Question about 2005 Chevrolet TrailBlazer

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2005 Chev Trailblazer running rough. Found #1 spark plug wet with fuel. Replaced it and same problem. Possible coil?

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Could be spark or it could be a leaking injector.

Posted on Mar 31, 2015

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Posted on Jan 02, 2017

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1 Answer

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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Apr 27, 2015 | 2005 Honda Odyssey

2 Answers

Replaced 2 coil packs and still running rough 2003 trailblazer


try replacing or cleaning the injectors
when misfiring moves around it is seldom the coils , plugs and any thing else connected to spark but dirty fuel, low fuel pressure and dirty injectors or injector control
use a quality injector cleaner for a few tankfills

Sep 02, 2012 | 2003 Chevrolet TrailBlazer

1 Answer

98 chev 3.1L runs rough and dies at idle


Check the DIS module or injectors. Check to make sure you have a spark on each cylinder. One cylinder could be misfiring

Mar 05, 2010 | 1998 Chevrolet Lumina

1 Answer

I have a 2005 Chev Trailblazer it is running rough when idling. It needs a tune up but I have no idea where to even find the spark plugs. Also it is whining really loud when I'm driving its not the power...


you have to take off top of plentum (big plastic piece on top of motor) you will see a round plastic thingy with plugs on them ,they are the coils (six if six cylinder) them them off and the plugs are underneath

Aug 23, 2009 | 2005 Chevrolet TrailBlazer

1 Answer

1988 chevy corsica 6 cyl suddenly running on 4


WET PLUD W/GOOD COMPRESSION IS USUALLY NO SPARK.YOUR ENGINE HAS 3 IGNITION COILS.EACH COIL CONTROLS 2 SPARK PLUGS.TRACE THE WIRES FROM THE BAD SPUGS BACK TO THE COILS .IF THEY ARE THE SAME COIL THEN U HAVE A BAD ONE OR CONTROL MODULE(UNDER COIL)

May 12, 2009 | 1988 Chevrolet Corsica

2 Answers

2002 chevy trailblazer has rough idle


it could be an o2 sensor. it could also just need a tune up

Mar 15, 2009 | 2002 Chevrolet TrailBlazer

1 Answer

Oil in spark plugs


Could mean a variety of things.....
Possible head gasket leak....(cheap fix if caught early)
Possible Worn piston rings
possible valve guide oil seals

Jan 12, 2009 | 2004 Chevrolet TrailBlazer

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