help please
- Thread starter Guest
- Start date
Could be the same problem I had when trying to start my S2 in April having been laid up since October - stale petrol! Put some fresh fuel in and it's been fine ever since.
Ouch - no I don't remember it but that couldn't have been far off the cost of a decent second-hand engine, surely?
A bit of a long shot, but there is something odd that occasionally happens to S2's when starting which manifests itself as a misfire. There have been a couple of threads about it within the last year or so, one of which was mine. Here:
https://www.porscheclubgb.com/forum/tm.asp?m=778974&mpage=1&key=starting򾖣
https://www.porscheclubgb.com/forum/tm.asp?m=727042&mpage=1&key=%F2%B1%A0%82
Are you simply suffering a worse version of this?
Oli.
A bit of a long shot, but there is something odd that occasionally happens to S2's when starting which manifests itself as a misfire. There have been a couple of threads about it within the last year or so, one of which was mine. Here:
https://www.porscheclubgb.com/forum/tm.asp?m=778974&mpage=1&key=starting򾖣
https://www.porscheclubgb.com/forum/tm.asp?m=727042&mpage=1&key=%F2%B1%A0%82
Are you simply suffering a worse version of this?
Oli.
Thanks for all replies,
Changed plugs, earth strap on battery and having pumped 5L fuel out (has about 20 L in tank) put 10 litres High octane with octane booster added. started and runs fine. So as to the cause - take your pick, my car does run rich ( how do you control mixture? I think the car has previously been chipped) and I suspect as I had only been bringing it up to normal temp and letting idle for 20 mins or so it fouled the plugs and stale fuel didnt help.
Changed plugs, earth strap on battery and having pumped 5L fuel out (has about 20 L in tank) put 10 litres High octane with octane booster added. started and runs fine. So as to the cause - take your pick, my car does run rich ( how do you control mixture? I think the car has previously been chipped) and I suspect as I had only been bringing it up to normal temp and letting idle for 20 mins or so it fouled the plugs and stale fuel didnt help.
DavidL
Active member
bmnelsc
New member
I tried to follow the mystery relay link but it wouldn't work. I found the following as one of the posts under that heading (before I saw that it was added here)... It is about third page in ...DavidL said:
RENNLIST TEXT follows
Lilja.. based on some reading I've done, that was an 'experimental' relay (basically a "flasher blocking relay") Porsche put into some 84-85 models which altered the air-fuel ratio going into the computer (pin#13 I think) for the first ~2min~40seconds or so. The same way a flasher relay intermittently blocks the power to a turn signal light (making it flash) the relay would interrupt power to a function in the DME that would alter the air-fuel ratio. (Possibly by interrupting fuel injection cycles)
This function was later provided within an updated DME relay, which is why it is not there in later cars. Some more research indicated it is indeed part number 944.615.915.01.
There is one for sale on eBay.co.uk for ~40usd.
END TEXT
Best to search up the rennlist forum entry .... following the post above there is another post that refers to a Porsche bulletin regarding fuel injectors... the fact that your car runs with it and barely runs without it suggests this may be related.
DavidL
Active member
Odd the link doesn't work as I read it first.
Anyway try this
https://rennlist.com/foru...the-mystery-relay.html
Anyway try this
https://rennlist.com/foru...the-mystery-relay.html
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