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Thats the odd part about the 4s- they switched from D-Jet (pressure sensor) to L- Jet (Mass airflow) in mid year of 1973....those weirdos,.... -rj >---------- >From: Robert K. Kuhn[SMTP:kealoha@hooligan.cc] >Sent: Friday, April 23, 1999 4:51 PM >To: Luis A. Pieretti; vwtype3.org >Cc: VintageVW List >Subject: Re: Long pause for FI > >At 01:39 PM 4/23/99 -0700, Luis A. Pieretti said... >What year is this Type-IV? > >The first thing that comes to mind is the mass air flow sensor. I believe >iÒwÜ|e. It should be a black box looking thing. Inside is a flap and >a sensor. The sensor controls the flap which allows the amount of air that >enters into the throat. I don't have my manuals here with me so I could be >thinking about a different FI system. > >The timing could be too far advanced too. I've known people to do this to >adjust the idle, believe it or not. And for that matter, the idle >adjustment just might be out of whack too. > >There's also a chance that you have a vacuum leak but these usually cause a >rough idle. > >I also don't know if this engine has a WOT sensor. If it does, it will be >a simple micro switch. Though this usually causes the FI to run a bit >richer when they go out of whack which I guess could cause a high RPM at >idle. > >HTH! > >Robert K. Kuhn - http://www.hooligan.cc > ICQ # 3714283 (nickname: godzilla) > >------------------------------------------------------------------- >List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org > >