I have owned my car for about 15 years. About 2 years after I got it, it starting running rough/stumbling while driving it one day. Replaced the DME relay and it was fine for about 13 years. 2 years ago it did it again. New relay fixed it. Just happened a third time last week. I know the relays can be a problem, but why did my last one only last 2 years. I only drove the car 4-5,000 miles. Bad DME or could there be another reason it went bad so quickly?

 

Might want to try this:

http://www.ftech9.com/new-products/s...-dme-relay-ssr

 

Thank you. Has anyone ever tried one?

 

Is there a reason the DME went so quickly? For example is the fuel pump going bad and drawing more power causing the DME to burn out?

 

Yes. I have 3. Buy one if you can. Fast. If it's the pump prime it will partially replace a three legged jumper as you will know when you turn the key of your pumps working without cranking.

 

Sent PM.

 

so I purchased one of the above relays. I do not do long drives so for the last few months everything seemed fine but yesterday after driving the car on a hotter day it shut down again. It starts to miss fire, back fires once or twice, stumbles then stops running. If I let it sit until it cools down for an hour or so it will start and run again. any ideas? fuel pump? ignition coil?

 

Short(s) in your wire harness / speed & reference sensor

 

When you crank it and it won't start, does the tach needle bounce a little like this?


Also, when it shuts down, does the DME feel hot?