Help Please! STC Fitting Question

[regans5]

OK so I'm tearing into my engine to do the following: Clean Turbo, Clean intake manifold, Delete EGR, Replace Oil Cooler, Hope to find and fix an oil leak I've had for a long time on the backside of engine. I removed the turbo yesterday and did not find any oil leaks. My main question is I've read on an eBay ad for an STC fitting kit that it was for mid 04 thru 07. I have an 04 with an Aug '03 build date. Am I affected by the plagued STC problem and should I replace it while in there or is my engine not prone to that? I've also watched vids on youtube where they said the STC fitting can rub holes in the HPOP housing. Could this be my oil leak? Thanks in advance.

[regans5]

Any other suggestions are greatly appreciated.

[amdriven2liv]

Nope, you don't have the STC issue on yours.

[Dave]

Your truck doesnt have the STC issues.

[sinner6.0L]

Your oil leak may be the ICP sensor, that's common for an 03 engine

[regans5]

That's good news about the STC. So I don't need to take apart the HPOP unless I find an oil leak ???

Your oil leak may be the ICP sensor, that's common for an 03 engine

That would be nice because I also have had a P2265 code for a long time which has something to do with ICP. I also just recently purchased an EDGE Insight CTS and notice that the ICP voltage ranges from approx .7 up to around 3V depending on engine RPM which I suspect is normal but it randomly and frequently all of a sudden drops to zero for a few seconds then returns but the engine runs fine. Does this sound like a bad ICP sensor or possibly a bad wire harness or connection? Thanks to all.

[dannyboy950]

Yes it could be a bad ICP sensor or harness the 03-04 years were bad for that.

You useually changed the sensor and harrness pigtail together, especially if it was leaking oil at the sensor plug, it would saturate the pigtail.

[sinner6.0L]

.7-.8 volts cranking is what is required to fire the engine. Idling should be around 1v.

It should never dip to 0v, that is definitely an indication something is wrong with the sensor or related wiring.

[regans5]

Great! Gonna remove the intake manifold, egr cooler, and oil cooler on Sunday and when I can access the ICP sensor I'll take it out and inspect it. That would be great if that was my oil leak. Thanks again for responses and I'll let you know what I find. Oh and also just by researching things on here, I was gonna install a blue fuel pressure spring. Any other parts I should consider replacing while I'm in there?

[regans5]

Ok, Got the intake manifold off & my ICP sensor out from the topside & sure enough it was leaking and the pigtail was oiled. Thanks for all your help guys.