Question about Chevrolet Tahoe

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2000 chevy tahoe 8 cly p0301 a misfire problem. can you show me a picture of suv tahoe intake or tell me how to locate where this possible leaks at. they said an intake leaks can cause a misfire. because spark plug and wires rotor and cap has been replace and p0301 keep coming back. do you know any tools like chemical or leak detector to find a leak.

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  • Rudy Cordova
    Rudy Cordova Aug 29, 2010

    hi , thank you very much. one more question about 8 cyl, when you said #1, 3, 5 is on the right side, is this means you are looking from the front of the eng. or looking and sitting inside the car. i am kind of comfuse do you think you can show a picture. i will double check to make sure if he did it right all this spark plug and wires rotor and caps or coils.

  • Rudy Cordova
    Rudy Cordova Aug 29, 2010

    thank you very very much

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If it keeps coming back as a specific misfire, it is not a leak. The coil insulator(rubber boot on the coil to the plug) should be checked for white markings which indicate tracking and electrical leaks. Now that I think about it, that could be what they meant. Check the spark plug for cracks in the porcelin. If it is not an AC Delco plug, chenge them all. Inferior plugs WILL cause a misfire code to trigger even if the engine is running great. This is something I have dealt with several dozen and experimented with. It is almost 100%! The only other thing that will cause this without it being internal engine components is a faulty injector. The coil and injector may be tested at your local parts store for free. Call them first to make sure. This is a code for just the number 1 cylinder. Inspect there first and let me know. Number 1 cylinder is the first one on the driver's side of the engine. 1, 3, 5, & 7. Even numbers on the passenger side.

Posted on Aug 29, 2010

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Honda odessey engine code p3100


There is no p3100 code!!

I think you copied this wrong. the code is p0301, which is a common one.

The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 1. If the problem persist more tests needs to be done to diagnose problem.

Possible causes
- Faulty spark plug 1
- Clogged or faulty fuel injector 1
- Faulty ignition coil 1
- Fuel injector 1 harness is open or shorted
- Fuel injector 1 circuit poor electrical connection
- Ignition coil 1 harness is open or shorted
- Ignition coil 1 circuit poor electrical connection
- Insufficient cylinder 1 compression
- Incorrect fuel pressure
- Intake air leak

Most likely cause:
Faulty spark plug 1 or Faulty ignition coil 1 (Ignitor coil)

Either are easy fixes. Start with a new spark plug. If the problem continues replace the coil. Pic below. new about $30-$40.





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97 chevy tahoe running rough update....


code P0303 is a misfire code for cylinder # 3, Possible spark plug, wire/coil or injector problem. P0141, bank1 sensor2, is the upstream oxygen sensor, this code may have been set by the misfire of Cyl #3, the lean condition is being cause by the misfire. Fix the misfire and clear the codes and P0141 should not return. If the vehicle is equipped with Coil over plug system try swapping the coil with any one of the others, test drive and if the misfire code changes to another P0300 code ( P0301, P0302, P0304 etc...) the coil has failed and will need to be replaced.

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1 Answer

I have a 97 chevy tahoe 5.7 i just did a intake gasket due to the one given out truck ran fine befor i took it a part but now it runs and throws the p0300 code has a slight rough idle


P0300 random misfire, slight rough idle good , by the way your repair is good you dont want a identified misfire, Lets start by what it is not. Not a misposition sparkplug wire you would of gotten that cylinder code, as misfire, Oh try this got carburator cleaner? spray safely along the intake gasket, How about inspecting the vacuum hoses especailly at the map sensor. Here the thing you got. a vacuun leak. on a 5.7 a vacuum leak causes random misfire, by definition P0300 means 2 cylinders or more. By experience its a vacuum leak

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1 Answer

Code p1313 p1316 p1111 p0301 means what?


Odd one this to have P1111 as well.

According to my data P1111 is all dtc checks compleated, http://www.bluejag.co.uk however some websites show it as a Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage, I'm fairly sure that the latter is incorrect.

check the basics first plugs, leads, corroded ground connections etc then its a bit of a guessing game


As for the other codes

P0301 = Misfire detected - cylinder 1
P1313 = Misfire rate catalyst damage - bank 1
P1316 = Misfire excess emission


Possible causes (as per JTIS):

Cylinder compression low
Worn camshaft / broken valve spring(s)
Fuel delivery pressure (low / high)
Fuel injector(s) restricted / leaking
Fuel injector(s) continuously open
Fuel contamination
Fuel injector circuit fault(s)
(Injector DTCs also flagged)
Spark plug failure / fouled / incorrect gap
ECM to ignition coil primary circuit fault
(Cylinder misfire detected DTC also
flagged)
Ignition coil failure

hope this helps

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2000 Ford Tuarus 130K P0301 misfire on one. I changed Coil pack,Plugs, wires, fuel pump, fuel filter,PCV, all OEM. P0301 went away but then got a P0300 the next day. not sure what to do now.. need help. I...


Hi there,
Have you tried vacuum leak test?
You have already changed the most common problematic parts for your code.
What you would need is a common shop propane torch.
How you use.
1. Start your engine.
2.now take the propane torch (Don't light it!!!) crack open the valve.
3. point the valve at each vacuum fitting on the intake manifold.
what your doing is if there is a leak, the propane will be sucked into it.
This will cause the ideal to rise. When it rises you have found your leak.
Also check where the intake meets the head.
If you have a leak it will cause the effected cylinder to run very lean (to much air to fuel mixture) and cause your misfired cylinder.
I hope this help. Give feed back if this helps anyone. Fixya

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You will get the P0301-P0304 codes on your OBDC reader when you plug it in (if actually errors), but will only find the P1399 if you select Honda as the manufacturer.

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