Service Traction Control - Stabilitrak and ABS light, Help
April 10th, 2013, 10:38 AM
#31
CF Beginner
Join Date: Apr 2013
Location: Dallas Pa
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
stabiltrak and traction control service light along with cyl. 1 misfire
I have a 2008 Suburban and while driving home from NY my stabiltrak and traction control light came on. when I pulled over to investigate i noticed a miss at low RPM. now the engine idles just under 500. When I got home I investigated some causes on this site I also got some codes read I show p0442, p0449,p0455,p0301,and p0521. So I tried swapping coil pak with 1&3 cylinder still no good. I have no compression on number 1 cylinder. Drained oil and out a flush through it and fresh oil. I'm thinking #1 cylinder is stuck in the AFM mode. any ideas on direction to take?
Charlie
Charlie
April 10th, 2013, 4:50 PM
#32
Administrator
cz113 Welcome to the forum...
Sounds like one (or more) of the AFM lifters has failed... typically there has been damage to the cam shaft when the failure occurs, but you never know you might get lucky... I'd get the head pulled off and have the cam checked...
I am not sure what the process is that the dealer follows for repairs but I would suspect that replacement of all the AFM lifters(or all lifters) and the cam shaft is in order...
Sounds like one (or more) of the AFM lifters has failed... typically there has been damage to the cam shaft when the failure occurs, but you never know you might get lucky... I'd get the head pulled off and have the cam checked...
I am not sure what the process is that the dealer follows for repairs but I would suspect that replacement of all the AFM lifters(or all lifters) and the cam shaft is in order...
April 11th, 2013, 8:34 AM
#33
CF Beginner
Join Date: Apr 2013
Location: Dallas Pa
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Thank You in2pro, I suspected that the lifter was stuck just not sure if it is the solenoid for that cylinder or the lifter itself. I will have to tear it down, I should be able to test the solenoids before I actually pull the head. I believe that is under the intake?
April 21st, 2013, 7:15 AM
#35
CF Beginner
Join Date: Apr 2013
Location: Dallas Pa
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
pulled the intake off and the LOMA along with the valve cover. the first valve assy does not move at all when turning the engine over by hand. it looks like the head needs to come off to replace lifter.
Chaz
Chaz
April 21st, 2013, 10:12 AM
#38
Administrator
April 26th, 2013, 6:37 AM
#39
CF Beginner
Join Date: Apr 2013
Location: Dallas Pa
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Well found the culprit for my misfire problem, i put a photo in photo album call AFM Lifter on this site not sure how to post a photo in the thread. The small pins were stuck in on the lifter and it came out in two pieces, I freed them up but replaced the lifters in the affected head.
Chaz
Chaz