Re: Still uncertain if I made the right decision... - Saab 9-5 Bulletin Board - Saabnet.com
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It's not a bad idea to take a quick sample of the fuel pump wave form when you come up to those mileage on the original pump.
As long as the shop have the labscope and know how to use it, it is a fairly quick procedure.
The left picture is a wave form from a fuel pump that was dead but scared back to life with a knock on the tank. The right is a new pump.
The signal dropping all the way down to zero is when the carbon brushes loose contact over the copper commutator (flat spot) and this happens sooner or later to all brush motors like blower motor and fuel pump and such.
Anders
SWEDECAR
Posts in this Thread:
- My 2000 SAAB turned into a FORD today, MI-Roger , Sun, 13 May 2007 15:24:06
- Discouraging news..., Herb Hirsch , Sun, 13 May 2007 19:50:29
- Still uncertain if I made the right decision..., MI-Roger , Mon, 14 May 2007 03:19:50
- Re: Still uncertain if I made the right decision..., SWEDECAR , Mon, 14 May 2007 13:41:51 <-- Viewing This Message
- $811 out the door for new fuel pump...., MI-Roger , Mon, 14 May 2007 09:09:46
- your choice, cheap part or cheap labour..., LesH, Mon, 14 May 2007 08:12:09
- Re: My 2000 SAAB turned into a FORD today, Mr. Science, Sun, 13 May 2007 16:47:02
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