuum leaks when...	January 21, 2011
	1998 Dodge B1500 3.9L Cuts out VIN: 2B7HB21X4V P0300: Multiple Cylinder Misfire Detected. ... was 1 month old, from another shop but PLUGGED SOLID! Installed new exhaust, sounds GREAT! now Oil light on. Replaced Oil pump. It was also PLUGGED! On test drive, engine "hicuped" but diddn't stall. Check engine light came on, with a po300 code. c...	January 22, 2011
	2003 Chevrolet Avalanche 1500 Z71 5.3L Surge, Cuts out, MIL Lamp on VIN: 4545A06893 P0300: Multiple Cylinder Misfire Detected. ... 2003 it cuts out on load about 25% of load when it's hot (in close loop). It's the same that if i shut off the key and i come on. I have 2 codes P0101 Mass air flow performance and P0300 Random missfire. I have changed 2 times the mass air flow changed 2 ...	January 24, 2011
	2004 Isuzu Axiom S 3.5L Hesitation, Misfire VIN: 4S2DE58Y84 P0300: Multiple Cylinder Misfire Detected. ... from another shop and trying to get a few things clear. Before the engine threw a rod, the vehicle got t-boned because the vehicle hesitated in an intersection. The problem is still there. All I get is a P0300 code. Bank 1 O2 sensor stays lean at idle and ...	January 24, 2011
	2002 Chevrolet Silverado 2500 HD 6.0L Misfire VIN: 1GCHK29UX2 P0300: Multiple Cylinder Misfire Detected. I need help, we have a 02 30k mile truck, misses on cylinders 3&4, injector pulse good, spark is good, spark plugs fairly new and not gas fouled. We have found some bulletins related to intake internal leaks, but need a test for an internal leak that might...	January 25, 2011
	2005 Chevrolet Tahoe LS 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNEK13T65 P0300: Multiple Cylinder Misfire Detected. ... windedness. just want to make sure I am thoroughly diagnosing this problem Car runs rough at idle and is in fact misfiring. Trouble code p0300 is the only code showing up. I accessed misfire data and about four cylinders show some misfire data, but # 3 is ...	January 25, 2011
	2003 Chevrolet Avalanche 1500 Z71 5.3L Surge, Cuts out, MIL Lamp on VIN: 4545A06893 P0300: Multiple Cylinder Misfire Detected. ... 2003 it cuts out on load about 25% of load when it's hot (in close loop). It's the same that if i shut off the key and i come on. I have 2 codes P0101 Mass air flow performance and P0300 Random missfire. I have changed 2 times the mass air flow changed 2 ...	January 26, 2011
	2004 Chevrolet Tahoe LT 4.8L Poor Idle Quality, MIL Lamp on VIN: 1GNEK13V64 P0300: Multiple Cylinder Misfire Detected. Thanks in advance for your help. Please read related history and repairs before replying. This is my bosses truck and we are at a loss. It misses only at idle, runs great going down the road. It is missing mostly on Cyl. #1 and slightly on #8. You can watch it...	January 26, 2011
	2005 Audi A6 Quattro 4.2L Misfire VIN: WAUDL74F45 This car wil occasionally miss. It seems to come on when idling. The car will miss for 30 seconds or so, and then straighten out by itself. The check engine light will flash and then stay on for a day or two and then go out on it's own. We have never gotten it...	January 27, 2011
	1996 BMW Z3 Roadster 1.9L Poor Idle Quality, Misfire VIN: 4USCH7328T P0300: Random/multiple cylinder misfire detected. Intermittently problem with poor idle quality and misfire. I have driven this car for a 1/2 hr. stopped and drove for another 1/2 hr and everything worked perfect. The next time I started the car it had a poor idle and a bad misfire. This is when the codes s...	January 27, 2011
	2004 Chevrolet Cavalier 2.2L Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 1G1JC52F04 P0300: Multiple Engine Misfire Detected. I have a cavalier that has a rough idle,stalls at stops,and runs very rich.have checked/replaced coil cover,plugs,map sensor with no change(all factory parts).have checked for vac.leaks with none found.no mass air flow sensor,although it acts like a bad one.an...	January 27, 2011
	2005 Audi A6 Quattro 4.2L Misfire VIN: WAUDL74F45 This car wil occasionally miss. It seems to come on when idling. The car will miss for 30 seconds or so, and then straighten out by itself. The check engine light will flash and then stay on for a day or two and then go out on it's own. We have never gotten it...	January 28, 2011
	2001 Honda Accord EX 2.3L Poor Idle Quality VIN: 1HGCG66851 P0300: Multiple Misfire Detected. 2001 Honda presented with leaking balance shaft seal found that the seal scored the pump housing replaced oil pump timing belt and seals; vehicle towed back in with broken cam clean break at pulley to cam mating, obtained a used cam and installed found that #2...	January 28, 2011
	2003 Saab 9-5 Linear 2.3L MIL Lamp on VIN: YS3EB49E03 P0300: Rand miss. wtf... we got a used ecu from a wrecker and programed it. idle seems worse. misfire codes set at idle as before thanks in advance to anyone who's seen this or can give us a direction to blindly follow!?	January 28, 2011
	2003 Volkswagen Jetta GL 1.8L MIL Lamp on VIN: WVWSE61J73 Hi could use some help from you vw techs this car came in with the codes listed above normally i would think mass air flow sensor but we recently replaced. The readings are 30% load at idle and up to 140% under full load. I have smoke tested the intake for lea...	January 28, 2011
	2000 Lexus ES300 3.0L Hesitation, Misfire, MIL Lamp on VIN: JT8BF28G9Y P0300: Multiple Cylinder Misfire Detected. Hello, This one has us stumped. The car starts fine cold, runs well for the first few miles until fully warmed-up. Then on moderate acceleration from a stop or low speed as in out of a right turn the car will hesitate and the misfire monitors show #1 - over 5...	January 29, 2011
	2004 Chevrolet Cavalier 2.2L Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 1G1JC52F04 P0300: Multiple Engine Misfire Detected. I have a cavalier that has a rough idle,stalls at stops,and runs very rich.have checked/replaced coil cover,plugs,map sensor with no change(all factory parts).have checked for vac.leaks with none found.no mass air flow sensor,although it acts like a bad one.an...	January 31, 2011
	1999 Volvo S80 T6 2.8L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: YV1TS90D8X P0300: random missfire. ... a couple months ago for a check engine light on. Had a code for bank 2 rear o2s heater and some fuel trim code. owner stated that the car had been sitting for about a year prior. we changed the 02s and cleared the light. the fuel trim numbers looked ok so ...	January 31, 2011