24 Valve Engine and Drivetrain Discuss the 24 Valve engine and drivetrain here. No non-drivetrain discussions please. NO HIGH PERFORMANCE DISCUSSION!

lift pump operation

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Old 09-25-2012 | 09:26 AM
  #1  
dkenny's Avatar
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Question lift pump operation

this might be dumb question.
when I turn my key to the run position is the lift supposed to run without a delay? at the moment I have about a 5 second delay before the lift pump turns runs.

would there be any problem with wiring the relay to a key on source instead of the ECM? I would also add the circuit to turn off the pump while its cranking.

thanks for the info
-dkenny
Old 09-28-2012 | 05:34 PM
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From: Houston
I think the lift pump does not come on until you bump the starter, then it runs for 5-10 secs. It seems to fire up when you start the motor, I watch the FP rise very quickly.
I see no reason to change anything, unless it is broke, my $.02
Old 09-28-2012 | 08:35 PM
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supr...just this morning I noticed the delay was gone..I haven't changed a thing other than to wait until FP is up..then crank..

I was going to post this..but this afternoon the delay is back??

anyone else have any thoughts?

I do agree about not doing anything until it breaks. I would like a plan when it quits..I know I have to jump the AirDog relay to get home..no problem there.

-dkenny
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