924Board.org

[Coolbri1191]

Got out of my night class then went to drive home, but every time I hit a bump the car would go limp for a second then come back. It did this on the way to school once so at first I didn't think much of it. I take this road quite often.

On my way back though, I have to go up a big hill on the freeway, and it's poorly paved so a lot of bumps kept on making the car go limp. Then I lost almost all my power and could smell extremely rich fuel and hear a crackling near my fuses and relay. After that I hit one more small bump on the road and the car shut off, but as I pulled over, I heard the relay shorting out even with the car off, most likely the DME relay.

I'm going to take a look at it in the morning, but I'm thinking somehow my DME relay shorted out. I bought it brand new in June of 2010. If not that, then a crank sensor? I say that, because the tach would show 0 rpm then go back. Who knows, maybe you guys have an idea. I have never had something like this happen before.
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Guards Red 1987 Porsche 924S (Automatic)
2001 Ford Explorer Sport (DD)

[Rasta Monsta]

Based on the your observations of the tach, I would first check the speed/reference sensors and associated wiring. If it looks crusty/crappy at all, and you don't know when they were replaced, it is worth replacing them.

I recently found some Facet repalcements that are pretty cheap compared to OEM:

Link at Pelican.

If that stuff looks good, check the connection to the DME computer under the dash. Sometimes the computers fail (broken traces), it's nice to have a known good spare for testing purposes.

#tag facet reference sensor
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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[Coolbri1191]

Dang.. I had a spare DME from an 86 944 parts car but I sold it. I knew should have kept it...

I also have a good spare crank sensor.

I'm worried about replacing one of the crank sensors though because I know the harness is very sensitive and if it's moved the car won't start.

I think what I'll do first is check that DME relay and open it up.

Thanks for your help, and the link if I need another one.
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Guards Red 1987 Porsche 924S (Automatic)
2001 Ford Explorer Sport (DD)

[Rasta Monsta]

[Coolbri1191]

These cars in general? At least I was told that.. Removing one I heard is risky because it could move the harness and cause a no-start.

Also, it was the relay. The entire fuse box is able to move freely about 1-2" and that was enough to dislodge the DME relay. Surprised it hadn't happened sooner.
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Guards Red 1987 Porsche 924S (Automatic)
2001 Ford Explorer Sport (DD)

[Rasta Monsta]