eric951turbo

Dme relay is fine.
But can a dme work sometimes, and sometime not?

The car started again, and again, I don't know what I did.

Took It for a short drive, and I'm presently stuck again on the side o the road.

The engine died again, with a big backfire...

951Saga

My friend’s car was behaving similarly with a few other electrical gremlins. The turbo coolant pump and rear hatch motor would not work. He would be out driving, car would stall out, he’d wiggle the DME relay which would occasionally allow the car to start and run for a short time again.

We installed a fuel pressure gauge verifying no fuel when the car stalled or would not start. After checking continuity for the fuel system, trying my DME relay, while trouble shooting the coolant pump issue, we decided to pull the fuse/ relay box.

We removed the cable ties under the fuse panel in the DS foot well. This allows the harness slack when pulling up for access. As I released the slide which locks the harness connectors to the panel, three plugs just about fell out on their own. Though I thought the connections separated too easily I removed the panel completely to inspect all the connections and harness. So his ’86 951 has a ’96 fuse panel and conveniently each harness connector is scribbled on with a paint pen marking its panel location. We separated each panel layer, what a puzzle, only to find some slight buildup on the DME contacts.

After cleaning the contacts with a burnishing tool, applying DeoxIt to every connection, fully seating and locking each harness connector to the panel his car has been issue free.

Thanks to a not so thorough mechanic/ PO the fuse panel is no longer a mysterious black box.

Without all the searching and trouble shooting we did, simply check the fuse panel connections and look at the DME contacts for carbon buildup.
Good luck to you sir!

schip43

I"m gonna go for simple and cheap! Get a can of WD40 and spray everything electrical! WD40 displaces mositure so if it's a lingering mositure problem that will fix it.
Good luck.

eric951turbo

Thanks all for the new recommendations. This is all good stuff to start looking at. I will post back when I find the problem.

eric951turbo

So I finally found the problem.
ECU connection, full of wet gunk.
Used a air compressor to remove all the gunk, replugged it, and the car started one shot, broom!
I don't understand why I complicate my life like this sometimes.... at least I'm glad I found it.

jeanmanu

Hi to everyone,
I'm afraid I have the same pb as Eric.
I would be interested to locate the ECU connection.
thank you in advance.

____________________
JM, France
'88 944 turbo cup
'79 924
'07 Cayenne S

AlphaOmegaPower

Pull the carpet back under the dash on the passenger side.

AlphaOmegaPower

Glad it was an easy fix and cheap fix

jeanmanu

ok many thanks

____________________
JM, France
'88 944 turbo cup
'79 924
'07 Cayenne S

eric951turbo

I was lucky that I was at a body shop's parking lot when I found the problem. They had a super industrial powerful air compressor. I was able shoot all the gunk out.

eric951turbo

this link could help you....

http://www.lindseyracing.com/LR/Parts/CHIPCHANGE.html