speed sensors

[comicbook8@gmai]

hi all ,
just a quick one on the sensor, does any body know if the 89 s2 should have 1 sensor on the bell housing or 2 ,mine only has 1, but on the p.p cat it says 2 per car , 1 only for the 968 ??
i asked this question a couple of months ago and got a reply that it only supposed to have the 1 , so i just wanna be sure im having a starting issue which could be related.

[comicbook8@gmai]

is there any reason the p.o would have removed speed or referance sensors ? im not sure which one is still in there but i have tach bounce when cranking ,it starts but just takes 7 or 8 cranks to fire when left sitting for a while .starts perfect when engine is hot, does the sensor only do its thing when engine is cool ? not when hot ??

[FRANKYDOOM]

My 89 S2 only got one as well - I was just looking on PET and it sys 2??? - Can anybody with a 89 please check ???
Ohhhhh - mine takes about 5 cranks before start - hot or cold. Im just trying to find a fix - i cleaned all the ground points - and also cleaned starter up - still very slow.....
Thanks

Frankydoom

[hpservertech]

Does it's thing all the time, not just at start.

[jpk]

If it needed two sensors and only had one, it wouldn't run. I think all of the 16 valve cars used a hall sensor on the distributor instead of the refrence sensor on the flywheel.

[comicbook8@gmai]

thanks guys appreciate the replys
mine is a 1989 s2 and it defo has only 1 sensor on bell housing !

[Outback Porsche]

It sounds like you may be loosing fuel pressure while it's sitting, and it takes a few cranks (7 - 8) before the pressure is back up again. I gather that it starts quicker if not left for long? If this is true, it's unlikely to be the sensor. More likely something in the fuel path.

[comicbook8@gmai]

yeah been down the fuel rd. changed f.p.r, fuel pump check vale ,and it passed the leakdown test with flying colours !it only started happening consistantly when the weather got a bit warmer,on frosty mornings it would fire first crank so it points to some sort of thermostat fault. . . . . . . . . . . . . . . .
just went out to try it mid message ,second time since i changed the stat, first time it didnt seem much differant but this time i tried it according to manual no touch gas pedal ,she fired right up ! but no way im calling it this early a bit cooler out this eve aswell , so not overly confident but ya never know. even a dogs arse gets a bit of sun every now and again ,fingers crossed

[Outback Porsche]

Yeah, just read your other post. looks like all you have left to change out in the fuel path is the damper.

Hope you've fixed it.

[comicbook8@gmai]

thanks jeff !
i hope its it but ,what am i going to spend time and money on then ???? the wife? nahhh
ACCESSORIES YEAH !!!!!!