Question about 2004 Chevrolet TrailBlazer

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Had a misfire code & speed sensor code (P001 /P003) service engine lights flashes... had spark plugs replaced; problem got worse! press gas pedal no power although truck moves no real power or acceleration (04 chevy trailblazer LT) smoke from exhaust, once sparks, cruise control does not work

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  • at first I used autolite .... as soon as I changed back to ac delco the power problem went away. but there was oil found around one spark plug (leak / but where?) and a misfire on cylinder 2 only. wow

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6ya6ya
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Posted on Jan 02, 2017

  • 366 Answers

SOURCE: TRAILBLAZER 04 LT DRIVER SIDE HEATED SEAT IS NOT

its more likely its a broken heating wire inside the seat, test the connector under the seat for voltage on the side going to the battery, and the one going to the seat for ohms, if power is present but the resistance is too high to be measured its a broken heating wire, only fixable by completely destroying the upholstery, but if no power is present its possible a fuse,wire or connection somewhere, usually the fuse block is on the driver side near the door (look for a panel that is either marked fuse, or easily pulled off) could be on the side of the dashboard,

Posted on Jan 19, 2010

  • 1 Answer

SOURCE: 2002 Chevy TrailBlazer Service Engine

This one is easy. The clutch fan is not disengaging. Mine does the same thing after it has idled a while but then will release (wind noise stops) after getting up to speed.

Posted on Sep 02, 2008

  • 19 Answers

SOURCE: S10 pickup misifirng when light highway load

I had to rebuild my engine at 97000 miles cuz of low engine oil pressure and bad berrings

Posted on Jan 09, 2009

csmock132
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SOURCE: 98 chevy 1500 4.3L vortec misfire problem

These have a real problem with the distributor caps, i would try that

Posted on Mar 02, 2009

  • 1 Answer

SOURCE: I need to replace Accelerator Pedal position Sensor

there is two little nuts on the bottom of the pedal itself just loosen the nuts and it comes right off.

Posted on Apr 29, 2009

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3 Answers

P0303 Flashing Service Engine Light when driving


The code means a misfire on #3 cylinder .i would change the spark pluges wires if it has any.may also be a bad coil or coil pack.


Jan 27, 2015 | 2002 Nissan Pathfinder

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My 1996 Taurus when I press the gas pedal when cold it sputters and lacks power. When it warms up it runs great.


Possible causes - Faulty spark plug 5
- Clogged or faulty fuel injector 5
- Faulty ignition coil 5
- Fuel injector 5 harness is open or shorted
- Fuel injector 5 circuit poor electrical connection
- Ignition coil 5 harness is open or shorted
- Ignition coil 5 circuit poor electrical connection
- Insufficient cylinder 5 compression
- Incorrect fuel pressure
- Intake air leak

The P0305 code means that the cylinder 5 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 5. If the problem persist more tests needs to be done to diagnose problem, see "Possible Causes



When is the code detected? Engine Cylinder 5 is Misfiring.


When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.



Oct 21, 2014 | 1996 Ford Taurus

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2007 Pontiac G6 my engine light recently came on, I noticed that when I go to accelerate my engine sounds like it slipping or at trying to accelerate, but my cars go now were? Any suggestion? And to a


This sounds like a transmission problem. I would take this into someplace like an Aamco. Have them do a diagnostic for 80 bucks to eliminate that or get it fixed while it is still cheaper to do.

Apr 20, 2014 | 2007 Pontiac G6

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My H2 Hummer had a computet code P003 misfire on cylinder 3.I switched the spark plug wires around now Im getting a computer code P001 multiple misfires


check engine control fuse and then switch the coil packs around again. Rescan, and see what you get. Then switch to different coils again and rescan.
Mine was a combination of a blown engine control fuse and one bad coil.
My friend had the same, but it was 2 bad plugs and one bad coil.

Jan 20, 2013 | 2005 Hummer H2

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2002 Sable sedan choke/missing/sputtering intermittent


The PO 316 is still misfires om first 1000 revolutions
so the shop did a poor job for you on resolveing the
cylinder misfires

Try a diffferent shop

Have to clean the MAF Sensor & replace upstream
oxygen sensors if over 100,000 miles

Need the correct oem spark spark plugs/any brand

No reason the gas filter should be clogged unless it was in
the car for 10 years

Fuel pressure should be checked

Need to check for cylinder misfires on a road test of 20
miles or more with professional software in Mode#06

Jan 17, 2013 | 2002 Mercury Sable

1 Answer

Hesitation while idling and stalling at times when not pressing the gas pedal. Codes PO 171 & PO 174 came up on my friends computer.


Lean O2 Sensor Codes for both banks or sides

If they have 100,000 miles on them, change them
Only the 2 closest to the engine,not the rear monitors

Other wise check for vacuum leaks & misfires

Clean MAF Sensor & Throttle Plate

New Spark Plugs -- nothing fancy, double platinium
OEM Style. NGK are good & oem on some fords

Jul 16, 2011 | Ford Taurus Cars & Trucks

2 Answers

97 ford escort check engine light flashing uses alot of gas replaced plugs


what engine if a zetec engine then change the O2 sensor

May 06, 2011 | 1999 Ford Escort

2 Answers

2002 ford escape 3.0L DTC P0305and P0306 what would you ck


P0305 - Cylinder 5 Misfire Detected
P0306 - Cylinder 6 Misfire Detected

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, The Powertrain Control Module (PCM) or Electronic Control Module (ECM) can determine that a misfire is occurring.

When is the code detected?
- Engine Cylinder #5 and #6 is Misfiring.

Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation

Possible Causes:
- Improper spark plug at cylinder #5 and #6
- Insufficient compression at cylinder #5 and #6
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #5 and #6
- Fuel injector #5 and #6 may be faulty
- Intake air leak at cyli

Possible Solution:
- Perform Injector Service
- Replaced Spark Plug #5 and #6
- Replaced Injector #5 and #6
- Replaced Ignition Coil #5 and #6

Hope helps.

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You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.

Feb 22, 2009 | 2002 Jeep Grand Cherokee

1 Answer

99 TL engine roars and shakes when pressing on gas.


a flashing chack engine light means you have a catalyst damaging misfire the tcs light comes on because this system will not function with certain codes stored for the engine or trans. knowing that you have a misfire you very well could have a bent valve the question is why. have someone check the engine timing incase the timing belt tensioner has failed. i have seen this happen on the 3.2 before or a burnt exhaust valve . as far as the distributor goes the 99 tl does not have one it has cop (coil on plug ignition) . this means you have a seperate coil on top of every plug one of these could have failed check the code to see if the problem is isolated to 1 cylinder rhen start looking at that one and you better hurry that light flashing means you will damage the catalitic converter if the car continues to skip good luck and i hope this helps you.

Dec 22, 2008 | 1999 Acura TL

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