Author Topic: no fuel press?  (Read 2047 times)

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Offline shmed

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no fuel press?
« on: July 15 2018, 03:47:09 PM »
ok so I go to start the #@#$@  car\no start...
check  0 on fuel press gauge..
ok check fuses all good.
ok follow the chart from steves  site..  power to relay  yep  power to relay with key on yep (signal )
applied power to pump from alternator pump turns on..
hmm   ok  changed out oem relay still nothing...
whats strange is when I turn the key ahead I get a rattle type sound coming from the dashboard?
ideas...

Offline Steve Wood

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Re: no fuel press?
« Reply #1 on: July 15 2018, 04:08:35 PM »
Normally, it would seem the relay is no good but? Both fuses are good....

Is there a hot wire to the pump on the car?

Okay, when the connector is off the relay, you should be able to jump the  connector with a paper clip or wire, and the pump should run.  Does it? (pink/black to gray)

Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline shmed

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Re: no fuel press?
« Reply #2 on: July 15 2018, 04:49:40 PM »
ok   found it I swaped out the ecm now it works  I don't understand why  I had power an signal  power ?  #$@#$@  buick

Offline Steve Wood

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Re: no fuel press?
« Reply #3 on: July 15 2018, 04:55:10 PM »
Me either...my next suggestion would have to start it with the jumper in place and then check the green/white wire to see if it still had power on it with it running...

good you solved it!  We may all have to suck it up and go to aftermarket if the factory ecms get too flaky
Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline Forzfed

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Re: no fuel press?
« Reply #4 on: July 15 2018, 05:52:57 PM »
ok   found it I swaped out the ecm now it works  I don't understand why  I had power an signal  power ?  #$@#$@  buick
I was going to mention that!  I had the same issue and would jumper the pump to get home from the track or where ever it would stall.  Putting in a new ECM fixed that for me.

 

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