Did the HPOP test again

SkySki Jason

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Just thought I'd share what I found.

It has been awhile (40k miles??), so after reading the recent HPO threads I figured I'd see what I still had... (60-90+mph @WOT monitoring ICP and IPR DC on Scangauge II)

Previously, this truck (Excursion) would hit 2800psi+ and bleed down to about 2400psi and stay below 40% DC in my hot tunes. Now, its maxing out at 2400psi and bleeds down to 1900psi and creeps up to nearly 60% DC!!! :shocked:

This truck has 260k miles and until recently was 100% stock/original except for tunes and AIS intake (and veggie stuff).
 

golfer

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with that number of miles on original injectors...I would venture that the injs are bypassing oil around the poppet valves...
 

SkySki Jason

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with that number of miles on original injectors...I would venture that the injs are bypassing oil around the poppet valves...

Yeah, I'm thinking I better put some 250/200's in there before one of those old injectors fail! :pimp: Sounds like those work well with a GTX4294...

Btw, it runs better than ever with these tunes, turbo and exhaust!! Without gauges/monitoring - I would not suspect there was an issue or 'potential' issue. :doh:
 

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