fuel pump - Team Camaro Tech
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post #1 of 6 (permalink) Old Jun 29th, 04, 04:35 PM Thread Starter
 
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i have an 86 iroc body and droped an older 350 now a 383 engine in it everything went well till i notice there is a fuel pump in the rear(tank) but mine ia a mechanical pump up front..question is: what should i do here? taking the tank out on this car nightmare...the exsisting pump is not connecting as per i didnt need all the wiring harness. looking for any ideas here thanks all!

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post #2 of 6 (permalink) Old Jun 29th, 04, 04:40 PM
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if you can get to the wire for the intank pump and it works use it. Take the mechanical pump off and block off the port. Save some engine wear and get some ponies back.

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post #3 of 6 (permalink) Old Jun 29th, 04, 04:55 PM Thread Starter
 
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ok also there a return line what should i do with it plug it? and the wire should i put it on a toggle switch and use a pressure regulator?

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post #4 of 6 (permalink) Old Jun 29th, 04, 06:00 PM
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First off, I would also post this message on;

www.thirdgen.org

But, in the meantime, what was the original setup in your 86? I am ASSUMING it was a TBI... but it could have been a TPI setup, I guess. If it is the latter, you would be running about 42 PSI pressure in your feed line, and the return line was of course REQUIRED. If you are running a carbureted version now, then you only need 5-7 PSI pressure to a CARB... and no return line. Disable/remove, or BYPASS your in tank pump. Connect your current, installed feed line to the carb, and remove/plug/whatever, your return line.
The "beauty" of a carb setup in my mind, is the simplicity/low pressure of it. I have an 87 IROC with the TPI setup... it is great, but much more complicated. A fuel relay on the drivers side comes on with the ignition "on", for aprox. 1.5 seconds, I installed a fuel pressure regulator to "adjust" pressure for conditions, and the injectors require periodic maintenance/replacement, and will often need TOTAL replacement with upgrades in engine... such as yours, a 383.

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post #5 of 6 (permalink) Old Jun 30th, 04, 01:00 AM
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Remove the fuel pump relay in the engine compartment. Its located drvr side, by the hood hinge. The fuel pump is an axial type type meaning fuel will flow through it if pumped by another pump, ie, mechanical pump.

The return line can be plugged. If the charcoal cannister is still in use, good deal. Make sure the system works good. If not going to use the charcoal cannister, plug all the lines, then get a vented gas cap.

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post #6 of 6 (permalink) Old Jun 30th, 04, 02:25 AM Thread Starter
 
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thanks so much guys for the help..not sure what setup was in there before me i bought it as a rolling chassis but the direction im going to go with is to plug off the return, and the canister and use a vented cap seems to be the simpliest...anything to not have to pull the tank!... btw the way this is a great site i have found answer to many question i've had without haveing to post at all...keep it up!!!

i am the bad things that happen to good people!<br />86 iroc 383 stroked and charged...
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