ng8264723

They actually did not charge me for the diagnostic time. This is the second place I have taken it too. I checked the motor already last year as did the first place and then Tasca. Not only is the thing spotless all the grounds are fine. It is something else I just do not know what.....
Timing would make it not start but I have cast iron tensioners. It has been more than a year since I put the truck together so my memory is foggy. That said I thought I remember those tensioners having a ratchet mechanism that prevents them from goin all the way down. Therefore jumping timing would be tough

BadFish523

I cant believe no one has suggested the FPDM. Very common culprit of a crank/no start condition. I would check your out as I think this may be your problem. As for coils I'm also in the boat of very rarely do OEM coils go bad. All of my misfires have been corrected by simply replacing the boots and springs. 130k on my OEMs and still running good. Again FPDM.

ng8264723

My build thread was in more detail but I thought that as well. I replaced it as well as the fuel pump. I went with a walbro high volume unit. I added a a new fuel filter and a new FPR. I still did not trust the pressure so I added a mechanical fuel pressure gauge. I am getting 60PSI. I eliminated so many damn variables. I threw the old coils away before I knew better.

Especial86

iTrader: (1)

Well this is certainly news.. what's your frps reporting for fuel RAIL pressure?
Drop a link to your build thread so I can see what other stuff is not original

ng8264723

https://www.f150forum.com/f4/2006-roush-build-315755/


Where are you in MA? Want to come and play one weekend? I am stumped.........I'll buy beer!!!

Especial86

iTrader: (1)

Oh your a m*******!?!
I'm outta Haverhill MA

I'm not trying to brag but I have one hell of a record for pulling a correct diagnosis and repair out of my *** on these trucks..


Hell yeah I'd love to check her out..
Where are you out of in MA?

ng8264723

I live in Oakham Ma. It is near Barre ma, about 30 minutes west of Worcester...

scobar

iTrader: (4)

Flooded?

Also, was this truck ever running with the roush on it?
You tie into the MAF, PCM, and MIRC wiring. Are we sure this wiring is not an issue? The PCM tie in is for ignition switch and MAF moves IAT from MAF to intake manifold.




Two m*******s about 1hr20min from one another As a roush charged truck owner seeing one that doesn't run isn't cool.

Especial86

iTrader: (1)

Seeing any truck with a blower not running correctly or at all drives me nuts! Especially when they are semi local natives. We will definitely meet at some point, especially if the truck still won't fire.

Isn't there a Cmcv workaround via vac line boost bypass routing on these Roush blower kits?
I think I remember figuring this out with another member (cranda) and his Roush setup having low boost issues........ I honestly don't think this is an issue for NG yet, but once he's up and running he'll prob want to ditch the cmcv (imrc) signal regulating a boost pressure solenoid..

I do agree that all that wiring should be accounted for too. But it should still run even if the IAT signal is referenced from the MAF still.
What wire feeds directly from the pcm? An ignition hot wire should not be hard to pull from a few spots.

I think in light of new evidence the TB/TPS would be my #1 repair just to see if this motor will fire up. Since he took the TB apart he might have either screwed up the TPS or installed it wrong when reassembling.
If the truck runs good from that point on I'd disregard the injector codes. But if it runs but runs poorly I'd start looking at the fuel pump setup and probably recommend a jdm tune..

ng8264723

Remember it ran perefect the first time I started it. It did not smell rich at all. Then one day it didn't run. That is the weird part. I don't know how I could of screwed up the TB/TPS to make that happen. It could of failed but I certainly don't think I messed it up. It just doesn't make sense