MAP = Manifold Air Pressure
MAF = Mass Air Flow

These cannot be interchanged, but if you need help, try www.gm-trucks.com

Lots of good people there to help.

 

Well steve what's the diagnoses so far?
Is juniors truck up and runnin?

 

my roomate had a similar problem, we changed all of those things too with no effect but just on a whim, i replaced the cap and rotor and cured everything even though there wan nothing really visably wrong with them

 

nope, havent gotten back to it since Monday... talked with an expert today and apparently there was 1 controller for the timing we missed... knock sensor is the input to it and it would control the timing. We're going to look at it tomorrow morning assuming I'm back to normal... (sick with a flu of some sort).

 

Welcome to DF Dodgetrucker...

cap & rotor got swapped out earlier in the debug process...

 

Ok , maybe I can help here since I drove 2 chevy trucks from 1990 to 2007 when I bought the CTD MegaCab. The chevys are gone and I dont miss them.
I had a problem like that with one of my trucks and had to take it to the stealer. They went through all the things your going through now. They even put a new distributor in it. Nothing helped. They ended up finding that the ground wire for the distributor kept losing ground .
The wire runs right next to the driver side valve cover to the front of the head and bolts to the intake or thermostat housing. It would have ground then when you would start the truck and get going it would loose ground. They moved it over one bolt on the intake to get a good ground and all my problems went away ( and so did my $750).
Hope that helps ya.
I know alot about those 90's chevys- they all seem to have the same problems at some point- I will try to help you if I can.
Good Luck
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If it was a bad ground, wouldn't it run like crap all of the time?

 

well we checked all the grounds, wiring back to the pcm & swapped out the pcm with a known good one... (just to add to what we did earlier...)

tonight we yanked out the dist to change the pickup coil and the pickups in the dist were broken & cracked... 1 of them we found under the distributor and another broke off when we yanked the distributor... we'll be getting one tomorrow to swap in... I'll let you guys know how it goes.

thanks for all the input!!

 

I told ya it might have been the the pick up coil.
A buddy had a problem similar and it was sounding like you were goin the same route he was.
So how's it runnin now?

 

it was the actual pickups on the distributor and not the coil. it's running awesome now, no complaints. we picked up a used distributor for $45 bux and had Jr drop it in, fired right up.

thanks for all the input! it is what makes forums so awesome. you can find someone who has experience in just about anything out there...