hpop leakdown - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 05-25-2010, 04:16 AM Thread Starter
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hpop leakdown

ok so Ive replaced injector orings hp oil line seals what else could cause my hpop leak down

99 psd 123000mi supechips programmer 4" magnaflow exausht.
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post #2 of 5 (permalink) Old 05-25-2010, 06:16 AM
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IPR?

{95 F250 Powerstroke XLT} 5 spd, Wildman 6 pos. chip, custom IC, ADs, AFE stage 2 intake, 3" down pipe to custom 5in stack. EBPV break, shimed FPR, idm mod by mattymx, CCV mod, Leveling Kit, diprocol egt and boost guages.
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post #3 of 5 (permalink) Old 06-02-2010, 06:49 PM
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The HPOP can't really leak down.

What problem or symptoms are you seeing?

'93 F-250 HD, 7.3L IDI, 5spd - FARM TRUCK
I Support: Trailer brakes an every axle over the towing vehicle's GVW; CDLs for RVers; Safety inspections for ALL vehicles and 6 axle trucks (97K GVW proposal).

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post #4 of 5 (permalink) Old 06-02-2010, 07:23 PM Thread Starter
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lopey idle at start up after sitting for 4 or more hours lack of power when first starting no acelleration until the oil pressure comes up is what it feels like the system has to bleed out the air

99 psd 123000mi supechips programmer 4" magnaflow exausht.
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post #5 of 5 (permalink) Old 06-02-2010, 08:29 PM
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Lopey idle and lack of throttle response COLD only are possibally related to the HPOP reservoir leaking down but more often than not that will present as long crank-to-start and not a lope.

Your symptoms are consistant with injector armature wear, extended oil change intevals (maybe previous owner etc), or overly thick oil for the operating temps. Given the temperatures in most of the country, I fail to see how it could be the wrong oil. That leaves us with a sticking IPR valve, biased ICP sensor, wrong oil or injector wear.

Without looking at the ECM data stream while the problem is occuring, it's a crap shoot. But, I would replacethe ICP sensor just for fun and change the oil using a KNOWN good quality 15W-40 diesel oil (API CF or later).

'93 F-250 HD, 7.3L IDI, 5spd - FARM TRUCK
I Support: Trailer brakes an every axle over the towing vehicle's GVW; CDLs for RVers; Safety inspections for ALL vehicles and 6 axle trucks (97K GVW proposal).

Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote - Benjamin Franklin

I vote for LIBERTY!
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