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Old 05-20-2013, 01:00 PM   #1
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Default complete shutdown while lapping

1990, 1.6, gt2560r, MSII, 11psi. driven responsibly on street regularly with no issues. at the track, got 6-7 laps out of it before the water/oil temps started climbing so did 2 cool down laps and then parked it while idling/heater cranked. got back in after 5 minutes or so and after 2 laps engine shut down. coasted out through pit exit and that was it. cranks, no start. towed it back home and this morning it cranked, started for 1 second and died again. will tow to shop tomorrow.

I don't hear the fuel pump humming with ignition on. can a mortally wounded fuel pump gather enough energy for a one second idle per day?

and yes, I will be upgrading the rad and doing ducting.
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Old 05-20-2013, 02:31 PM   #2
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Fuel? Spark?
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Old 05-20-2013, 02:50 PM   #3
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Quote:
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an a mortally wounded fuel pump gather enough energy for a one second idle per day?
There's an easy way to find out. Unplug a fuel line and have a friend crank. Watch out for spraying fuel in case the pump is still good.
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Old 05-20-2013, 03:25 PM   #4
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fuel pump.

Fuel pump in my OTM died, it would start, idle like crap for half a second, then die. If I waited 15 minutes, I could get another half second out of it.
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Old 05-20-2013, 06:51 PM   #5
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Also seen plugged fuel tank vents and pickups do this.
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Old 05-21-2013, 02:25 PM   #6
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busted crank sensor? it happened to me, easy check. car would start run for a couple seconds and die.
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Old 05-21-2013, 05:28 PM   #7
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no word from shop till tomorrow.
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Old 05-21-2013, 08:10 PM   #8
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Gah why are you bringing a turbo'd miata to a shop?!? Would not trust...

You could also check the crank pulley, they like to slip/break/snap/loosen.
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Old 05-22-2013, 02:01 PM   #9
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sloppy wiring by P.O underdash. F.P wasn't getting power due to short. all good.
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Old 05-26-2013, 02:43 AM   #10
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Quote:
Originally Posted by curly View Post
Gah why are you bringing a turbo'd miata to a shop?!? Would not trust...

You could also check the crank pulley, they like to slip/break/snap/loosen.
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sloppy wiring by P.O underdash. F.P wasn't getting power due to short. all good.
Glad your resolution was simpler than mine.

Not hearing the fuel pump is a "clue." Apparently the shop you used is not clueless.
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Old 05-26-2013, 01:54 PM   #11
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Glad your resolution was simpler than mine.

Not hearing the fuel pump is a "clue." Apparently the shop you used is not clueless.
they seem very competent. no ^%#-up's so far.
of course, now that I've cut out an extractor vent, the clutch started slipping.
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