1988 Gl turbo wagon, stock except for Tdo4 w/hks down pipe and wrx intercooler.

Always had the hesitation issue mid rpm range( around 2-3k then cleared up)

But now after the modifications it runs poor. If you give it part throttle it runs ok, a bit rough idle, hesitation but seems ok in higher rpm. If you give half or more throttle it really chokes and takes a long time to rev up. The system was pressure tested and all leaks sealed. Any ideas? 02 sensor(wires had to be extended to fit downpipe),maf problem? P.S Where can you buy an aftermarket 02 sensor for this car? I need one that is 3wire.

I got another O2 sensore at Napa. I think it was a universal one, pretty easy to do the wiring on it.

sounds a lot like what my rx did before i installed the larger injectors. i am running the 83 nissan 280z turbo fuel injectors in my rx. that fixed a lot of the hesitation issus i had.

Any codes from the ECU? Have you tried running some injector cleaner thru with some higher octane gas?

3 wire 02?

 

All of mine (of that vintage) are one wire

Maybe the throtle position sensor?

Well I am about to pick it up. The mechanic said that it was a pin that fell out of the connector on the idle valve. He also re-checked the wiring on the 02 sensor. Pics soon! Also just ordered some 280zx turbo injectors for only 20bux!!!