'93 stalled on interstate - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to Miataturbo.net   Members

General Miata Chat A place to talk about anything Miata

LinkBack Thread Tools
Old 06-12-2012, 09:10 PM   #1
Elite Member
Thread Starter
iTrader: (12)
GeneSplicer's Avatar
Join Date: Sep 2009
Location: Birmingham, AL
Posts: 1,962
Total Cats: 140
Default '93 stalled on interstate

Was into a 4hr haul when about 1.5 into the car just suddeny died. Still had RPM on gauge. Pulled over and all it did was turn over and very slight sputter at first, nothing after that. I hot-wired the fuel pump on but still no start. After dicking around looking for loose wires at the coil packs and ignitor and more cranking over, I gave up... about 30min later after stalling, I tried cranking it over waiting for the tow truck (the wife) and the b!tch started right up?!? I backed it up an on ramp to turn around, put it in 1st and gave it slight gas and it died again. 15min later it started up and was about 45 min on way back when it stalled out again. This time I parked it and when back for my tow vehicle and trailer... and of course, when I got back to the car, it started right up and drove it onto the trailer.

It almost seems an ignition short, or something over heating knocking out the ignition - which is why I was thinking ignitor. Anyway, hauling it to the track this wekeend for some diagnostic time - at least I get a free tow if it stalls again.

Any ideas on what it could be? I'm taking a spare ignitor, coil pack, and ecu with me to the track - I didn't think CAS b/c I had tach signal when it stalled out.
GeneSplicer is offline   Reply With Quote
Old 06-12-2012, 09:37 PM   #2
Cpt. Slow
iTrader: (24)
curly's Avatar
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 11,618
Total Cats: 463

I had a similar issue with a chevy truck, it'd work when cold, die when hot. Ended up being the coolant sensor reading a constant -40 degrees. So it was roughly the correct mixture when cold, but when the engine was hot, a cold fuel map (or whatever the '88 equivalent was, choke setting?) plus a hot engine and it would just die.

Remember you have three. The one in the front thermostat turns the fan on and off, the single wire coming out at a horizontal angle at the back of the head is for the gauge, and the two wire sensor coming out vertically in roughly the same location is for the ECU, that's the one you wanna check.

Is this the Zero then? Or some stock DD?

If it's on MS, MS reads off that two wire sensor, compare it to the dash gauge. Although that's even harder since the gauge sucks.
curly is offline   Reply With Quote
Old 06-13-2012, 08:25 AM   #3
Elite Member
Thread Starter
iTrader: (12)
GeneSplicer's Avatar
Join Date: Sep 2009
Location: Birmingham, AL
Posts: 1,962
Total Cats: 140

It's my mostly stock '93 - but soon everything on the 'zero' will be put into this, including the MS. I'll check that sensor that goes to the ecu.
GeneSplicer is offline   Reply With Quote
Old 06-13-2012, 09:10 AM   #4
Elite Member
iTrader: (19)
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,139
Total Cats: 297

I had this problam on my Jeep. Replaced both crank and cam sensors. Pretty sure the cam sensor was okay, but I already bought it, no returns.
rleete is offline   Reply With Quote
Old 06-13-2012, 08:18 PM   #5
Elite Member
iTrader: (5)
m2cupcar's Avatar
Join Date: Jan 2005
Location: Atlanta
Posts: 6,935
Total Cats: 130

check grounds- I lost a ground bump drafting and had to park it between 10a and 10b
m2cupcar is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
MAPdot tuning ZX-Tex MEGAsquirt 21 01-13-2014 08:04 PM
Sputtering and Stalling kevin02 General Miata Chat 13 05-12-2008 11:37 AM
90-93 idle droop or stall issues Ben Useful Saved Posts 33 02-07-2008 11:53 AM
installed bov, and car stalls when off throttle urgaynknowit Prefabbed Turbo Kits 44 02-05-2008 05:26 AM
Car is pissing me off. curves DIY Turbo Discussion 20 01-31-2008 11:50 PM

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 07:30 AM.