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Old 04-08-2008, 05:39 AM   #1
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fuel issues ??

I think I might have some fuel issues. I have 12 psi of fuel pressure, the plugs show that there is a lean condition across the board. I replaced the intake gasket and the tbi gasket because of a low vac reading ( I am asuming from to much cam) the truck runs great finaly will out run a vortec v6 0-55mph (first run was before replacing MAP, egr, o2, plugs&wires, Cap&rotor, IAC, and rebuilt the TBI.

my main problem is the stumbling and stalling as well as when i test the fuel pressure it dose not hold any pressure. I had to have the motor running inorder to get a reading.

this is on a 92 2500 350 auto.
cam specs unknown 15in. hg. vac reading warm in Netural.

thanks Justin
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Old 04-08-2008, 06:18 AM   #2
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did you rebuild the motor or something? and did you you put a much bigger cam in it to try and gain extra hp? if so then you need more fuel. a bigger cam requires more fuel and more spark and retard timing.
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Old 04-08-2008, 04:26 PM   #3
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doesn't that fuel system bleed itself down by design with eng off? That's what I understood.
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Old 04-09-2008, 12:17 AM   #4
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Quote:
Originally Posted by crabtruck View Post
doesn't that fuel system bleed itself down by design with eng off? That's what I understood.
i though that too
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Old 04-09-2008, 06:50 AM   #5
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yes it does. but if you are running lean and low vac. did you change the injectors with the bigger cam?? and add a vac canister to help with the vac system. so what i'm saying is you can not change one thing and get it to work proper with out changing anything else
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