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post #1 of 9 Old 04-30-2013, 10:12 AM Thread Starter
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LPOP issue? Oil?

Okay so for awhile now once my trucks oil temp gets above 175 if I turn the truck off it won't come back on till the oil temp is around 165. When it does come back on its a LONG painful crank and kind of stutters into running. Also the oil gauge on the dash doesn't come up till about 2/3s of the way through the crank. My research has led me to LPOP but I'm not certain. I thought the oil could be the problem because for winter I changed my oil to 5w40 synthetic and possibly once it's warm it could be too thin? Help me out please
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post #2 of 9 Old 04-30-2013, 05:53 PM
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What brand filter do you have? Do you have oem filter cap? The spring in the lpop which allows only a certain amount of pressure may be worn or clogged with crabby oil. Make sure filter is oem first


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post #3 of 9 Old 04-30-2013, 05:54 PM
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It could also be a hpo leak as well if your having a long hot start


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2003 Silver 6.0L PSD CC/SB FX4
EGR Delete, Oil Cooler upgrade
Blue Spring & Banjo Bolt Upgrade
AFE Stage II Intake, MBRP Straight 4" Turbo back
RBP 6" tip
SCT Custom Tuned
Autometer GS series
BFG A/T 285s
Recon Smoked Cab Lights
Recon Interior L.E.D.
Recon 3rd Brake L.E.D.
Custom Fiberglass Center Console
Two 10" Sundown Sa4's, Hifonics 1200 RMS mono
Optima Batteries
Meyers 7.5C Plow
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post #4 of 9 Old 04-30-2013, 06:43 PM Thread Starter
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Quote:
Originally Posted by ps_lane01 View Post
What brand filter do you have? Do you have oem filter cap? The spring in the lpop which allows only a certain amount of pressure may be worn or clogged with crabby oil. Make sure filter is oem first


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the filter is OEM replaced less than 5000 miles ago when i put the 5w40 in. cap is OEM as well
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post #5 of 9 Old 04-30-2013, 06:45 PM Thread Starter
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Quote:
Originally Posted by ps_lane01 View Post
It could also be a hpo leak as well if your having a long hot start


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oh gosh I hope not. i thought it wasn't HPOP because it never dies while driving or anything like that. maybe im wrong?
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post #6 of 9 Old 04-30-2013, 07:17 PM
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Well if your lpop is having trouble feeding the correct pressure and volume to the hpop resovoir it may starve the hpop- thus feeding air into the system giving it a long start. If its having trouble starting when its warm then 9/10 times its hpo system related. Its hard to say without some real numbers. If you have a scanner bring up icp desired, icp actual, ipr duty cycle, ficm voltage before during and after cranking. We can get a better chance of diagnosing with some real numbers ya know?


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2003 Silver 6.0L PSD CC/SB FX4
EGR Delete, Oil Cooler upgrade
Blue Spring & Banjo Bolt Upgrade
AFE Stage II Intake, MBRP Straight 4" Turbo back
RBP 6" tip
SCT Custom Tuned
Autometer GS series
BFG A/T 285s
Recon Smoked Cab Lights
Recon Interior L.E.D.
Recon 3rd Brake L.E.D.
Custom Fiberglass Center Console
Two 10" Sundown Sa4's, Hifonics 1200 RMS mono
Optima Batteries
Meyers 7.5C Plow
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post #7 of 9 Old 04-30-2013, 07:20 PM
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Quote:
Originally Posted by Powerstokin View Post
oh gosh I hope not. i thought it wasn't HPOP because it never dies while driving or anything like that. maybe im wrong?
When u shut your truck off with hot oil and a hpo leak, that leak is much easier to find air in the system because the oil is thinner. How come your seeing a maximum of 175 degrees oil temp? Should be around 185 -200 at normal operating. Whats your ect like?


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2003 Silver 6.0L PSD CC/SB FX4
EGR Delete, Oil Cooler upgrade
Blue Spring & Banjo Bolt Upgrade
AFE Stage II Intake, MBRP Straight 4" Turbo back
RBP 6" tip
SCT Custom Tuned
Autometer GS series
BFG A/T 285s
Recon Smoked Cab Lights
Recon Interior L.E.D.
Recon 3rd Brake L.E.D.
Custom Fiberglass Center Console
Two 10" Sundown Sa4's, Hifonics 1200 RMS mono
Optima Batteries
Meyers 7.5C Plow
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post #8 of 9 Old 05-01-2013, 09:16 AM Thread Starter
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Quote:
Originally Posted by ps_lane01 View Post
When u shut your truck off with hot oil and a hpo leak, that leak is much easier to find air in the system because the oil is thinner. How come your seeing a maximum of 175 degrees oil temp? Should be around 185 -200 at normal operating. Whats your ect like?


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It's not maximum 175 I'm just saying when it's above that it won't come on
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post #9 of 9 Old 05-01-2013, 09:17 AM Thread Starter
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Quote:
Originally Posted by ps_lane01 View Post
Well if your lpop is having trouble feeding the correct pressure and volume to the hpop resovoir it may starve the hpop- thus feeding air into the system giving it a long start. If its having trouble starting when its warm then 9/10 times its hpo system related. Its hard to say without some real numbers. If you have a scanner bring up icp desired, icp actual, ipr duty cycle, ficm voltage before during and after cranking. We can get a better chance of diagnosing with some real numbers ya know?


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I have a scanguage ill try to get those numbers
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