Weird symptoms into a no start....on boat launch!!

[a_port93]

Ok it is a 97 f350 cclb and when I was hooking up my boat at my friends house the motor took an extra cpl cranks but fired right up.i wish that's where my story ended.i killed it/started it twice to verify it would start...it fired but both times took a little extra.
Something I noticed after this is on my monitor I lost my icp ipr and my monitor tried to reset like it was no longer with that vehicle.it showed egt still but all the others would not read/fluctuate.

Fast forward to boat launch my buddy killed my truck to hear me talk as he was putting the boat in.after this no fire just cranking. I have wts light and tach reads 2-300 while cranking.no smoke and I also checked fuse 22 and replaced it.
I've yet to check hpo reservoir for sufficient oil.my first guess points at high pressure oil system.maybe ipr from reading a few threads but I'm not sure yet.
The truck has stage 1s php tunes t500 and some other goodies.

Any help you have would be very helpful guys I have searched and found a lot of CPs threads and gpr stuff.looks like I'm not getting hay this wknd

 

[Jarrod B]

unplug the icp sensor to see if it starts. if it does, the sensor is just bad.

 

[a_port93]

I did that yesterday at the boat launch...icp sensor is on driver side head correct?

 

[Patrick Feeley]

Yes, that's it. Have you tried removing the chip? Inspect the fuel bowl (especially the IPR wiring). Cheers!

 

[a_port93]

No I'm going to try removing the chip after I get off this damn scraper!!

 

[a_port93]

Ok so I'm getting 320ish icp tops when I crank and when I unplug the icp sensor it shows 2465 as a default I'd imagine and still no start.pulse width is 2.89 and ipr dc is 54%.it has fuel...
I unplugged the chip as well and no difference was made.it seems like the icp stays at 0 for waaaay too long during cranking.it doesn't start rising til maybe 5 seconds of cranking.
Now to check hpo reservoir level after I get the plug rounded off some more dang it!

Any other ideas anyone?

 

[Jarrod B]

when you unplug the icp, it defaults it to what it wants so it starts. 320psi is way too low to fire it up.


your ipr might be sticking open

 

[a_port93]

It doesn't fluctuate off of 54% dc

 

[Andrew]

Ipr nut loose it wiring to it?

 

[a_port93]

Which would leave me to believe that it is not changing position at all from open...?could be a darn good call????

 

[Jarrod B]

its been awhile, but isnt that the max % you can get for dc?



i wonder if you are also getting proper psi on the lop.

 

[a_port93]

New harness going to the ipr as of 4 mos ago.the tin nut is tight thanks for the ideas guys

 

[a_port93]

I take that back with the key in engine not cranking I have 14% dc coming from ipr

 

[Vader's Fury]

Try a little shot of either and see if it starts. Be careful when doing it. You might have a Hpop leak and once rpm jump up the pump puts out enough to keep up with the leak.

 

[a_port93]

I originally thought about a fuel or an oil leak too but the thing is dry as a bone all around the hpop/rails/heads.i know air can get in even when fluid doesn't get out...ill try a shot here in a bit

 

[a_port93]

Any other ideas before I pull the ipr out?

 

[a_port93]

Ok guys the hpop reservoir is full of oil

 

[Jarrod B]

Change out the ipr.

 

[a_port93]

Ok sir you've verified my hunches.thanks guys!

 

[a_port93]

Put in a new ipr started right up then I let it idle for ten minutes and shut it off.now it won't build more than 300psi while cranking
What the heck??