fuel pump question.

liljoe07

5 Year Member

Feb 18, 2009

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Cartersville,Ga

Nov 23, 2009

#21

• Nov 23, 2009

• #21

Look above it and below it.....LOL its there. Stick you hand up beside the dash where the ECM would be and feel around.

 

B

Betschart-91gt

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Nov 12, 2009

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Roy, washington

Nov 23, 2009

#22

• Nov 23, 2009

• #22

haha alright ill give it a shot.
what exactly does it look like? is it similar to the fuel pump relay? or do wires come out from both ends of the relay?

thanks

 

liljoe07

5 Year Member

Feb 18, 2009

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Cartersville,Ga

Nov 23, 2009

#23

• Nov 23, 2009

• #23

Looks just like the fuel pump relay. Going by your other thread, you may not have one installed.

 

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Betschart-91gt

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Nov 12, 2009

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Roy, washington

Nov 23, 2009

#24

• Nov 23, 2009

• #24

yeah kinda seems like it
do you know what color wires go to that relay?

thanks

 

liljoe07

5 Year Member

Feb 18, 2009

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Cartersville,Ga

Nov 23, 2009

#25

• Nov 23, 2009

• #25

Assuming you have a 91 harness.

Red wire
black wire
Red w/ green stripe wire
yellow wire.

 

B

Betschart-91gt

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Roy, washington

Nov 27, 2009

#26

• Nov 27, 2009

• #26

alright so i found my eec relay and it had no relay on it so i put a new one on and still nothing.....?

 

HISSIN50

"How long does it take to get help in here?

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Nov 29, 1999

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Nov 27, 2009

#27

• Nov 27, 2009

• #27

Did you test the terminals at the relay socket to ensure that you had all the proper values?

 

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Betschart-91gt

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Roy, washington

Nov 27, 2009

#28

• Nov 27, 2009

• #28

how many wires from the relay are suppost to have power to them?

thanks

 

HISSIN50

"How long does it take to get help in here?

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Nov 27, 2009

#29

• Nov 27, 2009

• #29

Betschart-91gt said:

how many wires from the relay are suppost to have power to them?

thanks

Click to expand...

With the ignition on, 3.

Ignition off, 1

 

S

seedeezy

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Nov 27, 2009

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Nov 27, 2009

#30

• Nov 27, 2009

• #30

disregard my post, i didnt catch that you don't have power at the inertia switch. Let me think on this a bit before I make another wack suggestion.

 

R

real57vetteguy

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Nov 17, 2009

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Apr 18, 2010

#31

• Apr 18, 2010

• #31

re somewhat the same problem

I have looked over this post and my problem is somewhat close, my fuel pump is not coming on at all, i ram a jumper wire at the relay under the seat and it did come on, I found the fuselink on the blue wire under the hood was blown, I replaced the fuselink with an inline 25 amp fuse, each time I turn the switch over it blows the 25 amp fuse leading me to believe that the blue wire (which turns into a yellow wire and runs to the EEC computer at the passenger side kick panel has a short or ground, when i test the block 22 port i come up with no power. Any ideas or suggestions???????

 

HISSIN50

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Apr 18, 2010

#32

• Apr 18, 2010

• #32

Vetteguy, I don't have a diagram handy for a 91 but:

I might disconnect the Fp relay and see if you blow the fuse. If you do, the issue is elsewhere in the circuit as you noted. If not, but it blows when you reinstall the FP relay and cycle the key, the short is likely downstream of the normally-open FP-relay terminal (between the relay and the pump).

 

R

real57vetteguy

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Nov 17, 2009

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Apr 18, 2010

#33

• Apr 18, 2010

• #33

re

When I pull the test port and try to check power to block 22 which i assume is to the computer it is reading nothing, also the blue 20ga wire coming off of the solenoid that turns to yellow runs to the computer ecc power relay I assume this is all tied in together? could this be the wire that is causing all my problems? I thought about just pulling a new wire to the computer or power relay at the computer and seeing if that might solve the issue. Do I seem to be on the right track or way off?

 

HISSIN50

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#34

• Apr 18, 2010

• #34

22 will read continuity to ground when the FP is on (the EEC grounds that wire or you can ground it manually at the self-test connector in order to make the pump energize).

 

oldskolbus

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Apr 30, 2002

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WV

Apr 19, 2010

#35

• Apr 19, 2010

• #35

check the fuselinks with a meter. They can blow and look fine on the outside. Check for power on both sides of the link. I had one that looked fine but the wire broke on the outside of the link. Mine was the power wire to the computer so nonthing had power.