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01-22-2012, 09:07 PM
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#1 |
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STOCK STROKE
Join Date: Jul 2009
Location: Weymouth Mass
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No oil pressure above 1700 RPM. 99 7.3L
Question? Just bought this 38,000 mile F350 utility body and I have been banging my head against the wall for too long now, my truck has at least 5 PSI of oil pressure at an idle but as soon as it revs higher than 1700 the gauge drops to zero and the engine starts to break up and smoke, I have replaced the low pressure gerotor pump and still nothing above the 1700 mark. Any ideas????
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 STOCK ENGINE, 5" AUSSIE STACKS TURBO BACK, HOMEMADE FUEL PRESS. GAUGE UNDERHOOD, COBRA CB-IH ANTENNAS, RADAR, PIONEER AVIC 900GBT NAV UNIT, STINGER LIGHT ONBOARD, LARGEST WEATHERGAURD SADDLE MADE, HERCULINER(MYSELF$$), RADIO TIMER W/ WINDOWS, LED LIGHTS OUT THE WAZOO,TURN/TAIL/STOP/WORK/BACKUP ETC. ZOODAD MOD, FOIL DELETE, BRUSHED LOOK.GPR LED MOD, LOW FUEL PRESSURE SWITCH/LED MOD(MY OWN), BACK RACK, 04 MIRRORS(HEAT&LIGHTS). ISSPRO 3 GAUGE (EGT-TRANS-BOOST) PILLAR MOUNT, COOPER 315-75-R16 DISCOVERER STT AUTOLAMP CONVERSION,12K HID'S
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01-22-2012, 10:25 PM
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#2 |
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SDD STAFF/Moderator
Join Date: Apr 2005
Location: Texas
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Cracked oil pickup tube........???
 Tbar |
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01-22-2012, 11:58 PM
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#3 | |
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SDD Senior Member
Join Date: Apr 2005
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Quote:
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2K, F-350, 7.3L, DRW, XLT, XCAB, 3:73s, 6spd... LUK clutch, Adrenaline Hpop, 175/146cc Single Shots w/DP tunes to match, AIS w/Fender sleeve, Zoodad (kinda), Comp/whl, upgraded W/gate actuator, BPRV, EBPV wired as a X-brake, AIH delete, 6.0 Inter-cooler, upgraded I/C Tubes, Full 4" exhst, Aeroturbin, MagnaFlow, Heater core bypass, 203* thermo, Gold coolant w/filter, HPX mod, Raycor 3550 CCV (Mod'd), Premo by-pass oil refiner, 4 gauge "A" pillar pod, FPR shimmed @ 70 psi, 160 amp Alt, Fuel pump inlet QD fitting delete w/Dahl pre pump filter, all Tank & fill hose mods. Frozen Rotor Brake assemblies X4. Viair 20008 OBA, Mag-Hytec Dif cover, Centramatic's, Bilsteins, Ride-Rites, 960cca AGM Batts, all lights LED's. TTMs/C-Beters, Garmin 465T GPS, Door seal Mod,(((XM))), Pull a 32ft Montana 5r, LED'd. Greasable Dexter spring sets. Air Ride Hitch pin box. |
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01-23-2012, 06:31 AM
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#4 | |
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ursus combibo
Join Date: Jun 2006
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Quote:
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John '99 F250 7.3L auto 4wd CC/SB |
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01-23-2012, 05:00 PM
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#5 |
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STOCK STROKE
Join Date: Jul 2009
Location: Weymouth Mass
Posts: 270
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No!
I have already over filled the crankcase by a gallon and a half and I picked the truck up by the pintle with my skidsteer, I could walk under the bumper, it still does it, I also isolated the high pressure side by blocking the cylinder head one by one and running the engine on half a bank to see if it was an ICP leak, just recently I removed the short circuit valve in the top of the block to check the spring, ball and ball seat, all ok, with the ball and spring not installed I get higher rpm before the pressure drops off, I have seen the regulator go in the oil cooler but typically it happens the reverse way, no oil pressure at idle but plenty above 1000rpm, thanks for the help you guys hopefully i can pull my head from my a** and diag this thing.
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STOCK ENGINE, 5" AUSSIE STACKS TURBO BACK, HOMEMADE FUEL PRESS. GAUGE UNDERHOOD, COBRA CB-IH ANTENNAS, RADAR, PIONEER AVIC 900GBT NAV UNIT, STINGER LIGHT ONBOARD, LARGEST WEATHERGAURD SADDLE MADE, HERCULINER(MYSELF$$), RADIO TIMER W/ WINDOWS, LED LIGHTS OUT THE WAZOO,TURN/TAIL/STOP/WORK/BACKUP ETC. ZOODAD MOD, FOIL DELETE, BRUSHED LOOK.GPR LED MOD, LOW FUEL PRESSURE SWITCH/LED MOD(MY OWN), BACK RACK, 04 MIRRORS(HEAT&LIGHTS). ISSPRO 3 GAUGE (EGT-TRANS-BOOST) PILLAR MOUNT, COOPER 315-75-R16 DISCOVERER STT AUTOLAMP CONVERSION,12K HID'S
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| 1700, 7.3L, pressure, RPM. |
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