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1phatG · Post by **1phatG** » 24 Aug 2004, 09:35

I have a 740 wagon 1990. Have trouble with it just stalling out while driving. I pull over and it will start allmost right back up. Does this at pretty random times. When I am sitting in trafic it some times does it also. You can feel it start to happen when you are sitting still. What can this be.

Guest · Post by **Guest** » 26 Aug 2004, 13:21

quite a few things..
-bad fuel pressure regulator (usually has other symptoms though, like notable hesitation on acceleration)
-air mass meter could be off, but that normally has bad performance implications
idle motor could be closing up for some reason, which is somewhat likely.
-arbitary electrical problem.. i would hope it's not this cause it'll be kinda difficult to pinpoint if it's something that happens randomly

LaRy · Post by **LaRy** » 28 Aug 2004, 01:48

Next time this happens, please check the tachometer when the engine is stalling (but still rotating). If the tach is showing 0 rpm, you have no ignition, but if it is still showing some realistic rpm, it is something else. (Just something to start with)

Migs · Post by **Migs** » 06 Nov 2004, 20:09

This problem has happened at least once in all three of our cars ('88 760 Turbo Wagon--'88 760T Sedan -- & '87 740 Sedan).

In the 3 three vehicles we discovered that it was more common than previously thought. A faulty Injection Control Relay was the culprit. The '87 740GLE has a single BLACK Relay can be seen mounted on the frame that holds the coolant reservoir under the hood. The 760TURBO models have a pair mounted on the right side, just above the general area of the ABS controller.

It is cheap to replace - About US$30. Give it a try, post results.