Hi this is MATT. When you say "skips
Does it feel like an ignition miss?
it will go through but die if cruising
Does it cutt off?
no just kicks real bad like a chevy does at top rpm limiter
Have you ever changed sprak plugs or wires? Is the check engine light on? Any codes?
yes changed both and no lights or codes i put the truck in the shop and they made me replace dist. and tps and still no luck
Can you duplicate the miss, sitting still, with a power brake test? In gear, left foot on brake and rev it with right foot, putting a load on the engine?
yea it does it and sitn still and pulling boat out
if your on the gas it will go rite through that range but if you power up slow it does it
Okay, one possibility is clogged EGR ports, if some are clogged it can allow too much to the unclogged cylinder/s. Try disabling EGR and see what happens.
ill try that.
Just an idea, but let me know. Just unplug the vacuum line and plug it. I'll be waiting to hear from you.
k be a few
tryed that and no fix
Okay, let me think and see what I can come up with. Does it smooth out above 2000rpm's?
yea and before
Okay, so it's good at idle, then at around 2000 rpms it misses, then above it's good again. Clogged Egr really fit the description. Let me do some research and see what I can come up with. thanks
Is there anything else you can add that might help?
i think my truck is cali emissions
would the ecm have anything to do with it?
That would be the last resort. Try using carb. cleaner and spray around the intake looking for a vacuum leak? The most common problems for this are the distributor ( oil leaking onto the optical sensor), Clogged EGR ports, TPS, and intake manifold leaks. We are running out of ideas. But your problem may not be a common problem, that just makes it harder for us.
where did the dist. come from? new , used?
a new dist. the shop put it on.
try checking for intake leak, if no luck let me know. If I can't think of anything else for you, I'll relist your question, in hopes that another can help you. MATT
thanx you tried its driving me nuts
Can you find out if it was an aftermarket distributor? I seen people go thru a few before getting a good one. Hard to diagnose without a scope. MATT
they said it was stock
Okay, just checking , because I heard of problems with aftermarket distributors.