luftpirate

Now this is a site I'm sure most of you are familiar with. Today I had the ***** to think I could drive my car to work for the first time since it was nice and sunny outside.

A couple days ago I had the no fire/no tach bounce. I jostled the ref. sensor wires and the housing broke on the top one. I reseated it and the car fired immediately. I went ahead and replaced the sensor with the broken connector housing and the car ran fine for 2 days until I stopped at Arbys today for lunch. When I got back in my car no fire/no tach bounce.

I had my awesome GF bring me my tools and dig the old sensor out of the trash. Tried swapping them both out in the parking lot, the back one is a total B*$%@ to get too. Well its not the sensors, I cleaned the all the connectors out with brake cleaner and worked them a little. Still no luck.

I have the factory alarm which I don't have keys for so I am going to start by bypassing it and then going through the checklist and look over everything I can find on Clarks Garage. I reseated the grounds and the lead going to the ECU as well, tried tapping the ecu and jostling ref. whiles while cranked w/ no luck. Once it was cold after the tow it still won't start, so I def. have some gremlins to chase down.

supes6

it's probably still the reference sensor wiring... to give you some perspective, I have a new RS harness, both sensors were replaced 3 years ago, and I still get the no start/no tach bounce every once in a while. jostling the sensor wires fixes it every time... so I'm looking at needing new sensors already. my bet would be it's your harness if you haven't replaced it already.

Will Feather

Try another DME relay

knfeparty

don't go bypassing the alarm yet. I'd definitely go with sensors or dme relay first.

luftpirate

I plan on trying the relay, the one I ordered as a spare and kept in my glovebox has different pinout from what I can see...

carlege

did you enjoy your Arbys?

944Ross

When you replaced the sensors, did you check their gap to the flywheel? No tach bounce is a pretty clear indication of where the problem is.

luftpirate

No, I did read recently I needed to check the gap. I wasn't aware there was a way to adjust the sensor height. The funny thing is though the new sensor worked fine for about 25 miles and about 10-15 restarts. Because of this I don't think its a gap issue but I plan on checking it out anyways.

luftpirate

Found my DME relay and that was it. Going ahead an replacing all the sensors and connectors anyways hopefully that will be the end of the nostarts (crosses fingers)

Yeah needless to say it totally ruined the whole Arbys experience.

But anyways here is how my week went.

Weds : Hit a deer in my Jeep coming home and damaged the front bumper and broke a mirror.
Thurs : Stranded at Arbys in a 944
Fri : My GFs Jetta died on her way to work and I end up having it towed also. Burnt wiring smell

944Ross

Glad you got one of them on the road!

I'd like to see a picture thread of "944's on a rollback"

luftpirate

Thanks, found the GFs AC compressor bearing has totally seized and pretty sure its what caused the engine to stall out and not start again.

Rollback thread is a great idea, maybe even a calender?

peanut

if its not been used regularly then my guess would be sticky injectors . I would use a 9v torch battery to trigger all the injectors including the cold start injector until you can hear the solenoids clearly clicking.
Thats what got my 944S2 going again twice after spells of disuse.