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]

Ok cool. Yeah I'm familiar with the ECU location but never actually pulled it out and looked at it. It's definitely worth looking at. Far as the ground on the intake, it's good, I know that's a common ground that gets overlooked bc it's hidden.

Yeah code 12 refers to no RPM signal. First time the car had the code when I bought it (3/2012) and took the diz cap off and the pickup coil was mangled. A salvaged diz fixed the code, until last fall. I replaced the dizzy this time with a new one, code still came on intermittently. Then replaced the igniter as well. The igniter was getting so hot I couldn't touch it. The first time it knocked off (last year) I was cruising at 60mph, CEL came on and almost instantly died. Popped the hood and felt the igniter and I about burned myself lol. Hadn't had a problem since changing the igniter till now. This time it died at a stop, and no CEL thrown before stalling. Weird


Seeing as in I've replaced both dizzy and igniter in almost less than a year, I'm thinking the diz plug is too gapped, or ECU is jacked up. OOORRRRR I've got a bad wire in the harness somewhere.. Hopefully I'll get some time this weekend to tinker with it. For now I'll be DD'ing the MX-5. Thanks for the input so far