Hi all, I recently finished my project truck; however, I am having some issues getting it to stay running. It has a hard time starting and when it does start The truck will fire and die unless I keep my foot into it at about 1500 rpms and then it will run for 60 seconds or so. After it dies it wont start unless it sits for a minute or two and i cycle the key. Here's what's been done. Rosewood diesel 160/80 injectors, adrenaline hpop, t4 mount with s366 turbo and intercooler, Hydrachip with tony wildman tunes. And irate diesel full electric fuel system . The tach moves while cranking and I have smoke coming from the exhaust. Fuel pressure at the regulator is at 65psi while cranking. hpo res is full Icp is 53% while cranking and injection pressure is 3445psi.

 

IPR DC at 53 % ? May just have air in the system yet. The 53 % is what is called for .

 

Been cranking for hours now. charged the batteries twice and keep the chargers on during cranking. I'm having a hard time trying to believe there is still air in the system. what should I see ICP at? I thought that 3400psi seemed high?

 

I agree, 3400psi seems wrong?

 

3400 is a lie . You will never see that cranking . The ICP sensor is biased . Try unplugging it .The fuel system has air , so does the oil . When it runs let it idle till you can give it fuel

 

It is a brand new ford icp but I'll give it a shot unplugging it. Could a stuck IPR cause those numbers?

 

The IPR number is what the PCM is calling for . Yes , the IPR could be sticking . THe PCM commands the IPR based on what it sees from the ICP sensor mainly. It uses TPS input as well . 3400 would be WOT . . You are using the go pedal may be why the ICP is high . We normally start the engine at idle .

 

Well i just did some more diag, and found the IPR not moving at all. Put 12 volts and no movement or sound coming from the IPR. Will pick up a new ford one tomorrow and let you all know how it goes

 

Go to Riffraff to get one, Ford will bend you over for one.

 

With the key on there is 12v to the IPR continually . The PCM sends ground to it as needed in a pulse . .

 

Thanks that's good to know for future use. I could not get the IPR coil to do anything on the bench so I picked up a new ford IPR today hooked up my scanner and cranked the truck for maybe 10-15 seconds icp went to 825 and truck fired right up! I let it run for maybe 10-15 minutes before the rain came and had to call it a day. One thing I thought was interesting that the old coil was measuring 10.8 ohms same as the new one but I couldn't get it to energize. Can't wait to wrap up the last few things and drive this truck with the bigger sticks in