Newbie with sickly 944 S2 :(

Pink piggy · **Posted:** Sun Nov 01, 2015 10:03 am

I have just done a head refurb on my 2.5 Lux and it too would start but not tickover.
The offending part was the pipe from the inlet manifold to the idle speed control unit which sits under the inlet manifold this was folded back and totally restricting the air supply.
A bit of a re route and its ticking over properly.

AlpineTurbo · **Posted:** Mon Nov 09, 2015 8:32 pm

979-SPORT wrote:

AlpineTurbo wrote:

I fitted that type of DME relay into my 951 and it worked fine when the old DME began to play up (it would not start). Have you tried the 'DME jumper' trick to rule out the DME relay despite the small cost of a new one?

I fitted the new engine to that car and near enough a new cooling system. I can edit this comment out if you wish but that car is now on engine no.3. With one owner it went through 2 engines with the cooling system being seen as the main culprit in addition to a low oil level.

DME Jumper? Is that when you bridge the terminals on the relay with a piece of wire?....I could try that, but as you say, a new DME is peanuts.....I did have have the rad switch replaced when I had the belts and engine seals done....the oil pressure is perfectly acceptable now...about 3.5 bar idle?...but, I will have the entire cooling system checked/flushed/replaced as necessary....it will give me something to do on a weekend

....

There should have been a need to change the rad switch. It was a new Porsche item I fitted back in 2009

. However, I did have to clean the dash contacts a couple of times otherwise the car claimed it was overheating...

Endoman · **Posted:** Tue Dec 01, 2015 5:34 pm

Try cleaning the idle stabilization valve, it's in an awkward spot but can be removed with a bit of fiddling. If stood for a while they can stick or give erratic operation. The piston should rotate easily if you flick it backwards and forwards. A good soak with WD40 and finish with brake dust remover should sort it. Common problem on 993s and the 944 S2 one looks identical. Mine have stuck on both cars.
Fiddle with the MAF at your peril they are very expensive to replace.

AlpineTurbo · **Posted:** Tue Dec 01, 2015 7:04 pm

I probably should not say this but the MAF in that car had been fiddled with when I bought it when looking at it at closer inspection, but I doubt there are many 944s which haven't had their MAFs fettled with. Even my turbo did.

The ISV is a good shout however. It was never the best idler that car.

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Newbie with sickly 944 S2 :(

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