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Old 06-12-2013, 10:26 AM
  #321  
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Originally Posted by fordmotorsport
So why would I have fuel pressure 39 at idle but the wideband is pegged at 17 and it wont even stay running? This crap has me frustrated? I loaded my latest tune and it ran fine, took it out and did my datalog session, did fine, bring it back to the driveway and its pegged and running like crap almost died on me? Any ideas? I just replaced the fuel filter last spring, the pump is brand new and working..stumped
Thats strange. Fuel pressure seems about normal. Perhaps a vacuum leak, maybe there is some unmetered air is getting past the sensors causing the truck to act up. Or, maybe the plugs are fouling up. But based on wideband readings above that shouldn't be the issue...

Ive heard these trucks run like crap if the i/c system is plumbed incorrectly or the pump is off. Might be something worth checking out.

Does the truck do better on cold starts and struggle to run when starting up at operating temperature?

Sorry i can't pinpoint your issue, your pretty far ahead of me. If you have a chance would ya take a video of your vac setup? It would help me tremendously as i have a dyno tune tomorrow. Could also help others troubleshoot your current issues too.
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Old 06-12-2013, 01:31 PM
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Originally Posted by fordmotorsport
So why would I have fuel pressure 39 at idle but the wideband is pegged at 17 and it wont even stay running? This crap has me frustrated? I loaded my latest tune and it ran fine, took it out and did my datalog session, did fine, bring it back to the driveway and its pegged and running like crap almost died on me? Any ideas? I just replaced the fuel filter last spring, the pump is brand new and working..stumped
Look for an air leak after the MAF.
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Old 06-14-2013, 11:28 PM
  #323  
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My cold air doesn't like to stay all the way on. Barely saw it on the bottom side
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Old 06-18-2013, 03:17 PM
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Update: Time to do A WOT datalog session, truck is almost done...I know, I know, videos, let me get it tuned all the way and I will rip some $%#* for you guys
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Old 06-18-2013, 11:28 PM
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Originally Posted by fordmotorsport
Update: Time to do A WOT datalog session, truck is almost done...I know, I know, videos, let me get it tuned all the way and I will rip some $%#* for you guys
Lol bout damn time! I know you are ready to have her rolling.
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Old 06-19-2013, 02:01 AM
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I have been driving her evrywhere and it runs very well, now on to the crazy time rpm's!,..which hopefully won't be that often...damn it yes it will be..love that sound haha
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Old 07-01-2013, 05:01 PM
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Got it all done, I am very sorry but I dont have anyone to take video haha, someday I will try. I have friends coming over saturday so maybe then.

But how does 410hp 520tq sound?
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Old 07-01-2013, 05:07 PM
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Originally Posted by fordmotorsport
Got it all done, I am very sorry but I dont have anyone to take video haha, someday I will try. I have friends coming over saturday so maybe then.

But how does 410hp 520tq sound?
It dyno'd at that?!??
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Old 07-01-2013, 05:22 PM
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Originally Posted by jferg92
It dyno'd at that?!??
No, I asked the tuner for a rough guess. I thought the tq was high, I figured the hp was about right. Obviously this is crank hp..
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Old 07-01-2013, 06:58 PM
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Originally Posted by fordmotorsport

No, I asked the tuner for a rough guess. I thought the tq was high, I figured the hp was about right. Obviously this is crank hp..
That still seems a little high for crank HP, if its just a stock 5.4 with the lightning blower. Cause a lightning is only 350.
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