We have replaced the idm icp under valve cover harness glow plug relay cps cleaned the regulator new fuel filter it has no blown fuses and fuel pressure is around 55 psi it runs perfect for about 5 to 10 seconds then just shuts off like turning a key i don't know what else to do

 

Before throwing all those parts at it (or since, for that matter), what have you TESTED?

 

IPR sticking? How's the oil level in the hpop?

 

And how is the oil level on the dipstick?

 

This is a good question!

 

you replaced the CPS but how bout going back and looking at the connector really good. I hope u used a motorcraft cps and not cheap one.

I remember reading sometime back that if the ecm does not sense CPS run signal in several seconds, that it will cut off. I think it would run 10 seconds or so.

 

I didn't think it would ever start or run without a constant signal from the CPS. Maybe I was wrong.

 

No, I think you're right.

 

How long does it crank to get it started again? Check oil on crankcase as well as HPOP...wait, that's already been said.

 

It must not be too big an issue since he has not been back. U are correct, it does need CPS signal to crank. I was thinking possible noise once running in signal. I also see hpop reservoir route as being viable.

The reason i suggested it was I had read it and also experienced at a show recently. Truck would crank good, run for less than 15 seconds and quit. It would do it over and over. The cap had been leaking that covers hpop gear nut. It had oiled the cps connector pretty good. We cleaned it really good with brake clean it started running fine.

 

sorry about not getting back sooner i use the computer at work and we are closed on weekends i have checked the hpop before i replaced the sensors i called our local ford mechanic and he walked me through checking it properly the cps was a motorcraft the ipr has been replaced as well oil is in the safe mark on the dipstick it still fires rite up for 5 to10 seconds and dies as it runs for that period of time it is a perfect smooth idol and has no check engine light

 

Does it start right back up or do you need to wait awhile?

 

Check your IPR pigtail for chaffing or corrosion. Look down inside the back of the pigtail and make sure the wires aren't touching. Ask me how I know this LOL

 

i checked the ipr yesterday pig tail and wires are good and as soon as it dies it will start rite up like normal then die again

 

if you replaced ICP, you might have introduced air in system


That can take time to get out


Double check your oil level


Try starting up and running at 1k RPM and see if it will hold at that RPM


ohm out the harness for injectors since you were in there from the IDM connector