bad stutter at 2000 rpm, only power key on

[Spanky1965]

yes they were warm, not real hot, here is the strange part was running perfect on normal power before today, now after all this it runs like crap all the time, sounds like runing on 6 or 7 cyl???

[tomtom72]

While it's running badly did you notice if it got worse the longer it ran?

Also, while running badly, did you notice how the exhaust smelt? Rich, or lean?

I'm asking because if the injector coils are suspect their performance degrades with heat & time, and if they shut down you sometimes can smell the lean (or rich condition if they're stuck open) at the tail pipes.


Tom

[Ccmano]

This thread is becomming painful to read. Time to pull the plenum and replace the injectors. If it's a 90' with original injectors they will need to be replaced anyway, it's just a matter of time. I'd bet money it's the secondary injectors. I had exactly the same issue (bad studder key on only) Put in a set of Accels, problem fixed. You want 21lb injectors, AtlanticSpeed.com has them, about $550 a set of 16. I'll bet if you ohm the injectors directly you find at least one bad one.
H

[Spanky1965]

well thats what I was thinking, but I was thinking I should change coils also, but my concern is could it be a bad comp?

[Dynomite]

Originally Posted by Spanky1965

well thats what I was thinking, but I was thinking I should change coils also, but my concern is could it be a bad comp?

I have been following this thread and learning from Jeffvette and others

I found one bad primary injector on my 1991 so pulled the plenum, injector housings, cam covers, starter, and about everything else on the top end

I will replace coils, injectors, plug wires, plugs, maybe some vacuum connectors. Jeffvette will powder coat and port injector housing and plenum Everything under the cam covers looked in great shape with minor wear. Now to find all the parts and figure out where they go when I reassemble. Good ole Marie Calendars pie pans worked great for individual sets of bolts and parts

Best of all was limey providing that ingenious suggestion of removing the drivers side engine mount nut and jacking the engine up on drivers side to remove drivers side cam cover torx bolts

[Ccmano]

"well thats what I was thinking, but I was thinking I should change coils also, but my concern is could it be a bad comp? "

If your going to the trouble of pulling the plenum to change the injectors you might as well change out the coils and wires, replace the pvc valves and hoses, replace the breather box elbows and replace the breather box gasket (the bolts will be loose). It's a 20yr old car after all. Beats having to go back and do that again and again.
H

[Spanky1965]

Ok guys I am about to give up, anyone want to fly to Springfield Missouri and fix this thing? I will pay

Originally Posted by Spanky1965

Ok guys I am about to give up, anyone want to fly to Springfield Missouri and fix this thing? I will pay

[Spanky1965]

Jeff how do I contact you?

Sending PM.