Question about 1998 Chevrolet Express

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Would start and idle least bit of throttle and it sounded like it was coming apart then die obd code was po301= cyl 1 misfire. could it have jumped time?

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  • Chevrolet Master
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Unlikely spray the ignition wires with water and look for electrical leaks. Check condition of spark plugs too. More likely to need a tune up than it jumping timing

Posted on Nov 13, 2009

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3 Answers

Have a missing on 08 f150 4.6 went to auto zone and got a code reading and it said probable cause is a sludge throttle body/air flow got cleaner for it and clean throttle body but it still misses some one...


it is possible for it to be a coil, the thing with fords are that it takes alot of time for the misfire counter to turn the check engine light on and at the smae time set a code for missfire, if you have a code reader available check to set if there is a po301-po302 -po303,and so on the p is for power tran the o is that it is a generic code 3 indicateds misfire, 01,02 indicate which cly. is misfiring , alot of time you have to drive the fords for awhile before it will set a misfire code. if you have a good scan tool you can go to mode 6 and check misfire counters for which cly. is missing. than you can check compression in that cly, chec coil and plug.

Oct 30, 2013 | Cars & Trucks

1 Answer

CEL light flashing-shuddering when idle. 03 passat 1.8 Turbo. Thinking its an air leak somewhere? Can hear air but can't figure out where its coming from...


A flashing cel indicates misfiring. A common problem is a bad ignition coil. The easiest route for diagnosis is the check the trouble codes(autozone and some other parts stores will scan for free, or an OBDII code reader is not too expensive to buy). The code should tell you which cylinder is misfiring(PO301 means cyl #1, 302 cyl #2, etc). Once you know which it is, swap the ignition coils around. If you have a #1 misfire, swap coils 1 and 4, clear the codes, then check it again. If the misfire moves, you know you've got a bad coil. If the misfire is air or fuel related, as with an intake leak, other codes should come up as well as the misfire.

Feb 08, 2011 | 2003 Volkswagen Passat

1 Answer

2003 Hyundai Sonata with 4 cyl. PO301 error code. Have replaced spark plugs, wires, coil packs, and mass air flow sensor. Replaced air filter due to heavy gas smell. Car was starting after tapping gas 3...


P0301 - Cylinder 1 Misfire Detected.

Possible Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak at cylinder

Possible Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

Being you have a heavy gas smell I would look into the injectors. If injector #1 is over producing it can cause a misfire. Test your compression and fuel pressure.

Jan 17, 2011 | Hyundai Sonata Cars & Trucks

3 Answers

A p0301 p1142 p1545


CODE PO301 - CYLINDER NUMBER 1 MISFIRE DETECTED. POSSIBLE CAUSE- BAD COIL - SPARK PLUG - INTAKE MANIFOLD VACUUM LEAK - DIRTY OR FAULTY FUEL INJECTOR. CODE P1142 - DID NOT SEE. CODE P1545 - THROTTLE VALVE ACTUATOR MALFUNCTION.POSSIBLE CAUSE THROTTLE VALVE CONTROL MODULE FAULTY - THROTTLE VALVE IS DAMAGE OR DIRTY - THROTTLE VALVE MUST BE IN THE CLOSE POSITION - ACCELERATOR PEDAL OUT OF ADJUSTMENT. THROTTLE POSITION ACTUATOR IS SHORTING TO GROUND OR POWER.

May 09, 2010 | 2000 Volkswagen Jetta TDI

1 Answer

Vehicle was involved in accident dealership claims jumped time -runs and makes a noise like rattling -never gives same codes -first diag .code po301 said no compression on cyl 1 and 3-tore timing apart and...


p0301=does not mean no compression,it means the computer saw a misfire on # 1 cylinder,
P0345=cam shaft position sensor bank 2,
if the timing marks are on ,i am thinking your hearing a sound of the timing being set too high and pinging under acceleration,try an experiment,refill with a higher grade of fuel for one tank to see if your noise leaves or you hear a difference.

Dec 16, 2009 | 2004 Mazda 6

1 Answer

Audi 2000,1.8 turbo,code po300,po301,po302


P0300 - Combination misfire detected
P0301 - Cyl 1 misfire
P0302 - Cyl 2 misfire

If it has a lot of miles it needs a tune up.
Fill tank with high quality premium fuel
Check fuel pressure

Sep 27, 2009 | 2001 Audi A4

1 Answer

I have a 318i 1998, the engine light came on. i hook up my obd scaner to it and the trouble codes are as follows p1174 (fuel trim adaptation additive bank 1 malfunction,po300 (random/multiple cyl. misfire...


Sounds like it may be running a bit lean - do basic checks for air leaks in the induction system (such as leaking manifold gasket, loose hose fittings to air flow sensor etc).
Condition of HT leads also worth a check.

Jun 07, 2009 | 1999 BMW 318 ti

1 Answer

2000 Chevrolet Venture multiple codes stalling and rough idle


Look for broke/ shorted wires on Crank sensor.. thanks

Mar 17, 2009 | 2000 Chevrolet Venture

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