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Here's the answers to some of your questions, Jim... >If this is the hose to the Air Cleaner, then this should not change >anything. > >Check the hose to the pressure sensor, and make sure it is attached on both >ends. I was talking about the hose to the pressure sensor. When I pull this off, the car seems to idle correctly, and I do notice quite a little vacuum created by the pressure sensor when I remove the hose from the top of the AID. >Do you have a voltmeter? If so, measure the voltage across the battery with >the engine warmed up after a drive and the engine running at medium rpm. It >should be above 13.5V. I have a voltmeter, and I'll do this next time I go to town (should be later today for lunch). I'm thinking perhaps my voltage is too low when the problem is happening, because when it's idling very slow, my headlights are very very dim. Also, when it's swinging from a normal RPM down to the low RPM range the generator and the brake warning lights come on. Is the low voltage causing the erratic idle, or is the erratic idle causing the low voltage. I'll take a measurement next time I'm out and let you know what I read. >Do you hear occasional clicking sounds from under the back seat while >you're driving? No clicking sounds when I'm driving (outside of the normal FI clicks when I turn the key to the first position). Thanks, Jacob Schroeder '72 FI Squareback -----Original Message----- From: Jim Adney [mailto:jadney@vwtype3.org] Sent: Wednesday, May 05, 2004 9:35 PM To: type3@vwtype3.org Subject: Re: [T3] On 5 May 2004 at 13:35, Jacob Schroeder wrote: > 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. This doesn't ring any bells, yet. Maybe we need more description. > 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. Try using a long tube to listen thru, or a screwdriver with the blunt end in one ear, to pinpoint the sound. OTOH, like you say, there may not be anything there that is unusual. > 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. If this is the hose to the Air Cleaner, then this should not change anything. Check the hose to the pressure sensor, and make sure it is attached on both ends. > 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). Do you have a voltmeter? If so, measure the voltage across the battery with the engine warmed up after a drive and the engine running at medium rpm. It should be above 13.5V. Do you hear occasional clicking sounds from under the back seat while you're driving? -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org