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Stalling/Drivability Problem 900

posted by  tvpierce on  Tue Jan 10 14:10 CST 2006
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last visit: Tue Apr 8 06:40 CST 2014
[RELATED]

I have a drivability issue that’s been confounding me of late, and I’m hoping for some help diagnosing it.

The car (’93 945T) drives well, and the fuel economy is good. But occasionally – originally once a week, now can be once a day (although I have driven it the last 5 days problem-free) – it simply stalls with no warning. Usually it will start right back up, maybe run rough for a few seconds, then continue on as if nothing happened. However, it had one episode the other day in which it continued to run rough
Over the last year, the tach has been “twitching” once in a while. So I thought, “It must be the RPM sensor.”, so I replaced it. It didn’t solve the stalling problem or the twitching tach problem.
So I did the following:
- Replaced the fuel pump relay
- Replaced the ignition amplifier
- Re-flowed the solder on the fuel injection relay
- Cussed a lot at it… but remarkably, even that didn’t help! (go figure)
The stalling really seems to point to a fuel issue, because the tach doesn’t drop when it stalls.
I guess next in line would be fuel pressure regulator and fuel pump.
Any thoughts?

Jeff Pierce
--
'93 945 Turbo (201K miles), '93 945 (140K miles/I maintain for a family member), '93 945 Turbo (sold w 145K miles), '92 Mercedes 190E (174K miles), '85 Jeep CJ-7 w/ Fisher plow (225K miles), '53 Willys Overland w/ Fisher plow (sold to a loving home)






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