93blackbeauty
Chris Clayton
Hey guys not sure if this is the right section but this is what Ive got. Bought a 93 Lightning two weeks ago as a non runner. The dealer couldn't figure it out and the shop they sent it too knew nothing about OBD-1 (They were convinced it was the ECM but would take three days to get one and I just couldn't wait that long. It would start idle for a few minutes but if you touched the gas or put it in gear it would stall. So I towed it back to Atlanta from just outside Myrtle Beach. (price was too good to pass up). So dropped it at the shop I have most of my diagnostic work done here local and had it looked at by a tech who claims to have had two of these Gen 1's. He said he found a loose ground and they truck ran all day for him no problems. So I went and picked it up. Been driving it for a few days even drove it to work one day 40 miles all interstate no issues started every time ran really good. Till this morning went and got new tires then ran a few errands and came home and washed it. Immediately wouldn't start after. Finally got it to catch but it ran really rough smelled like fuel and had really erratic idle. Will run about 2-3 minutes then idle dips so low it just stalls. Truck is completely stock as far as I can tell with the exception of the ECM I pulled it out when I first got it home and its labeled as a 94 good ECM so pretty sure its been replaced in the past. I had two codes today which is the first time it has set any code 26 and code 654. Not sure what that indicates as 26 is a MAF code which I'm 100% sure this truck is speed density and 654 pulled up as a trans not in park code. Any info is appreciated. I can get the ECM but its non refundable so id hate to buy it and that not be it. Any definitive way to test one?
Also not sure if it maters but this ECM only works if you install it in the slot rotated 180 degrees from the stock position. Not sure if its somehow grounded in the tray or if this is another symptom. It also will not run period if you take the PCM out of the tray. (I was testing to ensure it wasn't a harness short). I have toyed with the idea of a mass air conversion but not sure if its worth it at this point. Really just need her to run. Bought it as a winter daily since my mustang is way to much on winter roads.
Codes:
26, 654
Hope this isn't too wordy but wanted to give as much detail as possible.
Also not sure if it maters but this ECM only works if you install it in the slot rotated 180 degrees from the stock position. Not sure if its somehow grounded in the tray or if this is another symptom. It also will not run period if you take the PCM out of the tray. (I was testing to ensure it wasn't a harness short). I have toyed with the idea of a mass air conversion but not sure if its worth it at this point. Really just need her to run. Bought it as a winter daily since my mustang is way to much on winter roads.
Codes:
26, 654
Hope this isn't too wordy but wanted to give as much detail as possible.