Fuel Pump? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 11 (permalink) Old 03-25-2012, 12:09 PM Thread Starter
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Fuel Pump?

Do our cars have a separate sending unit(aka the big sucker underneath rear suspension) besides what's in my fuel tank. Cause I had a fuel pump put in cause stock was leaking and new one is defective and I bought a new one and its sitting at home. Just wanna know if there is a seperate unit. And my fuel pressure dumps it 5 grand when I really give it some go. I have bolt ons minus aftermarket headers and no tune. I am thinking its my fuel pressure

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post #2 of 11 (permalink) Old 03-25-2012, 03:45 PM
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Wrong section

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post #3 of 11 (permalink) Old 03-25-2012, 05:50 PM Thread Starter
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ok. mod kill this i'll repost in problems

Mods-Zzp downpipe,n1 catback exhaust, custom intake,2000 watt ????? smoked the pyle of shyt, 2 12" boss phantoms.
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post #4 of 11 (permalink) Old 03-26-2012, 05:45 AM
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I just moved this thread and deleted the other one.

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post #5 of 11 (permalink) Old 03-26-2012, 04:19 PM Thread Starter
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ok cool thanks. well hopefully i get an answer to this question now lol

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post #6 of 11 (permalink) Old 03-26-2012, 07:37 PM
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Not sure I understand your question though. Fuel pump is in the tank, sending unit is just a potentiometer mounted on a float also in the tank. Only thing outside the tank is the EVAP canister and fuel filter. If your in a California car even the fuel filter is in the tank.

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post #7 of 11 (permalink) Old 03-26-2012, 08:05 PM Thread Starter
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ill post a pic cause i cant imagine my evap canister being this big.... it looks triangular shaped and its right under the bumper by the rear suspension..... my evap canister wouldnt cause my car to trim at 5k and also not allow me to go below a 1/4 of a tank.

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post #8 of 11 (permalink) Old 03-26-2012, 08:29 PM
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What happens at žtank?

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post #9 of 11 (permalink) Old 03-26-2012, 08:42 PM Thread Starter
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bad things lol..... well i lose fuel pressure at about 3 grand if i really give it some juice and anything below a 1/4 of a tank it will stall out like its empty but its not.......its weird so i have been keeping it above a 1/4 of a tank... i was under assumption that venture pump was defective so i am only getting a bleed pressure of i guess like 3 psi..... i dont know what the actually pressure is supposed to be i think its 6 but not sure...... my cel isnt on and i am getting horrible mileage...... 18 city and like 25 highway... i mean i might need a tune. my bolt ons are as listed below in my sig.....

Mods-Zzp downpipe,n1 catback exhaust, custom intake,2000 watt ????? smoked the pyle of shyt, 2 12" boss phantoms.
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post #10 of 11 (permalink) Old 03-26-2012, 08:57 PM
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Sure sounds like fuel pump....

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