Question about Chevrolet Tahoe

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2000 chevy tahoe has p0301. spark plug on #1 and wires are ok.rotor and cap is new. erase the code and run the eng. around the block and p0301 is back. what cause the p0301 keep coming back.

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  • Rudy Cordova
    Rudy Cordova Aug 29, 2010

    thank you very much. this will help me a lot

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Good Evening, I am sorry to hear you are having problems with a misfire on your truck. 0301 is of course a misfire cylinder one, which can be caused from lack of fuel, spark or even an intake gasket leak (which is what I see a lot of). First off I would tell you to pull the spark plug and check compression on that hole, then pull the one next to it and check it for reference. 100-150 or better is what I'm guessing you will see, after that swap those 2 spark plugs and see if you end up with a different code. A vacuum leak will make it miss even if it is on just one cylinder. I hope this helps you with some figuring out, and if you have any more questions please feel free to ask.
Thanks,
Joey

Posted on Aug 29, 2010

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1 Answer

Replaced plugs wires and coil pack keeps codeing cylinder 1 2 and 3 misfire


P0301 Code - Cylinder #1 Misfire
A P0301 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #1.

Symptoms may include:
- the engine may be harder to start
- the engine may stumble / stumble, and/or hesitate, other symptoms may also be present.

A code P0301 may mean that one or more of the following has happened:
- Faulty spark plug or wire
- Faulty coil (pack)
- Faulty oxygen sensor(s)
- Faulty fuel injector
- Burned exhaust valve
- Faulty catalytic converter(s)
- Running out of fuel
- Poor compression
- Defective computer

* This conditions is the same when code is P0302 or P0303.

Possible Solutions:
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 14, 2012 | 2000 Ford Windstar

1 Answer

Replaced plugs wires and coil pack keeps codeing cylinder 1 2 and 3 misfire


Hi John:
P0301 Code - Cylinder #1 Misfire
A P0301 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #1.

Symptoms may include:
- the engine may be harder to start
- the engine may stumble / stumble, and/or hesitate, other symptoms may also be present.

A code P0301 may mean that one or more of the following has happened:
- Faulty spark plug or wire
- Faulty coil (pack)
- Faulty oxygen sensor(s)
- Faulty fuel injector
- Burned exhaust valve
- Faulty catalytic converter(s)
- Running out of fuel
- Poor compression
- Defective computer

* This conditions is the same when code is P0302 or P0303.

Possible Solutions:
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 14, 2012 | 2000 Ford Windstar

2 Answers

I have a 1997 chevy tahoe the problem is it trembles all the time and the check engine light comes on and i checked it it said random misfires


A random misfire code is usually a p0300 and this is usually caused by a clogged/restricted catalytic converter or exhaust system. Lets say this is a v8 if a certain cylinder wasn't firing it would be a p0301 or p0307 for example in which I'd suggest for you to inspect your spark plugs to see if they are fouled and then to test the circuit for a good spark by placing your plug wire with plug installed against the manifold and have someone crank the motor. A high voltage spark will be white or slightly light blue a weak spark wolud be an orange/reddish color which would denote a faulty plug wire/coil pack/ignition coil etc etc. A mechanic or shop with a dwell meter can cancel out each cylinder to determine if that's at fault but my money's on the cat.

Apr 23, 2011 | 1998 Chevrolet K1500

1 Answer

What part get replaced on a complete tune up on a 2000 chevy tahoe?


I would replace
1. spark plugs. Do not go cheap on the plugs use the proper AC Delco spark plug
2. cap and rotor
3. spark plug wires
4.fuel filter
and then i would have a fuel injection cleaning done . there is not a timing adjustment or air fuel adjustment this is all done by the PCM ( Powertrain Control Module )

Mar 04, 2011 | 2002 Chevrolet Tahoe

1 Answer

1999 safari van 4.3 6 cyl. has a service code PO


P0301 is a DTC code that indicates a misfire to cylinder one. It could be a bad spark plug, spark plug wire, rotor and cap, a dirty fuel injector, or the worst a bad head gasket. Cylinder 1 is the first cylinder on the drivers side, towards the front. Start with the simple and check the spark plug wire and add fuel injector cleaner to the gas tank. Good luck and hope this helps you get you van running 100% soon. If that did not help, then your going to have to do a tune up by replacing the spark plugs, wires and rotor and cap. You can get all the parts you need at Auto Zone and they can give you the step by step to get the job done with common tools in under 2 hours of your time. Keep me posted, be glad to know you got your van running 100% again soon.

Oct 27, 2009 | 1999 GMC Safari

2 Answers

Spark plug order to distributor


For a 1985 Chevy S10 with a 2.8L engine the firing order is: 1-2-3-4-5-6 The Distributor rotation is clockwise.Take off the cap and bump engine till the rotor points to the no. 1 plug. this is the no.1 contact on the cap. follow rotation around the cap in order. {ie. 2,3,4 ect.} hope this helps.

Oct 12, 2009 | 1985 Chevrolet Chevy

1 Answer

2000 vw beetle has a p0301.i already channged


Did you swap out your distributor cap and rotor? Try that first - it's not going to be the cat. You may be losing compression in cylinder #1 one... Hope its the cap/rotor...

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