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P0300 Diagnostic Trouble Code Discussion for January 2008

Multiple Misfire Detected *

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Trouble Ticket Help Requests for DTC P0300

	Help Request	Posted
	1999 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13R9X P0300: Multiple Cylinder Misfire Detected. ... willing to think about this one. 99 Tahoe, 4 dist caps and rotors replaced in last 32 months or 35,000 miles. Truck came in on day before New Years with complaint of mis fire, engine light on. Scanned computer, had P0300, Random misfire. Pulled dist cap an...	January 01, 2008
	1997 Chevrolet Monte Carlo Z34 3.4L Misfire P0300: Multiple Engine Misfire Detected. I need some direction. I am trying to fiqure out the misfire. The tech that worked on this vehicle is no longer employed. The vehicle came in with the timing belt off. He did a belt, head job and new tensioner. The engine is a DOHC. I have a misfire at idle on...	January 02, 2008
	1996 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GCEK19R4T P0300: Multiple Cylinder Misfire Detected. Hi guys, and gals, Just back from vacation in florida, and i have this gem, and two dead chryslers waiting for me...guess this means the boss really does like me, lol. Anyway, this truck was looked at here at our shop while i was still in florida, by theother...	January 04, 2008
	2000 Mercedes-Benz ML320 3.2L Misfire VIN: 4JGAB54E8Y P0300: Random Misfire. Please help, this thing is kicking us hard. This is our second post on this car addressing a seperate but related issue. The first concerned plugged exhaust. Now we have a persistant missfire on #3 that varies in intensity only at low RPM/low load conditions. ...	January 04, 2008
	2001 Chevrolet Suburban 1500 5.3L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 3GNEC16T81 P0300: Multiple Cylinder Misfire Detected. hello, i have a suburban that has long term fuel trims in upwards of 25%. has new o2 sensors(factory), fuel pump has been replaced and fuel pressure regulator also.(fuel pressure is still borderline while it's running, but i also dont have a running spec) and ...	January 06, 2008
	2000 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1G6KD54Y4Y P0300: Engine Misfire Detected. ... running problem and the mil on. pulled codes and p0300 was there. misfire data had 9100 counts on #3cyl and between 100 and 700 counts on #1,5,7. Of course it was running fine at that time and the rest of the day. the coil tower ohmed different on #3 and t...	January 07, 2008
	2001 Chevrolet Suburban 1500 5.3L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 3GNEC16T81 P0300: Multiple Cylinder Misfire Detected. hello, i have a suburban that has long term fuel trims in upwards of 25%. has new o2 sensors(factory), fuel pump has been replaced and fuel pressure regulator also.(fuel pressure is still borderline while it's running, but i also dont have a running spec) and ...	January 07, 2008
	2001 Volkswagen Passat GLS 1.8L Misfire VIN: WVWAC63B21 P0300: random misfire. This car has two dead cylinders. Compression ok and even all cylinders. Cyl. leakdown less then 10% all cylinders. Now the misfiring cylinders are actually cyls. 2 and 4. I've swapped all parts from 1+3 to 2+4 with no changes. What I've actually discovered is ...	January 07, 2008
	2000 Chevrolet Cavalier Z24 2.4L Excessive Emissions, Poor Idle Quality, Surge, MIL Lamp on VIN: 3G1JF12T7Y P0300: Multiple Engine Misfire Detected. Any other suggestions as per testing before tearing out front cover to check for jumped tooth?	January 08, 2008
	2001 Mazda Protege ES 2.0L Misfire, MIL Lamp on VIN: JM1BJ22551 P0300: Multiple Misfire Detected. ... comes in for a p0300 code coming on approximately every 200 miles or so. we run this vehicle in the shop, spray the ignition system down, check for leaks, and car runs perfect in shop and on road tests. I even took it home the second time in after replacin...	January 08, 2008
	2000 Chevrolet Silverado 1500 5.3L Misfire VIN: 1GCEK19T2Y P0300: Multiple Cylinder Misfire Detected. Ok techs, I need help. Please read all of the post this truck came to me with a misfire code and the cylinders counting up were #3 and #4. had new plugs and wires. ignition scope analyzed. patterns looked ideal. no noticeable difference in any patterns. tried ...	January 09, 2008
	2001 Chevrolet Silverado 2500 6.0L Misfire, MIL Lamp on VIN: 1GCGC24U11 P0300: Multiple Cylinder Misfire Detected. This engine is bugging me. It came to me with flashing CEL code PO300. I checked misfire counter and #2 and #7 were counting misfires regularly at idle and PT. No. 7 is the worst by far. The engine has an audible miss at idle and throttle snap but plenty of po...	January 09, 2008
	2003 Hummer H2 6.0L Misfire VIN: 5GRGN23U83 P0300: Multiple Cylinder Misfire Detected. this hummer look simple 6.0L, but i can figure out, i have miss fire only on bank 2, 2,4,6,8, have miss count, we been try put new spark plug, intake manifold gasket, it won't help, the injector test our good, have good blink , and good spark every cylinder, c...	January 10, 2008
	2000 Toyota Tundra SR5 4.7L Surge, Misfire, MIL Lamp on VIN: 5TBBT4419Y P0300: Multiple Cylinder Misfire Detected. dead mis cyl. 8 has constant misfire. changed bad fuel injector did fuel system clean, swapped plugs and coil pack with no change.	January 10, 2008
	2001 Chevrolet Silverado 2500 6.0L Misfire, MIL Lamp on VIN: 1GCGC24U11 P0300: Multiple Cylinder Misfire Detected. This engine is bugging me. It came to me with flashing CEL code PO300. I checked misfire counter and #2 and #7 were counting misfires regularly at idle and PT. No. 7 is the worst by far. The engine has an audible miss at idle and throttle snap but plenty of po...	January 11, 2008
	2000 GMC Sierra 1500 SL 5.3L Poor Idle Quality, MIL Lamp on VIN: 2GTEC19T2Y P0300: Multiple Cylinder Misfire Detected. Loyal cust came in awhile ago with same codes. We checked a few basics and sent him to the chev dealer up the road. We are a Ford dealership. They checked it, replace one injector and chemically cleaned the rest of the injectors. Now he has come back to us wit...	January 11, 2008
	2000 Mercedes-Benz ML320 3.2L Misfire VIN: 4JGAB54E8Y P0300: Random Misfire. Please help, this thing is kicking us hard. This is our second post on this car addressing a seperate but related issue. The first concerned plugged exhaust. Now we have a persistant missfire on #3 that varies in intensity only at low RPM/low load conditions. ...	January 11, 2008
	2001 Mazda Protege ES 2.0L Misfire, MIL Lamp on VIN: JM1BJ22551 P0300: Multiple Misfire Detected. ... comes in for a p0300 code coming on approximately every 200 miles or so. we run this vehicle in the shop, spray the ignition system down, check for leaks, and car runs perfect in shop and on road tests. I even took it home the second time in after replacin...	January 12, 2008
	1996 Chrysler Sebring JX 2.5L Hesitation, Misfire VIN: 3C3EL45H6T P0300: Multiple Cylinder Misfire Detected. whats up techs this sebring has got agood one when engine is cold has alean misfire hesitation pops and spits once the engfine warms slightly it ruyns perfect scanned data cold tps looks good coolant temp readings are correct dealer had car first they replaced...	January 14, 2008
	1997 Saturn SL2 1.9L Misfire VIN: 1G8ZJ5279V P0300: Random Misfire Detected. we a tune up on this car and cleared all codes on 1-7-2008 had customer drive car for three days and no monitors had run,we have had the car for three days and we cant get any of the monitors to run either, all data on scanner looks good ,any help	January 14, 2008
	1997 Chevrolet K1500 4.3L Hesitation, Misfire VIN: 1GCER14W7V P0300: Multiple Cylinder Misfire Detected. ... The scanner pulled codes #P0172, Po175, and P0300. Most cylinders are randomly misfiring. Tune up was done around 3 months ago.Has a new catalytic converter and two (2) O2 sensors. The co...	January 15, 2008
	2002 Saturn Vue 3.0L Hesitation, Surge, MIL Lamp on VIN: 5GZCZ63B02 P0300: Random Misfire Detected. hi guys, i need help with this car, i checked any thing i could and do n't know what to do next except sanding it to dealer. please let me know if any body knows or have experance this problem on this car. thanks fred	January 15, 2008
	1998 Chevrolet Blazer 4.3L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13WOW P0300: Multiple Cylinder Misfire Detected. ... idle, code P0300: Random cylinder misfire, misfire counters in thousands for cylinders #1, 3, 5 and fuel trim negative for bank #1. Scope pattern acceptable. Fuel pressure within specs. Nothing obvious with scanner data, but cam retard about 10 deg. Remove...	January 17, 2008
	1999 Land Rover Discovery Series II 4.0L Hesitation, Misfire, MIL Lamp on VIN: SALTY1242X P0300: Random Misfire. I checked all my books, but they only show me a generic picture. What is the right connection coilpacks to cylinder? Does anybody has a detailed picture? Fax to 1/[...] or call 1/[...] Thank you guys!	January 17, 2008
	2005 Kia Spectra LX 2.0L Cuts out, Stall, Misfire, MIL Lamp on VIN: KNAFE12154 P0300: Random Cylinder Misfire Detected. this car will stall intermittley alot we have a fleet of these car that we work on after looking at the code info i went to the fuel cap now while this car is running with the gas cap removed a loud swirling noise comes from the fill neck down in the tank also...	January 18, 2008
	2005 Ford Ranger Edge 3.0L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1FTYR10U05 P0300: random cylinder misfire. fords... help please. this truck seems to be running lean by codes and also the way it runs. we can add fuel and it clears up immediately. vacuum looks very steady regardless of where it is and goes down with acceleration. injector pulse width by scanner readi...	January 21, 2008
	2002 Oldsmobile Alero GL 2.2L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on, P0300 P0300: Multiple Cylinder Misfire Detected. ... it down and lost it! I'm missing something with this car... Here is the story,, Car ran fine until last night. It developed a misfire and no power all at once (like turning on a switch). I have it in my shop and I looked at the fluids first,,,no oil in wa...	January 22, 2008
	2000 Chevrolet Astro 4.3L No Start VIN: 1GNDM19W0Y P0300: Multiple Cylinder Misfire Detected. We have an "interesting" problem with a 2000 Chevy Astro with the Vortec 4.3l engine. The truck came in on the hook for stall while driving/no restart. The owner told us that just before it quit, it was backfiring through the intake and out the exhaust...	January 23, 2008
	2004 Honda CR-V EX 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: JHLPD68484 P0300: Random Misfire Detected. ... light on. p0300, p0301, p0302,,,ect... replaced spark plugs due to mileage and used iridium style as required by manufacture. could not get rid of the mis no matter what we did. swapped coils, checked for vacuum leaks, changed plug type. long term fuel tri...	January 23, 2008
	2004 Honda CR-V EX 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: JHLPD68484 P0300: Random Misfire Detected. ... light on. p0300, p0301, p0302,,,ect... replaced spark plugs due to mileage and used iridium style as required by manufacture. could not get rid of the mis no matter what we did. swapped coils, checked for vacuum leaks, changed plug type. long term fuel tri...	January 24, 2008
	2008 Toyota Sequoia Limited 5.7L Surge, MIL Lamp on VIN: 5TDBY68A88 P0300: random misfire. FELLOW TECHNICIANS PLEASE HELP. I BOUGHT MY WIFE A 2008 TOYOTA SEQUOIA LIMITED 4WD 12/21/2007. ON 1/18/2008, WHILE SHE WAS DRIVING THIS VECHILE IT WENT INTO APPARENT LIMP HOME MODE AT 30mph, WOULD NOT ACCELLERATE OVER 5mph. THE FOLLOWING LIGHTS WENT ON - 4WD L...	January 24, 2008
	2001 BMW 525i 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: WBADT4349I P0300: random misfire. ... p0171, p0174, lean system bank 1 and 2, p1343,p1345,misfire cyl#1 and cyl#2 fuel cut off, after a smoke test, I replaced crank case oil seperater vent valve with 4 connecting pipes. was running perfect 20 minutes later c...	January 25, 2008
	2000 Lexus ES300 3.0L Surge, MIL Lamp on VIN: JT8BFZ8GXY P0300: Multiple Cylinder Misfire Detected. This car has high idle until it gets warm then starts surging. I found with the lab scope the ecm is commanding the bank 2 VVT oil control valve to advance and retard. The pulse width is rapidly changing. This causes surging that comes and goes. The idle is hi...	January 25, 2008
	1997 GMC Yukon SL 5.7L Hesitation, Misfire VIN: 1GNEK13RGV P0300: Multiple Cylinder Misfire Detected. several shops have looked at vehicle, hence all the changed parts. When vehicle is cold it runs great, after it warms up it will lose power and run rough, if you stay in the throttle it will back fire in the intake and smother down and die. When you cycle the ...	January 28, 2008
	2002 Honda Accord EX 3.0L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1FGCG16532 P0300: Multiple Misfire Detected. Hello, this Honda has been at three other shops, no parts have been replaced but nothing has been fixed. The engine has a misfire on all cylinders, but mainly #2 and 4 when cold. As the vehicle reaches operating temp the misfire slowly goes away, until gone. I...	January 28, 2008
	1999 Chevrolet Venture 3.4L Poor Idle Quality, Misfire VIN: 1GNDX03E7X P0300: Multiple Cylinder Misfire Detected. heres a good one to all the gm techs i've been on this vehicle for days and i can't figure it out. at idle the fuel trims go up to -17% and has a slight miss it clears up at about 1500-2000 rpms, it also keeps setting misfire codes on bank 1. monotoring misfir...	January 29, 2008
	1999 Dodge Ram 1500 Laramie 3.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1B7HC16X3X P0300: multiple cyl misfire. This vehicle came to me for emissions failure. Had code for coil driver circuit. Replaced coil and code went away. While vehicle was here fuel pump died and replaced it. Went away for about a week and came back with all of these cylinder misfire codes. At an i...	January 29, 2008
	2002 Honda Accord EX 3.0L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1FGCG16532 P0300: Multiple Misfire Detected. Hello, this Honda has been at three other shops, no parts have been replaced but nothing has been fixed. The engine has a misfire on all cylinders, but mainly #2 and 4 when cold. As the vehicle reaches operating temp the misfire slowly goes away, until gone. I...	January 29, 2008
	2000 Dodge Caravan 3.0L No Start VIN: 2B4GP2531Y P0300: Multiple Cylinder Misfire Detected. We got this after the owner didnt trust what the dealer told him. I now wish I didnt get this one - So Iam looking for help. The van will run rough cold 30 to 40 degrees outside after sitting all night.But runs well after a 5 min. warm up. Now if it is 10 degr...	January 30, 2008
	2005 Ford F-250 Super Duty King Ranch 5.4L Cuts out, Misfire, MIL Lamp on VIN: 1FTSW20525 P0300: Random Misfire Detected. vehicle came in for a ceo lack of power , and rough idle . cleared codes and was able to get to code for #2 cylinder 2 times . at freeway speed at 2800 to 3000 rpm steady tip in accel will ping when the light comes and flashes . once it lost alot of power and ...	January 30, 2008
	2006 Hummer H2 6.0L Hesitation, Surge, Poor Fuel Economy VIN: 5GRGN23466 P0300: Multiple Cylinder Misfire Detected. H2 coming in tomorrow, did field test and got these codes. If anyone has had the same problem would be great for an advantage on this repair, as i'm not a G M tech when driving the car would all of a sudden drop 4 cylinders, well that what it feels and sounds ...	January 30, 2008
	1998 Isuzu Amigo S 2.2L MIL Lamp on VIN: 4S2CM57D0W P0300: Multiple Cylinder Misfire Detected. ... gasket failure and rod bearing noise. upon warmup cel started flashing and pending code of p0300. ignition scope shows all o.k. replaced plugs(oe) and wires. have checked everything from cam and crank signatures to vacumm wave and all looks good, not sure ...	January 30, 2008
	1995 Nissan Maxima SE 3.0L Misfire VIN: JHMG5698HJ P0300: multiple cyl miss product of 1320. i ihave got this 1320 thats driving me crazy, compression good , coils good, both affected coils function in #2 cyl, nobody home in #4 and plugs a little black in those two cyls only , short term fuel trim -25 % this is a bit off trying to correct, looking for...	January 30, 2008
	2008 Toyota Sequoia Limited 5.7L Surge, MIL Lamp on VIN: 5TDBY68A88 P0300: random misfire. FELLOW TECHNICIANS PLEASE HELP. I BOUGHT MY WIFE A 2008 TOYOTA SEQUOIA LIMITED 4WD 12/21/2007. ON 1/18/2008, WHILE SHE WAS DRIVING THIS VECHILE IT WENT INTO APPARENT LIMP HOME MODE AT 30mph, WOULD NOT ACCELLERATE OVER 5mph. THE FOLLOWING LIGHTS WENT ON - 4WD L...	January 30, 2008
	2005 Chevrolet Trailblazer LS 4.2L Stall VIN: 1GNET16S66 P0300: Multiple Engine Misfire Detected. customer says rough runny all most dies at light witch would make sence with missfire and cam code	January 31, 2008
	1999 Dodge Neon R/T 2.0L MIL Lamp on VIN: 3B3ES47YXX P0300: Multiple Cylinder Misfire Detected. ... with check eng light illuminated with code P0300. No misfire felt by myself or owner. Replaced worn out spark plugs & wires. Vehicle came back with check eng light illuminated & codes P0300 & P0304. Engine runs fine.EGR OK.Eng Vac at idle 19...	January 31, 2008
	2000 Dodge Caravan 3.0L No Start VIN: 2B4GP2531Y P0300: Multiple Cylinder Misfire Detected. We got this after the owner didnt trust what the dealer told him. I now wish I didnt get this one - So Iam looking for help. The van will run rough cold 30 to 40 degrees outside after sitting all night.But runs well after a 5 min. warm up. Now if it is 10 degr...	January 31, 2008
	2005 Ford F-250 Super Duty King Ranch 5.4L Cuts out, Misfire, MIL Lamp on VIN: 1FTSW20525 P0300: Random Misfire Detected. vehicle came in for a ceo lack of power , and rough idle . cleared codes and was able to get to code for #2 cylinder 2 times . at freeway speed at 2800 to 3000 rpm steady tip in accel will ping when the light comes and flashes . once it lost alot of power and ...	January 31, 2008
	1997 GMC Yukon SL 5.7L Hesitation, Misfire VIN: 1GNEK13RGV P0300: Multiple Cylinder Misfire Detected. several shops have looked at vehicle, hence all the changed parts. When vehicle is cold it runs great, after it warms up it will lose power and run rough, if you stay in the throttle it will back fire in the intake and smother down and die. When you cycle the ...	January 31, 2008
	1998 Isuzu Amigo S 2.2L MIL Lamp on VIN: 4S2CM57D0W P0300: Multiple Cylinder Misfire Detected. ... gasket failure and rod bearing noise. upon warmup cel started flashing and pending code of p0300. ignition scope shows all o.k. replaced plugs(oe) and wires. have checked everything from cam and crank signatures to vacumm wave and all looks good, not sure ...	January 31, 2008