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LHS cutting off

Hello all. This is a '94 LHS. The car loses power (cuts off) abruptly while I am driving and also at idle. This started out a few weeks ago as a rare occurence and is getting more common. If I am driving, the engine stops for

1 or 2 seconds and restarts itself. If I am idling, it shuts down and simply restarting works- except for two times when it would turn over but would not start. These times, after trying to start for about five minutes, it would come on. Friends have suggested things like air filters, clogged injectors, etc, but I can't believe my air filter is causing this car to shut down as though the battery has been disconnected! I experienced a similar situation once with my 280ZX where it turned out to be an ignition module. Local repair shops have been unable/unwilling to diagnose this problem because of its intermittent and unpredictable nature. Anyone else had this problem or have any ideas as to its cause? TIA for your time-

Freemont

Reply to
Freemont
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Probably the crank and/or cam position sensor is becoming intermittent.

Can you provide trouble codes from the CEL? ON-OFF-ON-OFF-ON (don't start) and read out the the codes.

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Freem> Hello all. This is a '94 LHS. The car loses power (cuts off) abruptly while

Reply to
Mike Behnke

Mike Behnke wrote in news:bv6l5o$8hv$ snipped-for-privacy@info1.fnal.gov:

Thanks, that was quick! There were no trouble codes when the car was at the Chrysler place, about three weeks ago. Which was a GREAT help. I don't know if that tech tried what you describe, but I doubt it. I assume you're referring to the diagnostic computer they use? If so, they said there was no error. Would this sensor cause this behavior? Understand, there is no "running rough", no stuttering, no warning of any kind. In a split second, the engine stops! Then starts back after (usually) 1-2 seconds like nothing happened. Any and all ideas are *greatly* appreciated-

Freemont

Reply to
Freemont

I second this diagnosis. The fuel pump relay is linked to the crank position sensor, so when that sensor stops sending a signal-the fuel stops flowing. Mine failed last year, but before it completely died, it would fail intermittently, then restart-just like you described.

Reply to
Steve Raft

"Steve Raft" wrote in news: snipped-for-privacy@corp.supernews.com:

Wow! This sounds promising then. If you don't mind my asking, what did that repair cost you? BTW, I had suspected either an ignition problem or a fuel flow problem, and when this crap started I noticed a fuel odor. This turned out to be a cracked fuel rail, and after having that replaced, I really hoped my worries were over. No such luck. Is there a resource online where I might find detailed instructions and diagrams for replacing this sensor, assuming it is the kind of job a non- mechanic can handle? Many more thanks to you-

Freemont

Reply to
Freemont

I remember back in the late 70's, Volkswagon was going to come out with a car that turned off its engine when stopped and then started again as you pressed the accelerator. Was supposed to get almost 50 mpg. Sounds like you may have stumbled on to something.

Reply to
Arthur Begun

I let my mechanic do this one, but it doesn't look like too bad of a DIY job. Total cost was ~$180, $60 for the sensor and 2 hrs labor (1 hr diag and 1 hr install).

Reply to
Steve Raft

If no trouble codes set, then it's probably a battery connection issue between the Computer and Battery. Look for any terminal connections that may be loose, that provide power to the computer.

- Bill

Reply to
Bill Hodgson

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