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Sounds like an electrical intermittant... perhaps to the temp sensor on the head. Ill send you the FI FAQ Keith Keith Park Top Notch Restorations topnotch@nycap.rr.com 71 Squareback 65 Notchback 65 Squareback 75 Opel 87 Golf 88 Rx7 10th Anniversary ----- Original Message ----- From: "Jacob Schroeder" <schroeder@purdue.edu> To: <type3@vwtype3.org> Sent: Wednesday, May 05, 2004 2:36 PM Subject: [T3] Erratic Idle Problems > My Square has been acting up recently, but not all the time. Occasionally > when I start my car, it'll idle very erratically. Sometimes it'll even die. > I'm quite concerned as it made it all winter without any such problems, I > would have thought she would have had more problems running in the winter. > Anyways, when I start it up, I can hear it oscillate between a normal > sounding RPM and a very low RPM, if I let it sit long enough, it will > usually swing low enough that it will die. Also, I've noticed if I keep my > foot on the gas I can keep the idle speed up, but if I just barely press on > the gas, there's a point where I can cause it to die. > > When the car is idling very slowly, I can hear a sound that either sounds > like rubbing metal or "swooshing" air. It sounds like that is coming from > the distributor generator area. I'm not sure if this is out of the > ordinary, or if it's typical noise that normally can't be heard over the > engine at normal idle speed. When I thought it was the sound of leaking > air, I checked all the hoses I could see, and none of them were loose. When > I pulled one hose off in particular, the problem seemed to go away. This is > when I pulled the hose off of the top of the Air Intake Distributor. This > hose leads from the top of the AID to the driver's side of the engine > compartment to a metal cylinder type object (I used to know the name of > this) which also has a connector on it like the ones that go to the > injectors. Don't know if this means anything either, just thought I'd add > it. > > I have also started to notice a significant decrease in fuel economy, when I > say significant, I mean it has dropped below 20 mpg (not quite accurate, as > I'm sure my speedo is a little off, so I'm guessing my odometer is as well). > > I have no clue where to start or what to look at. I was hoping you guys can > give me a starting point, or at least tell me what stuff to measure from the > car in order to report back to you. The oddest thing is, that other times, > when I start her up, she'll run fine, just like she's brand new. > > > Thanks, > > Jacob Schroeder > 1972 FI Squareback > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org > >