Just ran codes again
koeo 34 and 84
Koer 4 then 91 and 34
Engine balance showed 9
So code 91 is O2 sensor, it's a new sensor and I replaced both o2s because I had code 91 before. I cleared the codes and went for a drive after replacing them and no code 91.
Tonight is the first time I ran the codes after driving it for a week. After I ran the codes I shut the car off, pulled the test jumper and unplugged the o2 sensors. I went for another ride and same problem, falls on its face at 5k.
'92 GT--YSI 2.95/8, Bennet Racing A4 347, TEA ported TW Heads, TFS-R Intake, TFS Stage 2 Cam, 65 TB, 72's, 3.55, C4, 275/60 MT DR's-Gone but not forgotten To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
[QUOTE=BigDumbRedneck;18585932]No code or CEL when you unplugged the MAF?[/QUOTE
Yes I think the CEL was on when I went for a ride. I pulled the battery to reset it after I went for the ride and hooked the maf back up.
o2 voltage test
pin 43 I get .15 -.8 and its bouncing around between the two numbers
pin 29 I get .07 - .8 and its the same bouncing around
This was with the car fully warmed up and at idle
I also tested free reving it (I never liked having to do this) and it still cuts out at 5000 rpm. I pulled the ecm and removed the cover. The ecm looks great, caps are in good shape, no swelling or leaking and I did not see any burned traces.
Ok at idle the o2 are still bouncing between the numbers I posted above and when I hit the throttle the voltage drops for a second to .002 or .003 it's hard to tell. Both side do the same thing and at the same frequency.
Fuel pressure looks great and it holds pressure for at least an hour when I shut it off. Maybe I didn't do the o2 test right. I'll try again tomorrow. When I snap the throttle should the o2 go immediately rich, above .6 volts? I think I snapped the throttle while looking at the tach then I looked at my meter.