Sputtering!!
10-21-2009, 07:43 PM
#1
Contributing Member
Thread Starter
Join Date: Oct 2004
Location: JACKSON
Posts: 1,263
Likes: 0
Received 0 Likes
on
0 Posts
Sputtering!!
Truck exhaust sputters at idle, only when the engine is warmed up and operating at normal temp. I am guessing something with the AFM - the engine has new plugs, air filter and a clean throttle body.
http://s53.photobucket.com/albums/g7...P1000508-1.flv
http://s53.photobucket.com/albums/g7...P1000508-1.flv
10-23-2009, 03:05 PM
#2
Registered User
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes
on
4 Posts
Grab a timing light and see if the timing is bouncing around (jumper the diagnostic plug as if you were going to set the timing too). If it is, your timing chain may be stretched too far for the tensioner to take up the slack.
10-23-2009, 05:21 PM
#3
Contributing Member
Thread Starter
Join Date: Oct 2004
Location: JACKSON
Posts: 1,263
Likes: 0
Received 0 Likes
on
0 Posts
thanks abecedarian, I will check the timing chain. If it is streched does that mean it needs to be replaced, or can it be tightened with the tensioner? I know the replacement is a pretty lengthy process.
Last edited by GodwinAustin; 10-23-2009 at 05:31 PM.
Trending Topics
10-26-2009, 01:38 PM
#8
Contributing Member
Thread Starter
Join Date: Oct 2004
Location: JACKSON
Posts: 1,263
Likes: 0
Received 0 Likes
on
0 Posts
Is there a way to lubricate this with seafoam/etc in the crankcase or vaccum system or is it clearance issue?
Could it be anything besides the sticky valve, a timing issue possibly as abecedarian suggested?
The truck runs great under acceleration or at anything above idle. Why is this only happening at idle?
Last edited by GodwinAustin; 10-26-2009 at 01:41 PM.
10-26-2009, 03:21 PM
#9
Registered User
Join Date: Feb 2008
Location: the great Maine wilderness
Posts: 2,048
Likes: 0
Received 4 Likes
on
4 Posts
about the only way there can be any suction at the tailpipe, is if an exhaust valve is not fully closing, or exhaust valves... so yes...it could be timing, but I'd think it would run pretty terrible if all 6 cyl's were sucking exhaust.
Seafoam may help... Adding some atf to your crank could help if its a sticking valve.... if its a burn velve, or a valve('s) out of adjustment tho... it will need to be fixed right.
I would start with a compression test, then decide where to go from there.
Seafoam may help... Adding some atf to your crank could help if its a sticking valve.... if its a burn velve, or a valve('s) out of adjustment tho... it will need to be fixed right.
I would start with a compression test, then decide where to go from there.
10-26-2009, 05:22 PM
#10
Just a thought in a different direction my truck with the 22re sounded just like that and since you said the throttle body is cleaned I'm assuming you cleaned it recently? If that assumption is correct then your problem might be similar to the one i had last week. I recently cleaned my throttle body and didn't remove the tps, stupid but i had no clue at the time. Shortly after i cleaned the TB my truck idled just like yours and sputtered and spit throughout the rpm range. This is on a newer motor and i couldn't for the life of me figure it out. Turned out that the tps was malfunctioning and when replaced solved my problem. Check out 4crawler's page on testing the tps it might shed some light on your situation and its free to just check something like the tps all you need is a ohmeter.
Thread
Thread Starter
Forum
Replies
Last Post
