ivai

Is this normal? I had been noticing a dramatic vacuum leak since I installed my Vitesse Chips and 38mm tial WG, and it was just getting worse. Today when I fired her up, I heard a distinct air wizzing sound and the gauge read that I had no vacuum whatsoever except for when coming down from revving it, but then at idle (which was really high.. about 1500rpm) it went back to zero.

I discovered it was the idle screw, called porsche, bought one for $3.70 and put it back on -- good as new!

Question is, is it a really good, bad, or normal sign that my engine ran still only with a really high idle with this condition?

Anyone else had experiences like this?

daniel951

my idle screw poped out before too and u can just hear a whistle. i just put a bolt in there for now and haven't had time to order one lol. and it runs good.

mark944turbo

normal, you would just be running a little lean under vacuum and a little rich under boost. Not a problem.

ivai

Daniel, if theres a Porsche dealership near you you can probably just pick one up from them... The one here had three on stock and they're cheap too.

Brigand

At the track we just put a peice of tape on a few times to maintain boost as this back its self out regularly. leaves a black mark under the hood, if no sound / heat deadener

Brigand

CanyonBlaster

I had same thing, I found my original idle screw sitting on the engine !?

The guys on this site said to just put a small rubber o-ring in there along with it (Ace hardware - 25 cents). I haven't had any probs since; it stays put.

hosrom_951

My car wouldn't idle when i forgot to install the idle screw, it would start up, hesitate, drop several rpms and just die.

Luis de Prat

Don't forget to adjust the idle after replacing that screw, or the revs may dip too low when braking from having it on too tight. Very annoying.

daniel951

i just need a denver rennlist member order one for me and mail it to me . just have to pm a couple of them.

Mike1982

Mine came out going to meet up some porsche guys in cleveland. Drove fine on the way up on the highway, slowed down to get off the highway and drove like CRAP! The idle keep dropping LOW, like tring to stall. So I had to heel and toe (one foot to slow me down, the other to keep a 1,500 rpm so it won't stall) until I got to his house. I just bought a bolt to use as a temp then picked up a new one from the dealer the next day.

ivai

I tightened it up all the way, but it still idles about normally... I tend to think that this is caused by my *other* vacuum leaks that I have yet to fix (suspects: throttle body, ISV, brake booster) Hopefully I'll have these all fixed within the next week or so... Then I'll have to adjust the screw so idle isn't too low.

Porschefile

You can also wrap the threads in teflon tape for a tighter fit when installed. I know because I lost 2 screws due to worn o-rings.

FAST44

I don't think you can buy just the screw from Porsche, at least that was the case a few years ago. There is a direct replacment screw from VW. I don't know the number off hand . Do a Google search To find the proper number.

hosrom_951

Click Here

jimbo1111

There is a porsche factory plastic cap to prevent it from backing out. Maybe someone could post the part number.