mb911

ok so yesterday it was 100 out and humid drove the 964 for a a good hour drive. ran fine . I drove i this morning and was fine until just now it died on me twice and would be down on power which seemed like it was from going around corners and running out of gas which it was not. I just parked it and checked the DME relay and it was hot to the touch. What would cause the DME relay to get hot? from all the records I see no mention of a fuel pump so I am half thinking it is on its way out. Any thoughts?

tbennett017

Is it possible the contacts inside are dirty/grody? Wouldn't the increased resistance make heat?

Can you open it up and check them? Sometimes a quick clean with emory paper can make a diff.

mb911

not sure it is dirty I am suspect of the relay just bad out of the box. I bought it new 3-4 months ago and I used it 2000 miles. I will take it apart and check

FeralComprehension

Check this link.

mb911

Cool I will check that out. I was unable to take the car for a drive last night after switching to the old relay but will check out the new one(the one I think failed) out and see whats in there. I am concerned it could be a couple of things going on with the running condition including possible AFM, CHT, vaccum leak , but I think DME relay seems most likely as I did start it up last night and it idled perfect with good throttle response though as I said nothing under load and this seems heat related

mb911

I have not made much progress other then discovering that the Vacuum line was disconnected from the resonance valve

hawk911

I have spares too, if you need one. We can put it in mine to test, too

mb911

Thanks I will keep that in mind I also have a 3 way jumper that I made but the biggest issue is it needs to warm up and run for a while before it (car cuts out)will happen I also need to look at the AFM TSB this evening

CBR786

my money is on the relay lol. I had the same problem with a VW TDi it kep cutting out when warm turned out is was the fuel pump relay which was very hot to touch.

Good luck with your fault finding