Ford 7.3L Does Start after Sitting - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 07-28-2012, 10:43 AM Thread Starter Rookie
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Ford 7.3L Does Start after Sitting

I have a 94 For F350 dually that is very dificult to start after sitting. Unfortunately I have my camper on it, and seldom take it off so it does end up sitting for weeks on end.

I'm a newbie diesel owner, and had it towed once because I couldn't get it started. The shop told me it uses oil pressure to build fuel pressure and if it cranks long enough it will empty the oil reservoir, or the oil reservoir is empty to begin with, it won't start.

I don't think filling the reservoir on top of the motor is normal, and even thn it can be tough to start. It seems I have to pump the "gas" pedal beforehand as well to get it to start.

Is this normal? How can I start it easier? How often does someone need to start the engine to prevent this situation?
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post #2 of 3 Old 08-04-2012, 08:21 PM
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If your hpop res is leaking down then you have a anti drain valve issue

Mike 1997 F250 totaled 11/19/12
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post #3 of 3 Old 08-06-2012, 11:06 AM
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Let it sit and remove the check/fill port on top of the front cover BEFORE starting it. Is there oil in the HPOP (High Pressure Oil Pump) sump? If yes then you have a LPOP (Low Pressure Oil Pump) supply issue and the LPOP isn't keeping up with demand at cranking. If there is no oil in the sump then like stated above you have a anti-drain back valve issue.

Oh, and

-Bean's: 160/100 (FF Injectors), 2/ 6-POS chips (TW & Beans tunes), Overboost controller, E-Fuel
-BANKs: downpipe, full exhaust, gauges, intercooler
-Irate: T-4 kit, IC pipes, 3" Irate Plenums, BASB Turbo
-Stage II trans.
-Mag-Hytec trans. and pumpkin covers
-6637, CCV, IDM, 6.0 Fan, 49-Federal PCM swap, MAP line Mod
-370 Amp alt., 40k trans cooler, ADRENALINE PUMP
-twin on-board air w/ 10 gal. tank

-Oh, and a 2015 F350 6.7L DRW 4x4

Re-pinning '97 Cali PCM to Federal
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7.3 diesel , starting problems

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