starts,runs ruff,smooths out, 3-5sec. quits.touch throttle,quits. wants to run but can't. any ideers?
any HELP would be greatly apreciated!
dissalusioned gm lover

 

Must be from Connecticut. There are two items that cause the short run on a regular basis.

First is the stock Multec injectors. If the engine has Multec injectors trash them for some decent Bosch injectors.

The second item is the ignition module, pickup coil, or spark coil (in that order).

But if the original or even replacement Multec injectors are in place. I'd trash those for Bosch before even checking anything else.

RBob.

 

hey Rbob, the 'mechanic' that worked on the car before it was sent to me,replaced the injectors (don't know what brand)and supposedly did a major tune-up.the first thing I found was the distributor firing order was waaaay off,also the pick-up coil looked cooked to me but checked out on the ohm meter.I'm thinki'n that is probobly it.I'll keep ya posted,this aint over yet!
thank you for your reply!,rory

 

 

also RBob, the vats ign. key was replaced with a non resister key.the other mech. said he by passed the vats, I don't think so.
gonna check to. would the wrong key (no resister) make it act like this or would it just have no fire? thanx for any help, R

 

RBob, did I scare you off with my computator ignance?
sorry, 'working on that.What you think 'bout the vats key sitch?
can the bird start and stop with the wrong ign. key?
thanx, computer forum illiterate!

 

Firing order always throws folks. Mostly because the #1 plug is passenger side front. Then 1-2-3-4-5-6

With VATs, usually the engine won't even start. So it may have been bypassed. Look for either a different PROM in the ECM or for a VATs bypass module near the ECM.

I would check the injectors to see which ones were used, along with the flow rating. If they put Multec's back in... (I've seen it done). Checking the fuel pressure is also a good idea.

RBob.

 

hey RBob, thank you for the info! I'll check into this some more.
I've got the timing rite, for most of us "old schoolers" finding the left bank to be no.1 cylinder is wierd also 123456 but I got that part. That's why I'm questioning every thing the other guy did, hmmm. I'll be in touch if you don't mind. Thax again! R

 

Hello RBob, are you familliar with the 89 chevy 350 tbi motors?
gotta another project killing me. This one is my brothers' vehicle,you mite have read my other thread. If you are intrested
please let me know. This one is personal!I mean if you have the time. thaNx again MR. guru, good job! R

 

hey RBob, I ment right bank. Anyway timing is'nt the prob.
still working on the bird. Any thoughte on the 350 chevy? I'll give you the complete rundown of everything I've done,once again if you have the time thanx!. R