please help

[slow00si]

I made another thread a couple days ago and havent gotten much help so straycat told me to post it in here and i dont really want to rewrite everything so here is the link, i need to figure this out asap because i have to let it run about 20 minutes before its even driveable and it gets about 11mpg normal driving, so if you have any info please help me out and i would greatly appreciate it

http://www.powerstroke.org/forum/7-3...-terrible.html

[Logan]

Marc or Jon or Scott or DJ or any other techs, I think this one is for yall

[Turbodude]

I posted this on your other thread by accident so ill post it back here. This is what it sounds like to me:


as much as i hate to say it, it might be the ECM...if the injectors are failing then not that sounds to me like the Injector Driver Module (IDM)...WIth you putting those voltages up and asking about the map signal...that is not right it shouldn't even be more than 5 psi at wide open throttle with tranny in neutral(no load). These things are telling me that something is not communicating properly..obviously...if the ecm is sending commands to the engine based off of stuff its making up (default settings)then of course your engine is going to run rough. I know it sounds dumb but have you tried to see if those sensors are plugged in. I know that the IAT intake air temp will cause a no cold start. I just seems odd that the dash light isn't on...almost like the ECM is storing old codes and operating off them. I say the ECM and/or the IDM are bad.

[DirtyDiesel]

just a guide i bought my IDM rebuilt and upgraded for 100 and sent them my core. i got it at beansdieselperformance.com. along with my injectors they were cheaper than the dealership too. just so you know my dad had a tire come apart on his truck and it tripped the fuel pump circuit breaker and we did not even know that there was a circuit breaker. so we put our scanner on it and it threw a bunch of codes not even related to the fuel pump. just sayin could be a simple problem that is throwin alot of codes.

[slow00si]

Yea i checked all the connections and everything is plugged in but if you need anymore data info let me know and ill jot everything down monday morning at work and post it.
But i would really like to figure it out before i go spending money to fix nothing. and the p0605 code which is internal ctrl module rom error is that a ecm or idm code?

[Turbodude]

Hey buddy got some answers for you. I looked it up in my shops service manual. P0605 internal control module Rom failure...well it is cause by an internal failure in your PCM..or some like to call it ECM...not your IDM...the trouble shooting guide says clear the codes...and drive it...if the code comes back it is the PCM aka ECM. So it sounds like your PCM/ECM is toast. Hopefully thats the problem and hopefully it fixes it.

[Turbodude]

hey before you go replacing ecms though check your fuses...it could be as simple as a blown fuse. The ECM has a fuse and if its blown...i don't know how...but the engine might still run but act up.

[DirtyDiesel]

NAPA sells the PCM(ECM) and they are only like 150 bux orso. i had to buy one for my truck. make sure you know your calibration code before you go and buy one they have to have it. and the PCM is sunk into the firewall on the drivers side. not real hard to get out either.

[slow00si]

Originally Posted by DirtyDiesel

NAPA sells the PCM(ECM) and they are only like 150 bux orso. i had to buy one for my truck. make sure you know your calibration code before you go and buy one they have to have it. and the PCM is sunk into the firewall on the drivers side. not real hard to get out either.

ive cleared the code before and it came back so i guess its a ecm then, and how do i figure out the calibration code? but ill check all the fuses before i order one.

[slow00si]

It had 2 blown fuses in the engine bay but after i replaced them it has no change, and which one is the ecm because there are 2 modules down there next to each other is it the one closest to the motor or closest to the fender?

And our napa doesnt carry ecm's for my truck i allready checked our napa online catalog from our shop they have ecms for the 5.4 and the v10 but nothing for the 7.3. so i guess im going to have to price it from ford since we get discounts on stuff from them too.