Porsche Enthusiasts Club Forum

Hi all

I Have a Porsche that has been sitting idle for almost 18 months now since developing this fault, so if anyone can help please.

The vehicle in question is a 944S2 3.0 ltr 1990 model.

Here is the story:

Parked the car up as it needed work for it's MOT.... with one thing and another days turned into weeks, but each week the car was religeously started up.

The battery went flat AND WAS REMOVED FROM THE CAR to charge it. When the battery was re-fitted to the car the alarm sounded, this was the first time I had ever heard the alarm sound, after a while we managed to shut off the alarm by locking and unlocking the car, but from this moment on the car has failed to start.

I'm convinced the porsche alarm has somehow imobilised the engine, its just too much of a coinsidence. Me and my dad ( neither Porsche specialists by a long stretch ) have tried to breath life back into her but with no joy. What we do know is there is definately no spark at the HT leads but power to the coil.

Does anyone know if the stock alarm fitted by Porsche works by imobilsing the spark ? and if so can I disable / bypass it easily and how. ( and where the hell is it ? )

The car is fitted with an aftermarket imobiliser, but the device is wired to stop the starter motor from turning and is working as it should. As mentioned the alarm siren sounded when we refitted the battery, so this has to be the Porsche alarm as the aftermarket device has no siren. ( hope that's clear !



If the alarm is not to blame I did find a posting on another site regarding " Not starting with no spark " with a walk through guide, however it looks a bit indepth for me and might need some specialist tools ( specialist tools being anything other than a hammer, screwdriver and a wrench )

I also read that the DME relay can be problematic, I found a spare DME relay in the glove box, however I have no way of knowing if it was a working unit or faulty, tried swapping this but still the same.

Any suggestions would be very very very much appreciated, when I got back in the cabin last week the smell alone got me all nostalgic.

I'd really like to be driving her again soon.

Many thanks in advance.

Paul

Sounds like you need someone with more experience of the Porsche fitted alarm as it sounds like it might need to be reset.

In the meantime you could have look at Clarke garage and test the resistance of the reference sensors, they are a common failing point expecially if the car has stood, DME could have corrosion, but other than that I'd hope some with alarm experience should pop along

If you cant' reset it rip the alarm out & start again. It's stuffed by the sound of it. If you don't want to do it yourself buy a new system & they will sort it out for you. Usually a requirement for insurance anyway. Just don't get a Clifford....