I have a 94 LT1. It has a LT1 Hot Cam, ported heads, ported intake and car is stalling. Just replaced optispark and injectors. I checked intake and it's not leaking. When I excelerate it bogs and the brakes have no pressure (brakes been bleedend). At high RPM's it sounds good, but the car doesn't run correctly. Would anyone be able to tell me what the problem may be.

 

it sounds like you hav a vacuum leak...since youre losing brake pressure, and i think the MC is vacuum boosted...than i would check around for a leak of some sorts...

 

I've been dealing with same problem for quite a while now.
I've been getting a different answer from a number of people. So far I've changed the opti, the coil and the ignition module. My next step is the PCM which surprisingly is less than $200.00 (re-manufactured and unprogramed). I'll start looking for a vacum leak as well.
Seem's alot of us are dealing with this crap and nobody has an answer yet. Let me know how you make out.

J.D. Prestage

 

I agree with Patrick. the brake booster is vacuum assisted. Without hearing the motor I can only guess. I would check 1. timing 2. for a hot spark.3 fuel pressure.I have heard many times from people that know alot more then me about motors . A big cam makes less vacuum. thats why alot of racers do not use vacuum assisted brakes . I was a pit crew member for a guy with a superlate model roundtrack car. He has the best of everything on it . $20.000 motor the best brakes money can buy and he can't use a vacuum assist. I think he is running like a 602 lift roller cam.