I posted this question over at PN but haven't got any help. 97 F250 with E-Fuel, Full Force 160 inj, Tymar intake, PowerHungry TS chip. With the stock HPOP I was logging an IPR % of 65 and ICP of 1800 during wot. New CNC Fab HPOP and I still read IPR % 65 and ICP 2200. For some reason it's either not building pressure or commanding too much duty cycle. Truck does have a lazy idle and occasionally it will droop to 500 then come right back. Idle readings are IPR % 14 and ICP about 600 when hot. 3/4 throttle and 20 pounds of boost IPR is 32% and ICP is 2800.
New HPOP but Same Results
- Thread starter Diabolic
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gnxtc2
Active member
gnxtc2
Active member
What happens if you change to a different tune? I think your issue is tune related.
Are the tunes custom or canned?
Billy T.
[email protected]
Are the tunes custom or canned?
Billy T.
[email protected]
Or he has a huge hpo leak. The modded pump is producing more overall pressure and arguably volume but its going somewhere. Either diagnose the head that is leaking by isolating them one at a time or just pull the injrctors and see which oring is trashed.
No oil leaking that I can see. Truck runs flawless except at wot. The injectors are new. I can try other tunes but my damn obd2 port keeps losing connection at every bump. I'm addressing that first. So a bad ICP or IPR won't cause any of these issues?
m j
Active member
some like he has canned tunes for stock injectors. so probably a 5ms that a stockish pump is not going to feed
I would like to add that the truck throws no codes, starts up on cold mornings with just a puff of smoke then settles to a 650 RPM idle. It has no day drive ability issues at all. Smokes like crazy on the race tune and cuts out at boost over 30 psi. When coming to a complete stop the idle will drop to 550 for just a split second then back to 650.
Vader's Fury
Active member
Any hot start issues??
dillpurdy92
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Following.
1994.5 CCLB zf5
1994.5 CCLB zf5
gnxtc2
Active member
m j
Active member
the map only reads to 35psi. you need a boost fooler regulator to prevent the map from seeing excessive boost.
http://store.norgren.com/us/en/deta...thout-gauge-5-to-50-psi-outlet-pressure-range
you need tunes that match your injectors. you have oil hungry injectors and a stock HPOP (despite the BS the seller has claimed it is 100% stock)
Are you saying my CNC pump is just a stock pump? Have you had a bad experience with them? I don't see why this is so difficult to get such a mild build working well. Full Force is a reputable shop. I bought the matching chip from them. Why would they sell me tunes that would not compliment their injectors?
As said, there is a leak in the HPO system. I had stock ACs in the OBS with a terminator modded pump and had no trouble getting 3000 command with TDP (Wildman) files.
Short of running a rail pressure check with a handpump, I would suggest to disable the injectors, pull the valve covers and crank the motor while watching the injectors. Look for oil bubbling up around the base and/or coming from the oil spouts. If the top oil ring or the poppets are leaking, you'll know it.
Short of running a rail pressure check with a handpump, I would suggest to disable the injectors, pull the valve covers and crank the motor while watching the injectors. Look for oil bubbling up around the base and/or coming from the oil spouts. If the top oil ring or the poppets are leaking, you'll know it.
