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88 740GLE still dies at idle - more info posted from last post on Apr 10th... 700

posted by  KDMiller on  Thu Apr 17 05:03 CST 2003
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Last week I posted a question about my 88 740GLE. Here's the problem: At idle after running anywhere from 30 seconds to 3 minutes, the Volvo suddenly dies. The tach needle immediately falls to zero. Wehn I immediately try to restart, the tach needle does not move and the car will not start. If after 30 seconds or so, it will occasionally start (quite hesitantly). After about 5 minutes of not trying to start it, it'll fire right up. It also dies if I hold the accelerator pedal steadily at about 2000rpms. Several posts from my previous post led me to believe that the Halls Effect Sensor was probably bad. So... I replaced the sensor, the distributor cap and the rotor. (Crappy job - what was Volvo thinking when they built THAT system?!) No joy. I then replaced the coil and the fuel injection relay from another Volvo I own. Still no joy. Same problem. Swapped out the ECU and mass air flow sensor. STILL no joy! Now I'm getting frustrated, as I don't really see what else there is to cause this problem.

If you've had this problem, perhaps you can shed some light? I'll gladly answer any questions about what I've done so far, but what I posted about is pretty much it.

You can email me at kdmiller2@juno.com or post here.

Thanks in advance!

Cheers~
Keith





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