Long cranking before start. Ideas..
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Long cranking before start. Ideas..
1997, f250, 7.3. Low miles..78k.
long crank at startup cold has gotten worse...several years now, started a long crank 4ish sec . I would cycle the wts a couple times and would start quicker, blowing blueish smoke.. bigger cloud as time went on but doing so kept cranking reasonable..when warm was good. Now, doesn't do beans if I cycle wts. No smoke at all now. Long..and i do mean its like 9-10 sec at least and longer..crank to get started.
ohm'd out glow plugs, all fall into .5 to .6 range(tested through connectors at cover so assume inside wiring good). Gpr power passing through and stayin powered 1-2 min. Gas in tge bowl, filter looks good, no debris in bottom. Cps is new version.
psi off the shrader valve at fpr bouncing 52-58psi.
buzz tested injectors, no codes for anything. Checked pcm connection and pins. Unplugged icp, no change in length of time to start.
ran scan with forscan, dunno exactly what I'm looking for but reading icp and ipr once started. Icp was like 12-13 and ipr was like 4800kph? I wanna say...didn't seem like numbers moved till it started...
im down to IPR being the issue...its original...
thoughts or ideas, tests?
help....
long crank at startup cold has gotten worse...several years now, started a long crank 4ish sec . I would cycle the wts a couple times and would start quicker, blowing blueish smoke.. bigger cloud as time went on but doing so kept cranking reasonable..when warm was good. Now, doesn't do beans if I cycle wts. No smoke at all now. Long..and i do mean its like 9-10 sec at least and longer..crank to get started.
ohm'd out glow plugs, all fall into .5 to .6 range(tested through connectors at cover so assume inside wiring good). Gpr power passing through and stayin powered 1-2 min. Gas in tge bowl, filter looks good, no debris in bottom. Cps is new version.
psi off the shrader valve at fpr bouncing 52-58psi.
buzz tested injectors, no codes for anything. Checked pcm connection and pins. Unplugged icp, no change in length of time to start.
ran scan with forscan, dunno exactly what I'm looking for but reading icp and ipr once started. Icp was like 12-13 and ipr was like 4800kph? I wanna say...didn't seem like numbers moved till it started...
im down to IPR being the issue...its original...
thoughts or ideas, tests?
help....
Last edited by sirenalx; Today at 12:36 AM.
Lead Driver
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From: Bahstun
Check fuel bowl level after 8 hours, low level could mean going back to tank
Check HPOP level as well, No oil will take to fill
How fast is your starter turning? too slow it wont fire
Front main seal leaking? It can suck in air and cause hard starts
Check HPOP level as well, No oil will take to fill
How fast is your starter turning? too slow it wont fire
Front main seal leaking? It can suck in air and cause hard starts
i ain't rite
Joined: Mar 2005
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From: Marlboro Mental Hospital.
another thing to test, PLUG THE BLOCK HEATER IN. leave it plugged in for at least 2 hours before trying to start. if it fires rite up, it is a glow plug issue. if it still acts the same, it is electronic issue.
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front main leak? Have no oil dripping on ground, but front of motor is a little oily/dirty...
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Nevermind, found post describing locatiob, will look and plug in in a bit.
Last edited by sirenalx; Today at 12:04 PM.
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