[Main 9000 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos That may not be the fuel pump Like This Post: - Subscribe to Daily Digest for this Bulletin Board Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Thu, 15 Jan 2009 05:01:58 In Reply to: It does, AdamB [Profile/Gallery] , Wed, 14 Jan 2009 14:20:25 Alert me when someone posts in this thread: Members do not see ads below this line. - Help Keep This Site Online - Signup

OK, a lot depends on the year of the car-
The pump only runs if the crank position sensor senses the engine is turning. HOWEVER, it will run for about 2 seconds when the key is first turned to ON. It doesn't run until pressurized - there is no fuel pressure sensing.

The pump runs for a second or two to get some fuel into the system before starting. But as a safety measure, the fuel pump doesn't run more than a couple of seconds if the engine isn't spinning (or to Marvin's point, if the ECU doesn't know the engine is turning because of a bad CPS).

My guess is fuel pump and/or fuel pump relay, with the CPS following. Since you 'got back to the airport,' I assume the car had been sitting a few days. The fuel pressure would have leaked down, but there would be some residual pressure. The car started on that, and you were out of luck. A common problem when a fuel pump quits is the car starts, runs for a few seconds, then dies. It might restart again once or twice more, and immediately choke out as the remaining fuel pressure drops.

The start, then die, isn't typical of a DI or CPS. Doesn't rule them out, but I'd play the percentages.

Frozen fuel line is possible, but today most fuel has up to 10% ethanol in it already (thanks to Cow Country congresspersons). That actually makes for a pretty good drygas. If the tank was quite low and there were good temperature swings, you might have accumulated an ice plug somewhere.

Most probably a bad pump. Oh well.

posted by 192.249....

• Looks like it's fuel pump time, Noel, Wed, 14 Jan 2009 13:14:46
  • And the verdict is in. Fuel pump!, Noel, Thu, 15 Jan 2009 15:15:41
  • I did this a couple months ago..., PGAero , Thu, 15 Jan 2009 08:43:39
  • On the bright side..., Rod , Thu, 15 Jan 2009 05:30:24
    • Yep. Could have been on, Noel, Thu, 15 Jan 2009 06:56:00
  • Did you try banging on the bottom of the tank with a, TonyJ , Wed, 14 Jan 2009 18:23:41
  • Will it run on starting fluid?, marvinstockman, Wed, 14 Jan 2009 16:03:14
  • Um, don't think 9000 fuel pump runs at key on., RayF, Wed, 14 Jan 2009 14:10:04
    • You can hear the pump cycle when you turn the key on, Noel, Wed, 14 Jan 2009 14:23:36
      • Don't discount frozen gas, Bill Homer , Wed, 14 Jan 2009 16:24:16
    • It does, AdamB , Wed, 14 Jan 2009 14:20:25
      • That may not be the fuel pump, Ari , Thu, 15 Jan 2009 05:01:58 <-- Viewing This Message
        • Exactly my logic, Ari., Noel, Thu, 15 Jan 2009 06:43:48
  • Could it be just frozen gas line ? n/m, TKC, Wed, 14 Jan 2009 13:37:45

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