i had a similar problem once before 2. turns out it was a bad power fc.....what ecu are u running?

 

To continue on from last problem... The engine would cut if I pushed more than 40% throttle at idle, no specific RPM, just throttle. WHen driving it would cut at about 6 psi... I found that the oxygen sensor connector had come apart inside, and even though it was connected the metal contacts weren't touching. So I connected them. Car idles a little lower now at 900-1000 seems to misfire here and there, and when I rev it, I can mash it, no cut out, but rpms are really slow to drop back down. I drive it, and instead of cutting out it seems to just bog down at the exact same load conditions it was cutting out on before. I cleared the ecu memory hoping to reset any adaption that was set for fuel trim. No change. THe oxygen sensor reading is really odd. It will flatline at .65v and the idle is smooth (but high) and then it will drop after I rev it, to about .1 or even .01v and it hickups a little. I am not familiar with this system, but I am pretty sure that the O2 has wet the bed. Isnt it supposed to occilate between .1 and .9v continuously like every other o2 sensor in the world? I checked MAP and TPS per the FSM and they are good.

 

A faulty O2 sensor should not cause the problems you have under load. It's only used at light throttle (cruising).

Dave

 

What is the o2 reading supposed to look like?

how come with it disconnected it caused it to cut out like that under load?

Does this sound more like a map sensor? I tested it, but not under load? It is correct all the way up to 0.0 inches but I didnt drive it and test it.

I checked the fuel pump to see if its leaking like was suggested, it looks fine, I really don't know how to tell though.

These are the codes present now...

16,28,30,38,39