fuel filter?

[airdeano]

is that -16% idle and -20% cruise? suggests that the computer is constantly
removing xx% fuel to maintain its stioch. (rich)
or is that +16% idle and +16% cruise? suggests that the computer is
constantly add xx% fuel to maintain its stioch. (lean)
there is a big difference.
if you are having the +xx% yes increase the pressure to 60psi (by your gauge)
and referify your fuel trims... if they increase then your on the right track.
a -4% to -2% is desirable.
if you are having the -xx% yes decrease the pressure to 50psi (by your gauge)
and referify your fuel trims... if they decrease then your on the right track.

3psi is a 5% increase which should better your trims (5%)... a tamper-resistant T-5
bit is needed to adjust your pressure regulator.

airdeano

[kdog]

I am positive 16 and 20. which is lean.

As it turns out my regulator is part number GM 10299146 which is an inline fuel filter regulator for a 1999 - 2003 vette.

Is this thing adjustable at all and if so how do I adjust it? airdeano, you mentioned a T -5 bit used for this purpose. Could you give me more data as to how I go about doing this? Am I just drilling a larger hole somewhere?

Am I using the right regulator for my application? I would like to bump up to 60psi some how.

What psi were the vettes running at through those years? (I tried asking the dealer parts guy and a service guy about psi on this part and they did not know)

I know that the 2004 and up 6.0's had everything in the tank and my tank was not deep enough to accommodate the stock part so we went with the vette unit. It has two fuel lines going into it from the tank side and one our to the engine and a ground wire but no other electricals. In fact I still have the unit.

I really appreciate all the help. It'll be nice not having the engine sound like a lawn mower let alone the extra heat from the exhaust since the computer is overcompensating and running rich.

[kdog]

So...No instructions on getting the psi up on this unit?

Sorry I am getting anxious.

[kdog]

Please I am begging!