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Sounds kind of like a voltage problem... (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by EM on September 15, 1999 at 10:22:33:

In Reply to: ok all you guru's out there!!! posted by ed on September 14, 1999 at 21:11:40:

I don't know how a car could go in and out of time. Either the belt slips and it goes out of time, or it doesn't (kablooie on your valves BTW). There could be something about the timing of your car that's different than anything else I've heard of (certainly possible, in deference to the earlier posters...) However, I'm not sure I'm sold on the timing belt idea.

In your post you mention that you checked the wiring harness. But given the symptoms you report, I might wonder whether you have a problem with the alternator, voltage regulator (!) or an intermittantly bad ground.

You might try something like this...

If you can get a digital voltmeter onto the system someplace were you can read it when the car is running, check to be sure the voltage is staying in the 14 range. If it drops when the symptoms occur, at least you have a diag that gives you a point in the right direction. Then, you could work on the electrical side looking for problems with the stuff I mentioned earlier.

Sometimes, these intermittant problems are the biggest PITA to diagnose and correct. They're the ones where "it runs perfectly" whenever you take it to the mechanic, but cause problems as soon as you're out of sight of the garage.

Good luck,

EM


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