Intermittent power loss

[Guest]

Can anybody help, i have had a 1989 944S2 for about a year, it had a poor idle problem (occasionally hunting and cutting out at stops), i had the local specialist look at it who changed the throttle switch, temperature switch and fuel pump, during the service it also had new ignition leads. After a while the idle fault returned and the fuel pressure regulator was replaced. The car ran ok for a few weeks but now has developed an intermittent fault - cuts out at stops and is difficult to start ,when starts idles badly as you try to accelerate away nothing happens then the revs zoom up and you accelerate for a few metres[&o] then it loses power again. i had it back to the garage who set all the idle up again , cleaned the fuel lines out, cleaned the connectors on the engine management bits etc, they could not find the fault as they could only reproduce it on the odd occasion. It cleared for about 5 journeys but has now reappeared, any ideas???

 

[Andy Duncan]

DME Fuel relay!!!!

 

[Guest]

Cheers, will try it, thankyou

Just fitted it today, car ran fine so fingers crossed

Ran again today and the fault is still there, had chance to get better look at the fault this time as there was no traffic around. The car seems to drop to just above idle with the pedal having no effect on the revs, the car does not cut out and will trundle along at just under walking pace. If you push the pedal down and hold, the revs (eventually) will suddenly jump right up and the car jolts forward then may drop revs again or accelerate as normal, this happened twice in around 10 miles, any ideas????

 

[944Turbo]

Mine was very similar when the coil was dying, there is a simple check with a mulimeter (on ohms) the correct figures are in the workshop manual,
Tony

 

[Guest]

Thanks, i will try it, Regards

Adey

 

[plhorner]

Adrian,
I reckon its pesky kids getting into the garage and playing around with it......[] I think I know the prime suspect! []

 

[Guest]

Well I will be checking for fingerprints and will see if they match any little gremlins in the house, if found I will instruct the child minder to feed the culprit on bread and water till its fixed[]

 

[Guest]

I had a similar problem, along with an occasional misfire if I tried to keep the engine running when the idle was hunting. Turned out to be the timing and balance shaft belts which needed to be adjusted and re-tensioned.

 

[Guest]

Took it to a local specialist (car played up twice on the way), he could not duplicate the fault but had a good look round and cleaned corrosion from 2 connectors, but also found lots of excess play on the throttle cable which when moved was found to snag. He adjusted the cable and the car has now run ok for 5 days so hopefully fingers crossed !