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When did Saab change to a pump precharge on starting?
Posted by Wingerr (more from Wingerr) on Wed, 8 Feb 2006 22:02:55
In Reply to: listen for the sound of the fuel pump ..., john Fitzgerald
[Profile/Gallery]
, Tue, 1 Nov 2005 11:17:27
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On my 93, there isn't any precharge of the fuel pump as the ignition is first turned on. It has to wait until cranking begins and it sees the CPS signal before the pump relay kicks on, so there's a lag there.
I tried a manual precharge once, by jumpering the fuel pump fuse to the hazard light fuse, before starting, and it fired up right away as opposed to the usual standard of several rotations before running up.
I'll have to try it again to see if it consistently does that with a precharge; then decide if I want to bother checking for excessive pressure bleed down when off. Probably more inclined to make my own circuit to perform the precharge automatically when the ignition is turned on-
posted by 68.237.40...
Posts in this Thread:
- How many times does it crank? Maybe I'm just, Noel, Tue, 1 Nov 2005 05:17:49
- Re: How many times does it crank? Maybe I'm just, soneway, Tue, 1 Nov 2005 20:56:33
- listen for the sound of the fuel pump ..., john Fitzgerald
, Tue, 1 Nov 2005 11:17:27 - Did you change your fuel filter lately ? n/m, TKC, Tue, 1 Nov 2005 07:09:38
- Re: How many times does it crank? Maybe I'm just, Ari
, Tue, 1 Nov 2005 05:37:46
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