HolsetGST
Probationary Member
- 25
- 2
- Jan 10, 2019
-
Orlando,
Florida
Hi guys I have been through days of google searching trying to pinpoint the issue i'm having and everything leads to a dead end with no answers. My car is 1997 GST with a H8 blackbox ecu, 1000cc id injectors,holset hx35, walbro 255 fuel pump, tomei AFPR and other mods such as big fmic. I took a chance and bought the car recently, previous owner said it needed a tune. After i got the car i changed out spark plugs to BR8es and taylor plug wires, then found a tuner from the central florida area where i live to come out and put a base tune. We tried for hours trying to get things dialed in and no matter what the car kept dumping fuel profusely creating black smoke, and the only way to have it running is with your foot on the gas otherwise it dies. I recently adjusted the AFPR to the lowest setting at 5PSI and thats the only way i got a somewhat decent idle, but still extremely rich and unable to rev smoothly, I did a boostleak test and found only one at the throttle body and fixed that in hopes that would rectify the problem which it did not. I hooked up a scanner to the car to get live data and found the front 02 sensor at 1.275 volts and the rear at .060v, the coolant sensor reads properly and also the tps at this point i dont know what could possibly be causing this issue.