well i think my pump is going south what you guys think

[tatertot]

Ok guys it is a 03 at idle I see 590 on the icp and 30 on the ipr through the scangauge. Today on the way home went to pass a semi and no power so I took a look at the scan gauge and it read 850 to 900 on the icp and 78 on the IPR. Also only builds pressure to 1500 can't get it to go over that. So i'm thinking I either blew a oring or its the pump. Any ideas on what fittings I need to get to put air to the icp and oil rail. Any help appreciated. Also low side oil pressure is good no fluctuating on the dummy gauge but i'll check that also this weekend. Also no hard starts when its cold or hot thats what has me puzzled. Just happens when I go past 3/4 throttle.

[06Lariat_]

When's the last time the fuel filters were done?

[tatertot]

Fuel pressure never drops below 59 when hard on the throttle

[tatertot]

Usually sits around 62 when driving

[06Lariat_]

Sounds like you could have a bad injector or two... Maybe hpo problem

[tatertot]

Thats what i was thinking no injector codes when I hooked up the reader. i'll try to do some data logging towmorrow

[twoicebergs]

Before I say your ICP is off, you need to go back to stock and check your ICP and IPR. As you should have read, most tunes skew the ICP used by the PCM for fueling calculations, which gives a higher IPR that raises the true ICP giving you more fuel.

Your no power issue may in fact be a leak or a weak pump. It could also be a bad injector. Sometimes a weak passing moment is due to a floor-mat under the pedal. The AP is really vulnerable to a mat preventing full travel!

[tatertot]

Just got done doing that put it back to stock let it warm up with a drive to the store. Shut it off there for 20 minutes came back out starts up fine. On the way home 3/4 throttle again same thing icp dipped down to 850 and ipr 78 let off the gas and coasted icp went up to 1200 then down to 700. Ipr went back to 30 again fuel pressure dipped to 59 psi

[tatertot]

Well its offical High pressure oil leak got home tonite with the truck turned it off and no start icp was showing 332 and ipr 75.8 guess it time to tear it down and order some more o-rings. Anybuddy know the size of the icp threads need to pickup another air adapter kids cleaned the garage on we while I was deployed.

[twoicebergs]

M12-1.5mm

Same as the fuel port and a bunch of other plugs.