no start hot
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Posting Guru
Joined: Apr 2005
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From: duncan oklahoma
no start hot
hello all. got a brain teser for ya.so here it goes.the truck i have in my shop came fron another shop to fix (it wasnt a diesel or general repair facility or steelership). the issue is it wount statr hot.air tested system ,found leakin hpop.fixed that and rechecked.found eals in the top of the injectors falled and the dummy plugs failed.resealed them and rechecked. no air leaks.that im sure of.during the hard start ipr press goes to 375 and stals within 50 psi up and down with ipr commanded to 85%.i do have base oil pressure.i guess ive got blinders on and cant see light at the end of the tunnel.oh yea,the truck came from the other shop after being there for 6 months getting head gaskets redone.and it still over heats in the bay. the owner is in a current law suite with the other repair facility.i know it has a bad oil cooler.have to get this tank going before i get to redo the head repair.thanks for any input.hope all had a great 4th
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Posting Guru
Joined: Apr 2005
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From: duncan oklahoma
update
ok. no takers yet. little update.when hot i can crank on it and dont get enough oil pressure to move my gauge.when the truck starts i have 25 psi at idle and 95 psi at 2500 rpm. i figure that if the lpop was bad my pressure would be lower than what it is when hot.i can idle all day long and the lp oil press never drops below 20 psi. but you kill it and instantly try to restart i cant build any pressure. justa alittle more info to chew on.
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
Well Im thinking little diffrent on the LPO side of it
It should be regulated at 75psi LPO and for some reason I dont think the LPO actual PSI should Matter Hot or Cold (I know what you mean though hot oil less psi)
In my eyes the LPO Regulator should regulate at 75psi LPO
It just seams like the LPO is barly able to keep up
Wonder if a lifter bearing went threw the LPO Pump
Might be worth pullen LPO reg and LPO Pump gears for a Look
maybe the Oil Pickup tube is half plugged with junk
Its had 62 veiws so far LOL
What year we talking here?????
It should be regulated at 75psi LPO and for some reason I dont think the LPO actual PSI should Matter Hot or Cold (I know what you mean though hot oil less psi)
In my eyes the LPO Regulator should regulate at 75psi LPO
It just seams like the LPO is barly able to keep up
Wonder if a lifter bearing went threw the LPO Pump
Might be worth pullen LPO reg and LPO Pump gears for a Look
maybe the Oil Pickup tube is half plugged with junk
Its had 62 veiws so far LOL
What year we talking here?????
Thread Starter
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Posting Guru
Joined: Apr 2005
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From: duncan oklahoma
its a 05. i must admit that i tryed cuting corners,i tapped the eot instead of the eop sensor.figured that they both should give me the same result.guess not. when i tapped the eop port i have 10 psi at 250 rpm when its acting up.the oil pressure reg has been shimmed to in crease oil pressure.the only thing that hasnt been changed is the ipr.i have tested 3(what i thought and still might be good) ipr's.when i graph the ipr press.,icp volt when it starts correctly my ipr and icp volts spike then it starts.when its hot the ipr grad. goes to 300 and rollercoasters to 375 then 300.i might be going the wrong direction.just tired and cant think straight.
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
so you have tried 3 IPR Valves????
And Only thing you havent changed is the ICP sensor???? How about unplugging it I know this trick works if ICP is the culprit
LPO at 10psi is way way LOW
you kinda Lost me LOL
Maybe its Time for a budweiser
And Only thing you havent changed is the ICP sensor???? How about unplugging it I know this trick works if ICP is the culprit
LPO at 10psi is way way LOW
you kinda Lost me LOL
Maybe its Time for a budweiser
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
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Lead Driver
Joined: Mar 2010
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From: Woodbridge, Ontario, CA
Is it just me, but I totally didn't understand any of what was posted? So are we low on ICP psi or low pressure oil? What is your ICP actual versus ICP desired and IPR duty indicating when the truck does actually run? I'm pretty sure I speak English well enough that most of you guys who know me, understand me pretty well.
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Posting Guru
Joined: Apr 2005
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From: duncan oklahoma
man ive been in the same trinch as you.have all the certifications that ford required.i havnt charged anything to the customer .im not a idiot.just got one bitting my a##.if you havnt had one do it to you yet then you havnt done enough or been in it enough.dont judge me man.you dont even know me.
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Posting Guru
Joined: Apr 2005
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From: duncan oklahoma
i spent 21 years in the dealership world.i left because i would go to give a repair request to the service adviser to get with the customer that would be 400$,he would always say that the car/or truck needed 5 times that .a car that a old lady would drive 4 times a week dosnt need a complete front end repair or a tranny overhaul when it only has 15k on the odometer.there are a lot of good dealer tech on her that i appreciate and arnt throwing any stones.just like someone calling me a shade tree mechanic.dont hurt my fealing cause i know that im not.and the steerership thing goes to the place they work not the individual techs that work there.they take pride in there work.i just wish the dealership would do the same for them and show there appreciation to them more often.
Thread Starter
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Posting Guru
Joined: Apr 2005
Posts: 1,035
Likes: 2
From: duncan oklahoma
Is it just me, but I totally didn't understand any of what was posted? So are we low on ICP psi or low pressure oil? What is your ICP actual versus ICP desired and IPR duty indicating when the truck does actually run? I'm pretty sure I speak English well enough that most of you guys who know me, understand me pretty well.
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
if you have resealed every thing and are sure you have no leaks its time for a block off test. if that passes then run the motor on 4 cyclinders at a time to narrow down to bank. if still nothing look for low volume from pump
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