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engine swap now gas pump wont start

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Old 06-12-2014, 06:51 PM
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Car: 88 iroc-z camaro
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: idk
engine swap now gas pump wont start

im new here and need help with my 88 iroc-z. it has 198,000 miles so i opted for an engine and tranny swap. i put in a new block and a tranny from an 89. my friend helped me time it but now the fuel pump wount prime. the new engine dose not have all the emissions stuff anymore. i have tried replacing a bunch of stuff but it still will not get fuel. please help. any ideas are welcome.
Old 06-25-2014, 05:38 PM
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Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Not Ready 4 Prime Time

To test the relay and pump simultaneously use a spare piece of wire and jump the orange wire to the green wire with the white stripe.

Did you hear the pump run when you did that?


Happy Racing !



When you see fog or “running” lights on in good weather beware. WLow performance driver ahead.

Old 06-25-2014, 10:31 PM
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Car: 88 iroc-z camaro
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: idk
Re: engine swap now gas pump wont start

i ran a wire from the battery to the fuel pump port on the computer connection under the steering wheel and the pump kicks on. it just wont prime when i turn the key.
Old 06-30-2014, 08:37 AM
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Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Not Ready 4 Prime Time

Originally Posted by camsuper
it just wont prime when i turn the key
With the car OFF, using a voltmeter with long leads so you can see it in the cockpit, probe the green wire with a
White stripe at the pump relay.

Now turn the key to the RUN position.

Did the voltmeter show voltage?

If no, there is a faulty ECM or bad connection going to it.


Happy Racing !



8 Wheels Corner Better Than 4, If You’re On The Outside You Have Fair Warning

Old 07-06-2014, 04:31 PM
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Car: 88 iroc-z camaro
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: idk
Re: engine swap now gas pump wont start

so i figured out what is wrong with my car totally by accedent. i bought a new computer for it but put the old one back in and it fired right up. so i guess i just reset it.
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