PainIstruth8

My mustang is running, it seems slow as hell. If I floor it... the car kicks back but then gains no speed at all. Any ideas?

AdderMk2

mods? things you have tried to do to fix it? is the CEL on?

we need a bit more info that what you have given

PainIstruth8

Car info:
1990 Mustang GT 5.0, AOD
Kenne Bell supercharger 6psi
K&N filter charger
Cervini's ram air hood + intake kit
BBK headers
Flowmaster exhaust

Work recently done:
Replaced head gasket
Added supercharger
Changed driverside valve cover back to stock to fit supercharger

It'll drive in low RPMs, if I put it in 1st and try to drive it wont go past 45 into high rpms no more then 3000.
If I put my foot down in drive... it kicksthe car back like its gonna go... but doesnt do a thing.
Overall the car seems to be lacking the power it truely has driven at low RPM

NotchAbove

Sounds like the distributor is off, and hence the timing is off, and you are running retarded ignition.

PainIstruth8

Timing is retarded 10degrees due to the supercharger. Might be 4 degrees too excesive due to only 6psi but the car will stall and barely start if I have it at 6 degrees

Also the motor was pressure checked and its good.

NotchAbove

Ok, if I understand what your saying your running timing at -10, to state it simply. That is not going to work if that is what your saying.

For a naturally aspirated car, the stock base timing is advanced 10 degrees. Most guys can run 16-20 on premium fuel.

So if I were you I would set it to at least 8 advanced.