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  • Key
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  • Run
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  • Back
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  • Come
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  • Fuse
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  • Lift

Question

rough idle on ''93 6.5 turbo diesel replaced o- ring on fuel heater. and replaced all fuel lines going to fuel filter housing. there are no leaks that i can find pulled the filter after running for about 30 minutes ands there was barely any fuel could lift pump be failing?

Submitted: 459 days and 4 hours ago.
Category: Chevy
Value: $9
Status: CLOSED
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Optional Information:
k2500 Chevrolet 6.5td

Posted by Gary 459 days and 4 hours ago.

Info Request

Hi, does your engine smoke at all?At idle or under load?

459 days and 4 hours ago.

Reply

no just when i start it for about 5 seconds

Posted by Gary 459 days and 4 hours ago.

Answer

You could possibly have a faulty lift pump. The truck can start if the system is primed with a lift pump inop. the lift pump puts out 9-11psi. One way to check is to shut off engine, key on, loosen the bleeder on your filter housing, and power the lift pump to check output.please ask if you have any more questions Thanks... Gary

459 days and 4 hours ago.

Reply

Reply to Gary's Post: do i turn the key back on to repoweer the pump and should fuel come out if the pump is working properly

Accepted Answer

With the key on, remove the cover on your firewall on the passenger side, you will find a black fuse holder to the left, remove the fuse from the cover, leaving the fuse plugged into the wires, this is the lift pump fuse. Crack open the bleeder, and touch the tip of the fuse to the electrical stud mounted right next to the fuse. This is a power stud, it will power up your pump,and it should run, and pump out of the bleeder with some pressure.Thanks...Gary

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Expert: Gary
Pos. Feedback: 96.2 %
Accepts: 150
Answered: 8/6/2008

ASE Certified Technician

ASE Master Truck Technician,20 Years GM Shop Foreman,Fully Trained GM Trucks Light and Heavy.

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