First, a little back story. I bought this car a few months ago. Its a 93 GT, 5spd. The car is bone stock, with the exception of the off-road x-pipe and mufflers. A couple of weeks after buying it, I made a drive to get new tires put on (about an hour drive each way). On the way home, I got into some heavy traffic. As I slowed down for a red light, the car started stumbling like it was out of gas... then it died. It would crank back up, but just stumble and die again. If you touched the gas pedal, it just shut off. I ended up buying a new battery since it wouldn't even jump off. I was able to limp it home. I unplugged the MAF and it cleared up, so I replaced it with a used MAF from a friend. No problems since.
Fast forward to yesterday. I leave work to head home (25ish miles). Its 100*. The car drives fine until Im slowing down to turn on my road. When I push the clutch in, it starts to stumble and then dies... just like before. It cranks, but stumbles and dies. Tried unplugging the MAF, no dice... so I plugged it back in. After about 5 minutes, I was able to get it fired up and into my shop driveway. Immediately started the usual tests, results were as follows:
KOEO:
67- Neutral drive switch or circuit
33- Canister or EGR valve not operating properly
66- No Mass Air Flow sensor signal (where I unplugged it)
96- Fuel pump circuit
KOER:
12- Idle speed control out of specified range
44- Air management system inoperative (the smog pump is bypassed. im guesing this code is from that)
33- Canister or EGR valve not operating properly
Cylinder Balance test: code90 (=pass)
I was too hot and frustrated to mess with it yesterday. This morning on the way to work, it was flawless. I guess i'll start by checking the TFI module this afternoon, and I know that the PIP is probably next in line. I've searched, and I've read @jrichker links about stumbling idle, etc. Just seeing if anyone had other opinions with it being so sporadic.
Fast forward to yesterday. I leave work to head home (25ish miles). Its 100*. The car drives fine until Im slowing down to turn on my road. When I push the clutch in, it starts to stumble and then dies... just like before. It cranks, but stumbles and dies. Tried unplugging the MAF, no dice... so I plugged it back in. After about 5 minutes, I was able to get it fired up and into my shop driveway. Immediately started the usual tests, results were as follows:
KOEO:
67- Neutral drive switch or circuit
33- Canister or EGR valve not operating properly
66- No Mass Air Flow sensor signal (where I unplugged it)
96- Fuel pump circuit
KOER:
12- Idle speed control out of specified range
44- Air management system inoperative (the smog pump is bypassed. im guesing this code is from that)
33- Canister or EGR valve not operating properly
Cylinder Balance test: code90 (=pass)
I was too hot and frustrated to mess with it yesterday. This morning on the way to work, it was flawless. I guess i'll start by checking the TFI module this afternoon, and I know that the PIP is probably next in line. I've searched, and I've read @jrichker links about stumbling idle, etc. Just seeing if anyone had other opinions with it being so sporadic.