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1990 240 DL- problem after problem 200 1990

posted by  machine man on  Thu May 27 20:19 CST 2010
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last visit: Wed Oct 22 15:40 CST 2014
[RELATED]

It appears to be two problems like you say.

I have experienced an occasional drop out with idle and it turns out to be a bad vacumm hose with a tiny crack on the under side of them. Since you have done so much I would think you would have found that.

I thought the fuses was a good place to look as suggested in another post. Just coming out of winter may have started some corrosion some place. I'm sure was the thought behind it.

Since it seems to be a power thing the battery cables may have may have some corrosion under the insulation on the ends connecting the starter or to the engine ground. Check out all the wires in the starter harness back up to and including the firewall connector.

A worn contact in the ignition switch or the connector onto it, might be worth a peek-a-boo.

I have read the switch can cause weird things. It makes some since if a jiggle can drop out relays for a split second.

You might try having the engine running and get behind the switch and wiggle stuff. Try wiggling/twisting the key in the switch too!

Just some things I would try.
Phil






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