2009 traverse no spark on 3-6 cylinders after major work.
2009 Chevrolet Traverse

2009 Traverse no spark on 3-6 cylinders after major work.

(2009 Chevrolet Traverse)
I have a 2009 Traverse that has been throwing the dreaded timing code and cylinder misfire. The wife drove it to work and ran good but on the way home it was running rough and she said it smelled like something burning.Got it home and found #4 coil pack burned up and when it was removed it fell apart. I installed new coil pack and still running rough. So I changed out all 3 timing chains and followed the video and still same thing. I said I may have missed something so I took it apart and did it all over again and same thing. Took to Chevy dealer and 4 days in the shop and they said low compression on all cylinder(60psi)..... I didn’t believe that so I ran the test myself and I’m getting 140-157on all 6 cylinders. I ran a spark Check and I’m getting spark on 1 & 2 cylinder but nothing on 3-6, I verified the coil packs are good but did that melted coil pack cause the ecm to go out? I’m not going to start throwing parts at to see if it fixes it and I verified all wire connections are go.
How long have you had this problem? 4 weeks
Tags: chevrolet, traverse
1 answer & 3 comments
Popular Answer
on November 08, 2019

You’ll need to test the ignition coil primary circuits which is pcm controlled - I can’t type out the entire procedure here as it is just too lengthy to do so in practically..

You’ll be testing for battery voltage and ground pulse from pcm on the coil wire connector.

Additionally there should be diagnostic trouble codes stored.
Sign in to reply
on November 08, 2019

ASSUMING coils are indeed functional:

I’m not certain where the crankshaft position sensor reluctor is located - is it possible it was damaged at all during timing chain replacement?

Nevertheless - primary circuit testing is first step .. ASSUMING coils are indeed functional !

Good luck!
on November 08, 2019
How would I go at testing those circuits if you dont mind telling me. I did replace the crankshaft position sensor to no luck. I also ordered a used ecm and should be here in a few days. Battery voltage is 13.48 volts. I think it might be something wrong with the fuse box but my gut is saying no because I'm loosing spark on cylinder 3 through 6 but not on 1 and 2. I will try to test the coils again with all 6 spark plugs installed on the coils to be safe. Thanks again for all your help as this is a very tough call and how the dealer let me down. I guess if you want done right do it yourself!!
on November 08, 2019

You’ll need a wiring schematic for primary coil circuit testing.

Move the non firing coils to the know good cylinder (1 or 2) for coil testing - if it fires there - then test primary - if it still doesn’t fire - the coil is bad.


Yeah I have no idea what the dealership mechanic was thinking - hell the engine can’t even run on 60 psi compression - minimum is 90 !
Oil Leak Diagnosis
$88 - $111 Learn More
on November 08, 2019

You’ll need to test the ignition coil primary circuits which is pcm controlled - I can’t type out the entire procedure here as it is just too lengthy to do so in practically..

You’ll be testing for battery voltage and ground pulse from pcm on the coil wire connector.

Additionally there should be diagnostic trouble codes stored.
Sign in to reply
on November 08, 2019

ASSUMING coils are indeed functional:

I’m not certain where the crankshaft position sensor reluctor is located - is it possible it was damaged at all during timing chain replacement?

Nevertheless - primary circuit testing is first step .. ASSUMING coils are indeed functional !

Good luck!
on November 08, 2019
How would I go at testing those circuits if you dont mind telling me. I did replace the crankshaft position sensor to no luck. I also ordered a used ecm and should be here in a few days. Battery voltage is 13.48 volts. I think it might be something wrong with the fuse box but my gut is saying no because I'm loosing spark on cylinder 3 through 6 but not on 1 and 2. I will try to test the coils again with all 6 spark plugs installed on the coils to be safe. Thanks again for all your help as this is a very tough call and how the dealer let me down. I guess if you want done right do it yourself!!
on November 08, 2019

You’ll need a wiring schematic for primary coil circuit testing.

Move the non firing coils to the know good cylinder (1 or 2) for coil testing - if it fires there - then test primary - if it still doesn’t fire - the coil is bad.


Yeah I have no idea what the dealership mechanic was thinking - hell the engine can’t even run on 60 psi compression - minimum is 90 !

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
My 2009 chevy traverse has had problem after problem. now it is only misfiring on 2 of the back cylinders 3&5 i...
I checked the fuse it was all good the light comes on for the rear air and heat no blower noise at all