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DME Relay


mfoley

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Well I washed my car today so it would be ready for next weekend. I'm sure Tim will be taking lots of pictures . When I tried to start it to pull it back in the garage it wouldn't start. It just cranked. My first thought is the DME relay. I've been meaning to get a spare anyway... now I'll get two. Does anyone know if the DME relay in my '89 Turbo is the same as the 85.5 NA? Joe?

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If memory serves they are. I think the 993 and 996 relay are the same also. You can sometimes get NOS relays on Ebay for $10-$15. Don't bother with a used one. Go to the FRwilk website. He has a way to jumper around the relay. http://www.frwilk.com and go to the DME relay page at the bottom. It works!!

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Thanks Eric. I pulled both relays and looked at them. The schematics are printed on both of them and they were the same. I switched them and the Turbo started but the NA wouldn't. I must have another problem. Any suggestions? I hope it's not the DME.

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Try the jumper from the web page. It could be your fuel pump. Another thing to check are the connectors in the back of the fuel rail. The one's that go down to the flywheel sensors. A few of us had problems with them. Another thing to check is the connector on the temp sensor. It's under the intake man near the front of the motor.

Good luck,

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Does it crank and not start?

 

The DME will control the fuel. So one way to check is to crank a little. Then pull a spark plug. If it wet then you have fuel and no spark.

 

You can also ground the plug and see it sparks outside the engine. If so you have spark.

 

If you have spark and fuel you should be running.

 

HTH

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If washing was the last thing you did.........Where did the water get into?

Park it in the sun for a day, then see if it starts.

BTW, this is a good excuse for NEVER washing the car?

 

I just went through some weird dash lights flashing problems on the Volvo. Dash fan wouldn't work either......

We had the huge rain storm, right?

2 days later, all's fine.

Just dried out.

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Thanks guys. Hopefully it will just dry out as Tim suggests and will start when I get home tonight. If not, I'll start trying each of the things you suggest. One way or the other it will be running this weekend . I'll keep you posted.

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Did you wash your engine bay?

 

If so, water could have gotten into your plug wells. That happened once with another car of mine, after washing. It cranked but wouldn't start. I pulled the plug wires, popped the hood and let it air out. That evening it cranked and fired no problem.

 

Good luck and see you at the track.

 

s

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Good news. I got home last night and went into the garage to start working on my car and all I had to do was turn the key and it started. It's nice to be lucky once in a while.

 

Thanks for the suggestions.

 

See you on Saturday.

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Hahaha. Serves you right Mark for trying to show us up always with the shiny, good looking car!!

 

See you soon and glad to hear there's nothing to worry about. Big relief!

 

Steve

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I don't know who I'm showing up . You'll be driving up in style carrying your car in your RV, and I'll be driving mine at 3:30AM with no heater, no windows, no radio, no fun ...

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