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7 stupid questions / 84 DL wagen related to fuel pumps, idle and rust. 200

posted by  matt82dl on  Wed Nov 13 03:14 CST 2002
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last visit: Mon Oct 13 10:46 CST 2014
[RELATED]

1.) Yes, but it should be a steady buzz
2.) Probably not, see #1
3.) Most likely, or a bad fuel delivery tube, or clogged filter sock
4.) Pull fuse #7 (for the intank pump), see what happens to the main pump noise. Louder with fuse pulled, intank pump maybe working, no change, intank pump most likely has a problem. Does main fuel pump noise change with full tank vs. almost empty tank?
5.) Could be a number of things, a) leaky windshield trim, b) missing grommet in firewall, c) clogged sunroof drains, d) clogged rocker panel drains. The good thing is, if the rust hasnt gotten to close to the driveshaft tunnel or the rocker panels, you can repair it. Easiest way to diagnose is to rip out the seats and carpet -(only takes 15min, really) then have an assistant go to town w/ the garden hose. Search the archives or faq for details on rust and leaks.
6.)I would try Mr. GTs suggestions for adjusting the base idle AFTER you clean the idle control valve.
7.) Dont know, but it is probably a test point.


Hope this helps.

Matt

--
'82 DL - 150k, '93 945 - 96k






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