89 grand prix turbo
Hello everyone. I'm new here and I need advice on a 1989 pontiac grand prix turbo 3.1 engine
it has a hesitation when just starting to push throttle down and it acts like it is starving for fuel at mid throttle, but if i push the throttle on down it runs ok. I have replaced all of the following with new parts.
1. all new injectors
2. all new sensors - coolant, o2, crank, air temp, temp sensor for dash
gage , map sensor, throttle position sensor, & knock sensor.
3. new coils
4. new ignition module
5. new plugs
6. new plug wires
7. new thermostat
8. new computer
9. new prom
10. new fuel filter
all parts were bought from NAPA
i unhooked the cat to see if it was plugged. It is not I forgot to add that the fuel pressure holds at 40 psi while idleing
I am out of ideas. Can someone help me with it? Thanks in advance
it has a hesitation when just starting to push throttle down and it acts like it is starving for fuel at mid throttle, but if i push the throttle on down it runs ok. I have replaced all of the following with new parts.
1. all new injectors
2. all new sensors - coolant, o2, crank, air temp, temp sensor for dash
gage , map sensor, throttle position sensor, & knock sensor.
3. new coils
4. new ignition module
5. new plugs
6. new plug wires
7. new thermostat
8. new computer
9. new prom
10. new fuel filter
all parts were bought from NAPA
i unhooked the cat to see if it was plugged. It is not I forgot to add that the fuel pressure holds at 40 psi while idleing
I am out of ideas. Can someone help me with it? Thanks in advance