Please help

BULA1986

MEMBER
2004 CHEVROLET TRAILBLAZER
4.8L
6 CYL
4WD
AUTOMATIC
204,000 MILES

3 months ago we replaced the #2 coil. Due to unhooking the battery to fix the radio. It reset the PCM. So after cleaning the throttle body and replacing the coil it ran alot better even a little better. Well just the other day my fiancé ran outta gas and the truck died. So after all is said and done after jumping it. My car is doing the same exact things it was when the coil was bad. We went to auto zone to find out what coil is misfiring. 5 codes popped up: P0410/P0014/P0455/P0300/P0526: NO COIL CODE. We know everything that is popping up all ties together. But the real question is could it be a coil and its not popping up? And were should we start? Should we just do what we did with the first one? Because all the symptoms are exactly the same. Check engine light blinks on and off the whole time, chugging, sputtering, slow takeoff, low horse power, eating gas like crazy, vibrates when stopping and taking off high RPMs. Reminds me of a older truck the manual dulies. Makes the same sound. Help would be greatly appreciated.

4 Replies

JOHNNYT73

MECHANIC
924 POSTS

P0526 = cooling fan speed circuit
P0300 = Random/multiple misfire
P0455 = EVAP leak
P0014 = Camshaft position actuator solenoid.
P0410 = Secondary AIR injection

Ok, I would focus for now only on the P0014 code for the camshaft position actuator solenoid. If your oil is dirty or you haven't been on top of your oil changes the screens on that solenoid that the oil flows through, it will cause the type of symptoms you are having. You can either try first to just clean the screens with brake cleaner and see if that works, or you can replace with a new one. Which ever you do make sure you change the oil as well. I will post a video I found on youtube that better describes your issue.

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Thursday, January 28th, 2016 AT 8:20 PM

JOHNNYT73

MECHANIC
924 POSTS

Here is the video. You can go forward to 14:00 in the video to see the actuator and his description about the part. Hope it helps!
http://www.youtube.com/watch?v=GsgItRsAWZQ

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Thursday, January 28th, 2016 AT 8:21 PM

BULA1986

MEMBER
1 POST

I am a little bit behind on the oil change. Would getting the oil changed clean the screens automatically Or would it be better just to do it our self? We also checked the coil packs 1-3 so far its a lil cold out lol. Also I dont know if you know it but how come when the battery dies or is disconnected the PCM resets itself? And why would we get a misfire each time? So after I get all of this done do I have to reset the PCM manually? I don't want to bombard you with questions. Do you know how come the #4 fan speed eather dont work or works when it wants to? And my truck doesnt over heat or anything but it will not blow out hot heat its warm but its not nearly close to wear your warm when its cold out. In 2011 I had to replace the circuit that controlled that area due to that I had no Ac or heat. After it was fixed it worked just fine. Thank you or the quick response.?

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Thursday, January 28th, 2016 AT 10:42 PM

JOHNNYT73

MECHANIC
924 POSTS

Changing the oil may not help. I would take out the solenoid and clean it then change the oil. When you disconnect the battery it loses resets the memory in the pcm. It so runs poorly because the problem hasn't been corrected. I would check the fan after you correct your main issue with the idle.

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Friday, January 29th, 2016 AT 5:02 AM