The transfer pump is a commom problem and the symptoms being described could be a number of theings. But I'd rule out the common ones first. The only reason why I'm pretty sure its the transfer pump is because I've had to replace them on each of my Jetta GTXs. Transfer pumps act differently when they're on their way out. If you do decide to change the transfer pump I would recomend getting a Pilberg (sp?) pump, they're less expensive than the Bosch ones.
Keep us informed. Mark Reda. ----- Original Message ----- From: "Holland Phillips" <[email protected]> To: "Barney Culver" <[email protected]> Cc: <[email protected]> Sent: Wednesday, April 02, 2003 4:07 PM Subject: Re: [a2-16v-list] 16v problems HELP!!! > The first thing to do is dump the ECU fault codes. Depending on your > car's date of manufacture, there are two ways to do this. One requires > making a simple harness with a momentary switch, LED (and resistor to > drop the +12 to +5 vdc, unless you get a +12 LED from someplace like > Radio Shack), and some connector pins (either real ones from VW or made > from regular male spade connectors), the other, just the switch and > connector pins (this method uses the "Check Engine" light instead of > the LED). The Bentley shows how to make/connect the harness, as well > as how to read the codes. > If your car is running as bad as you say, there just about has to be > some fault codes stored. These codes can be VERY useful in determining > where the problem lies. See Section 5, pages 12 and 13 in the Bentley. > > On Tuesday, Apr 1, 2003, at 14:48 US/Pacific, Barney Culver wrote: > > My '91 GTI 16v is having some issues. After it warms up and runs fine > > for a > > while it all of a sudden runs very rough and has no power at all and > > sometimes > > stalls. After an inconsistant amount of time it all of a sudden has > > power again > > (almost as if it has an electrical short somewhere). Also when this > > happens, I > > noticed that the fuel pumps (both still running) make a higher sound > > as if a > > load were taken off of them. So far I have replaced the hall sender > > plug, the > > potentiometer plug (sp?), and the mass air flow sensor plug (I think > > that's the > > one I replaced...it's directly accross the airbox from the > > potentiometer plug), > > and the problem is still there. This is the last hope before sending > > it off to > > the shop and letting them go fishing. > > > --Holland > [email protected] > > _______________________________________________ > a2-16v-list mailing list > [email protected] > http://mail.a2-16v.com/mailman/listinfo/a2-16v-list > For list archives, see listinfo link above. >
