Re: Fuel Pump Fail? Do These Symptoms Confirm It? - Saab 9-5 Bulletin Board - Saabnet.com
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Re: Fuel Pump Fail? Do These Symptoms Confirm It?
Posted by Dean (more from Dean) on Mon, 30 Aug 2010 06:54:09
In Reply to: Fuel Pump Fail? Do These Symptoms Confirm It?, RegQ, Sun, 29 Aug 2010 16:01:49
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With the I4 engine, uncertain about the V6:
At ignition on, the pump is energized for a couple of seconds as you observed. When you crank the engine, the ECU turns on the fuel pump via the fuel pump relay when the CPS indicates that the engine is rotating. Otherwise, if there isn't a CPS signal, the ECU has no indication that you are attempting to start the engine and the pump remains without power. The ECU also thus does not create any diagnostic codes.
The CPS may be the problem.
posted by 68.91.152...
Posts in this Thread:
- Fuel Pump Fail? Do These Symptoms Confirm It?, RegQ, Sun, 29 Aug 2010 16:01:49
- FOLLOW-UP. Fuel Pump Fail. More Tests., RegQ, Wed, 1 Sep 2010 12:42:59
- Re: Fuel Pump Fail? Do These Symptoms Confirm It?, SWEDECAR , Mon, 30 Aug 2010 21:13:26
- Re: Fuel Pump Fail? Do These Symptoms Confirm It?, Dean, Mon, 30 Aug 2010 06:54:09 <-- Viewing This Message
- Must be Pump. 12 VDC found right at pump connector., RegQ, Sun, 29 Aug 2010 20:17:05
- Re: Fuel Pump Fail? Do These Symptoms Confirm It?, Rich02818, Sun, 29 Aug 2010 20:16:21
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