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Old 05-04-2013, 01:12 PM
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Another 6.0 cranks but won't fire

Drove truck earlier, almost didn't start but finally did. Got it home and now won't start. Changed fuel filters yesterday. Check both filters good, FICM voltage is constant 47 V, ICP V is .3 sitting and cranking. Unplugged ICP and fired up and died instantly. Batt voltage is good. Any suggestions?
Grrrrr....
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Old 05-04-2013, 01:30 PM
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have you done the STC fiiting, stand pipes and dummy plugs? Does it start fine when the truck is cold?
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Old 05-05-2013, 10:49 AM
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No I haven't done Any of that. And I tried again this morning, no luck.
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Old 05-11-2013, 08:18 AM
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Truck started 5-6 times today even drove it to town twice, only started while on batt. charger, I bought 2 new batt. and still won't start.
ICP climbed when truck started, but won't again.

Anyone know whether batt. voltage can affect HPOP?
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Old 05-11-2013, 08:33 AM
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Voltage will not affect hpop but will affect FICM and therefore injector fireing.

You need to look at live data while cranking with a scanner and then run the tests.
Read the sticky thread.
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Old 05-11-2013, 08:49 AM
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Whats ICP psi, needs over 500psi to start, should been around 700ish when cranking IIRC.
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Old 05-11-2013, 10:15 AM
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Quote:
Originally Posted by dannyboy950 View Post
Voltage will not affect hpop but will affect FICM and therefore injector fireing.

You need to look at live data while cranking with a scanner and then run the tests.
Read the sticky thread.
FICM remains at 47 V at KO and cranking.
IPR is 14% at KOEOff & 84.7% cranking.
ICP fluctuates. When it started it jumped up, when it doesn't start it is between 100 - 350.
Sounds like HPOP from what I have read on here but what would make it start and then not start off and on like that?

Which sticky thread??
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Old 05-14-2013, 04:39 AM
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stc

Quote:
Originally Posted by fordhorseplay View Post
Drove truck earlier, almost didn't start but finally did. Got it home and now won't start. Changed fuel filters yesterday. Check both filters good, FICM voltage is constant 47 V, ICP V is .3 sitting and cranking. Unplugged ICP and fired up and died instantly. Batt voltage is good. Any suggestions?
Grrrrr....
this is a clinical sign and symptoms of an STC oring gone bad. its a 5 hour fix if your slow, because thats how long it took me. replace your STC with the new version as well as your turbo down-pipe/up-pipe. your looking at about $150 if you do it yourself.
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Old 05-14-2013, 07:29 AM
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Sounds like it could be number of suspect components in the HPOP system. This is a point where you say "How far should I go?"

Doing the STC fitting and putting it back together could work, but you won't know until you get in there. So what do you do when you open it up and the fitting is fine? One might suggest having a slew of "just in case" parts so you don't have to wait to have something delivered. It might be a good idea to have the updated STC fitting, stand pipes, dummy plugs, updated turbo oil drain tube on hand so you avoid having your truck down for an extended period of time AND you can repair stuff in there before they fail and leave you somewhere. What about the oil cooler or IPR?? Do you change those while you're in there????
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Old 05-14-2013, 08:33 AM
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Angry New issue

Today I noticed a buzzing sound coming from the truck, all the start up lights on the dash were lit up, with key OFF. Then tried cranking and it fired right up. Problem now is it won't shut off! Turned key off and removed from ign. and it kept running, had to pull fuel pump fuse to kill it. So now I'm thinking I have a electrical problem instead of a oil problem. Not sure. Truck has a alarm that hasn't worked when I bought it.

Anyone with ideas? Or where to get a schematic for the harnesses for it?
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