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Help me narrow down the diagnosis >>> ’90 760 Turbo stalling…

posted by  Garyh on  Fri Nov 22 12:43 CST 2002
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last visit: Sun Apr 15 11:44 CST 2012
[RELATED]

Yep, could well be the full pump relay, or radio suppression relay (under the hood), but as well bell housing rpm sensor; neither of which are expensive items. If the tach does not pulse during cranking, then consider rpm sensor (about $35.00), but read post and FAQ about how to replace without breaking bracket.

All the above will usually cause a fairly sudden engine stop. If you are having a slow death of the engine, then consider checking the distributor cap and rotor. Oil can get into the cap from a worn oring. Use an 8mm wrench to remove the three captive screws holding the cap. Although you might think the car will run bad all the time with this problem, this is not necessarily true, as I had this problem a couple of months after replacing all the above relays and sensors. If it is the distributor and you have oil, you can order new orings (small one and a large one are required), which means marking the position of the distributor (to re-install with throwing off timing), removing two 10mm bolts and pulling straight out.






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