Got the new motor in my car. Runs great. My only issue is, if I decelerate then push in the clutch, the car stalls. But if I gas it before pushing in the clutch, it won't, it'll just go down to idle. Any ideas on what's wrong?


1994 Pontiac Trans Am 6-speed
Vortech V1 @ 7psi, Eagle rods, Low compression pistons, Comp Cam, Ported Heads, Roller Rockers, Ported Intake Manifold, Holley 58mm TB, 42# Injectors, MSD Optispark, MSD Coil, F.A.S.T ECU, Crane Cams Ignition, Mid-length headers catless, Hurst shifter, Adjustable panhard bar, ZR1 wheels. She gets the job done.

I had a similar problem when I covered a vacuum port on my intake manifold that wasn't covered before. I disconnected my battery and reconnected after 10 minutes and it seemed to fix the problem. I'm not a guru of engine management systems, but I figured it couldn't hurt.

Which vaccum port?


1994 Pontiac Trans Am 6-speed
Vortech V1 @ 7psi, Eagle rods, Low compression pistons, Comp Cam, Ported Heads, Roller Rockers, Ported Intake Manifold, Holley 58mm TB, 42# Injectors, MSD Optispark, MSD Coil, F.A.S.T ECU, Crane Cams Ignition, Mid-length headers catless, Hurst shifter, Adjustable panhard bar, ZR1 wheels. She gets the job done.

what car is this? a jbody or the car in your sig?

if its a boosted j, i would check your tune. does it have a light weight flywheel? If the tune is off it will drop down too low once the clutch goes in and stalls. So the idle needs to be bumped up and what not.

My car did that when my vss wend bad in my 2000 z24. Replaced the VSS and it was perfect.




On the inside my car looks like a fighter jet.

Its not for the car in my sig. Its my 95 cavalier
I couldn't seem to find the plug for the sensor on the trans for my speedometer. Would not having this plugged in cause the problem?