1987 Turbo 100% stock except for updated muffler and cone air filter.
Items replaced: CHTS, timing kit, BA fuel pressure regulator with sensor built in, W255 fuel pump.
Symptoms: About 50% of the time full throttle does not provide normal turbo acceleration. It seems that there is a sweet spot in the gas pedal that the car likes, somewhere in the 1/4 to 1/2 pedal travel range. If I push full throttle, a lot of the time it will not pull hard even though the boost gauge shows normal boost. When this happens, letting off the throttle to find the sweet spot will make the car achieve full acceleration. Keep in mind the boost gauge shows full boost whether the car is accelerating normal or not, so its not like the turbo is not working 1/2 the time.
Furthermore, the car is very "wheezy" after 4300 rpms+/- and does not really do much. The power band is 2800-4000 +/-.
Any ideas? My first thought is TPS, but after reading many posts here the Zcar TPS does not do much unlike other TPS's in other cars.
Thanks for any ideas.
EDIT: After replacing the CHTS and fuel pressure regulator, there are no codes in the ECU.
Items replaced: CHTS, timing kit, BA fuel pressure regulator with sensor built in, W255 fuel pump.
Symptoms: About 50% of the time full throttle does not provide normal turbo acceleration. It seems that there is a sweet spot in the gas pedal that the car likes, somewhere in the 1/4 to 1/2 pedal travel range. If I push full throttle, a lot of the time it will not pull hard even though the boost gauge shows normal boost. When this happens, letting off the throttle to find the sweet spot will make the car achieve full acceleration. Keep in mind the boost gauge shows full boost whether the car is accelerating normal or not, so its not like the turbo is not working 1/2 the time.
Furthermore, the car is very "wheezy" after 4300 rpms+/- and does not really do much. The power band is 2800-4000 +/-.
Any ideas? My first thought is TPS, but after reading many posts here the Zcar TPS does not do much unlike other TPS's in other cars.
Thanks for any ideas.
EDIT: After replacing the CHTS and fuel pressure regulator, there are no codes in the ECU.