jaz21

Need some help, I recently swapped in a 90' 5.0 motor into a 92' chassis. I am using a 92' 5.0 main harness, 91' 5.0 front harness and the stock 4cyl. dash harness. Also using 91' 5.0 computer.

Problems are:

Motor will only stay on if I continue to pump the throttle.

I don't have any of the exhaust on, only the headers, would this cause the motor to die off throttle?

Ive replaced the spark plug wires and the spark plugs and still nothing


Any help is appreciated.

89gtwith3.55s

your gonna burn out your valves without back pressure...

fordboy5.0

is it throwin a code

mjr46

no he won't , how many open header guys at the track burn valves from that??? exactly.................

jaz21

can it also be the vacuum lines that make it die or does the computer have to adjust to the motor cuz after while of pumping the throttle it stays on but with a rough idle.

James88GT

my car does the same thing and i adjusted the throttle. after driveing the car it would idle just fine. that was just my car tho. could b cold blooded too.