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Corvette Forums - Corvette Enthusiast Site (https://www.corvetteforums.com/forum/)
-   Corvette C4 Forum (https://www.corvetteforums.com/forum/corvette-c4-forum-14/)
-   -   fuel injectors (https://www.corvetteforums.com/forum/corvette-c4-forum-14/fuel-injectors-7834/)

mech259 10-10-2007 06:30 PM
RE: fuel injectors
 
ORIGINAL: Ric

Thanks rshiver I just replaced the fuel pump last week because it only was getting to 35 lbs.
35 lbs is the normal operating pressure for L98's. If it is @ 35, unplug vacuum hose to the pressure regulator and see if pressure rises 3 - 4 lbs. If so, the pump is probably ok.

mech259 10-10-2007 06:33 PM
RE: fuel injectors
 
ORIGINAL: cwb


EDIT: I'm thinkin' here - (see the smoke:D) -
Is the regulator mechanically controlled? Or is it electrical, and it opens up and lets the pressure off when you kill the motor?

That still doesn't explain why you're supposed to bleed off pressure.................................
The pressure is controlled by an engineered compression spring and engine vacuum. The vacuum overcomes the tension of the spring via a diaphragm, hence the regulator leakage. You can test that by just pulling vacuum line from regulator to see if fuel is present.

cwb 10-12-2007 11:12 PM
RE: fuel injectors
 
ORIGINAL: mech259

ORIGINAL: cwb


EDIT: I'm thinkin' here - (see the smoke:D) -
Is the regulator mechanically controlled? Or is it electrical, and it opens up and lets the pressure off when you kill the motor?

That still doesn't explain why you're supposed to bleed off pressure.................................
The pressure is controlled by an engineered compression spring and engine vacuum. The vacuum overcomes the tension of the spring via a diaphragm, hence the regulator leakage. You can test that by just pulling vacuum line from regulator to see if fuel is present.
Gotcha[sm=interesting.gif].

Not'cher first day, huh?


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