Last night I replaced my fuel return tube in my secondary fuel filter housing and then started the truck and let it run up to operating temperature. Everything was find so I shut the truck off. This morning my brother shows up were getting ready to take my truck to go do some work and I start it. Fires up right away it runs for 10 seconds and dies I plugged in the AE and its showing the ICP is jumping all over the place from 350-1900 I am going to try unplugging it and see what happens. My ficm volts are 47.5 and IPR is 84% It sounds like it might be the ICP or Pigtail what doyou guys think

 

FICM volts dropped to 40 with koeo dropping down to 44 while cranking on it. I think its time to talk to ed at FICMrepair?
Still concerned about the ICP Value

 

Battery voltage is dropping to 9.5 volts durring cranking They are bran new batteries Maybe 1 or both are bad Charger is on them now.

 

I agree with you about the FICM needing repair. I'm a little sketchy about the IPR% at start up.

 

I am going to change the pigtail on the ICP real quick I have a spare one. I just dont understand why its jumping around so much so quick I mean it goes from 300 to 2k and all around in between in a split second back and forth. What do you think?

 

I have read that the IPR should be at 84% while cranking. Has this changed? If it has, what would the reading be?

https://www.ford-trucks.com/forums/1...ml#post9749564

https://www.ford-trucks.com/forums/1...ml#post9749523

 

Maybe so......I didn't remember and mine starts before the SGII can ever read it. I don't doubt that it should be.

 

I really don't subscribe to coincidences if it was fine before you messed with the fuel return and after it is acting up, I tend to think it is something you did. What was wrong with the fuel return line.

 

I don't think injector control pressure is your issue personally, but that's only my opinion. Take it for what it's worth. I would say your IPR duty cycle climbing to 84.77% while cranking the engine over has more to do with the fact that you just had your engine apart for major surgery not too long ago. And you haven't driven it too much since. With 300 climbing to 2K readings, that should be plenty for your truck to start. This is unless your ICP is not reading correctly, which should be very easily verified by disconnecting it, and attempting to start the engine. Your FICM voltage issue seems to be the cause, if the information you're posting is correct. Do your injectors precycle (buzz) when you KEY-ON?

 

ICP unpluged default value of about 1900 ICP IPR 52% when ICP is unplugged still no start. It tries tofire sometimes. I think its FICM or Batteries. Dropping down to 9v while cranking does not seem good. Should I let the batteries charge fully and then test them before I send my FICM to ed or should I just send it in and get it gone through?

 

Now that you mention it M-Chan I dident notice the buzz when I turnthe key on.
Raptor My fuel return tube was broken off insidethe secondary filter

 

LOL SEAN I was going to get ahold of you to meet up with you tomorrow too Looks like it will have to wait again

 

Dropping as low as 9 volts when cranking the engine over tells me your batteries are on the weak side of things, which could just have been caused by numerous crankings of the engine. Any lower than that, the engine will not fire up because the PCM will just shut down and reset.

 

What part is that? The little white part?

 

This, along with your FICM voltage readings tells me your FICM is the culprit.