Car died in traffic.., And it started right back up after havin it towed home.. **FIXED-ECU Options

[kevin311]

Thought I had this issue fixed after I replaced the igniter and dizzy last year to fix a code 12. Apparently not. This has happened twice now. Once before replacement parts, and this is the first time since new parts were installed. Left work yesterday and only got about 5 miles and the car sputtered a little and then just knocked off while I was sitting at a stop light. Had it towed home 35 miles and was able to crank it back up and drive it off the rollback.. Temp never got hot, has been staying just under midpoint of temp gauge (is that normal op temp btw?) CEL didn't come on this time either like it had before. It's a '94 GT 5sp. Not sure where to start. I've read it could be coolant temp sensor giving false reading to PCM and killing the engine bc of high engine temp. Does the 5s really have this fail safe?! Thought it was odd. Also read it could be clogged cat converter, but not throwing any codes. Considering I've replaced just about all the ignition components since owning the car I believe it may be fuel related. Any input is appreciated. Thanks in advance guys.

This post has been edited by kevin311: Oct 6, 2014 - 10:13 PM

[kevin311]

Alright, time for an update.

Checked the coolant temp sensor prior to cranking, outside temp here today's around 65*F. Resistance was just under 3 kOhms, which by the graph is accurate I'd say. Fired her up and before it reached OP temp it tried to shutter off. Long as I fed it some gas it would stay running, like crap, but running. Ran it until normal temp then shut it off and measure resistance again. This time measured at .24 kOhms which again looked accurate. So I'm convinced te sensor is fine.

Checked resistances in pickup coils at diz, they're well within spec. So diz is OK.

Checked trouble codes, codes 12 AND 13 had been stored. 13 is new, when I checked the codes two or so weeks ago, 12 was the only one stored. Reset everything and 12 have erased but 13 still remains. Which is an interruption in RPM signal. By the BGB most likely solution is dirty or loose connectors and/or terminals. We'll see.

Checked the grounds Smaay and all are connected, clean and tight.

Pulled the ECU and took a peak inside, looks like there's a few cooked resistors. At least from what I can tell they're cooked, I'm no electrician, but they don't look right I'll try to get a pic up. How do I post pics in the forum?! Lol

This post has been edited by kevin311: Sep 29, 2014 - 4:59 PM