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Getting spark but no fuel.. need help

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  #21  
Old 08-08-2017, 09:53 AM
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Do you get power back to the pump with the jumper in place? Does the pump have a good ground?
 
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Old 08-08-2017, 11:14 PM
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Originally Posted by HeyYou
Do you get power back to the pump with the jumper in place? Does the pump have a good ground?
No power back to pump and where can I find the ground for the pump?
 
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Old 08-08-2017, 11:18 PM
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I should add when I put the multi meter in the fuel relay it read 12.0 volts but when I put the multi meter to the green/blk wire leaving the relay it read something like 0.16
 
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Old 08-09-2017, 10:35 AM
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Pin 30 in the relay socket should always have 12 volts. (fuse 8 in the PDC, 20 amp)

Pin 86 should have 12 volts when the ignition is on. (fuse 9 in the side of the dash, 10 amp.)

Pin 87 is controlled by the PCM, PCM grounds that circuit to engage the relay, and run the pump.

Make sure you have voltage where it should be, key on, engine off.

See if the PCM actually grounds the control side of the relay when you first turn the key on. (having an extra set of hands makes this easier.)

See what ya got.
 
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Old 08-09-2017, 01:30 PM
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Originally Posted by HeyYou
Pin 30 in the relay socket should always have 12 volts. (fuse 8 in the PDC, 20 amp)

Pin 86 should have 12 volts when the ignition is on. (fuse 9 in the side of the dash, 10 amp.)

Pin 87 is controlled by the PCM, PCM grounds that circuit to engage the relay, and run the pump.

Make sure you have voltage where it should be, key on, engine off.

See if the PCM actually grounds the control side of the relay when you first turn the key on. (having an extra set of hands makes this easier.)

See what ya got.
ok so with my multi meter put black in pin 30 what about the red?
 
  #26  
Old 08-09-2017, 01:40 PM
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Ground black somewhere, battery is fine, red probe goes into pin 30.
 
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Old 08-10-2017, 04:03 AM
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Ok. Pin 30 had 12 volts but with engine cranking it dropped to 10 volts.
Pin 86 was @12 volts ignition on
and pin 87 shows nothing with ignition off and on.
 
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Old 08-10-2017, 08:27 AM
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Ok, that all sounds good.

Did you test 87 with the relay installed?
 
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Old 08-10-2017, 02:17 PM
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No I did not how would I do that by putting a piece of wire in the 87 slot and putting the relay back in and test that wire.
So with the testing I did this morning does that indicate that the computer is good?
whats the next step? I really appricate you taking the time to help me.
 
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Old 08-10-2017, 02:38 PM
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Well, it seems that everything that is supposed to, is getting power, but, you still aren't getting power back to the pump..... that implies that the PCM isn't triggering the relay..... Maybe...

So, try this trick: Put the red probe on the batter positive terminal, stuff the black probe into pin 85 of the relay socket, and have someone else turn the key to "On". You *should* see 12 volts for about 3 seconds.
 



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