91 2500HD Pickup Idle Problem.
July 2nd, 2009, 5:45 PM
#1
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91 2500HD Pickup Idle Problem.
Hey, I have a Chevy truck with a 350/5.7L in it and it is Throttle Body Injected and it has no ***** anymore and it idles ****ty and at about 1100 rpms it bogs and almost wants to stall. The acceleration is terrible the trans shifts with the correct rpms but I have to pretty much punch it to go anywhere.
I replaced:
TPS (Throttle Position Sensor)
Distributor, Cap/Rotor
Cleaned the Throttle Body
PCV Valve
Fuel Filter
Plugs
Wires
and I also did the timing.
The only thing I think it could be is a worn timing chain but I don't know any of the symptoms of that.
Does anyone know what my problem might be and how to fix this? I would be much appreciated.. thanks in advance. =)
I replaced:
TPS (Throttle Position Sensor)
Distributor, Cap/Rotor
Cleaned the Throttle Body
PCV Valve
Fuel Filter
Plugs
Wires
and I also did the timing.
The only thing I think it could be is a worn timing chain but I don't know any of the symptoms of that.
Does anyone know what my problem might be and how to fix this? I would be much appreciated.. thanks in advance. =)
July 2nd, 2009, 6:34 PM
#4
Super Moderator
You put a timing light on it already? If so how much was it jumping? Another thing you could check is the lift on each of your rockers to see if your cam is worn out.
July 2nd, 2009, 6:38 PM
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Yeah, I the timing light and moved it to top dead center. I did advance it a little before but now that it is top dead center it seems like its running a little ****tier. The line was jumping probably a 1/4 inch at most.
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July 2nd, 2009, 6:57 PM
#8
Super Moderator
Thats why you are doing nothing to the timing without unplugging this!! Do this turn truck off unplug the wire in the picture below. Start truck adjust timing to 0 degrees BTDC! Tighten distributor recheck to make sure it did'nt move! Turn truck off unplug battery to clear check engine light, plug timing bypass wire back in, replug battery in then see how it runs! Got it?
