Something weird happened today..
 

Well it didn't take me long to come back and post something up....

Well this morning truck started up GREAT, ran great, no problems, got to work let it idle for a minute or 2 and shut it off...

Well 9 hours later I went to start it up, crank,crank,crank, nothing.

First things first, checked fuel in secondary filter good, injector buzz good.

Cranked and cranked some more and nothing....

then I checked all fuses jiggled some relays around, batteries were just about dead, cranked it over again and bam started up like a champ..

Now, I doubt there could still be air in the system, but what could have stopped if from starting after running great when I went to start it back up?

hmmm....

trash in the ipr

I wish I could tell you. Mine occassionally takes spells where it cranks and cranks and refuses to start without leaving any kind of code. Stop, let it sit for 10 seconds, and it fires like a gasser. Very very strange.

You could still have air working through the HPO system, but check the simple things....FICM plugs, etc and check it for codes.

Injector pressure regulator?

Thats underneath the turbo correct?

Maybe a oil change might help?

Also, I added sea foam to the oil on Sunday.

Yes, I did check for codes, and for some reason my SCT wont read codes until I try it 3 or 4 times.

I check everything I could without getting pissed for it not wanting to start.

I also did think air in the hpo system

Oil change won't help. You need to pull it and check for trash on the screen.

Yes, underneath the turbo.

Also check your ICP connector. Is it wet? Take it off and replug it snug.

Icp sensor..right pass side valve cover towered the front of it?

But it was raining out on my way to work and it just stopped when I went to start my truck.

Taking the turbo out again does not sounds good to me.

You don't have to remove the turbo, you just need a special socket.

Oh really? That sounds much better.

What kind of socket like an o2 sensor type of socket?

What size? Wouldnt hurt to take it out and clean it right?

Not for an 06. Just unplug it and see if it starts.

Well the truck started, and ran good again.

Where exactly is the icp sensor?

Yes, exactly but this socket has a cut up the side because the connector is at a right angle. Not sure of the size since I did mine while the turbo was out--LOL--and I used a big ass crescent wrench.

Well taking the turbo out is a breeze now, I don't don't like lining the up pipe back up.

I would like to do this tomorrow. Anyone know that size?

And if its gummed up it should be noticeable? What should I clean it with?

I used a 36mm hub socket and cut a slot out of it with a cutting wheel. It sucked to trash a $30 socket but I have it for later I guess.

This is off subject, but you pain 30 bucks for a 36mm socket!! I bought one at advanced auto parts for 12 bucks, i use it for the fuel filter and oil filter caps

So would a 36mm wrench work?

Ill see how it starts tomorrow morning.

I plugged it in, it's still getting pretty cold at nights here. 25deg

25* isnt that cold, It should fire right up at 25*! I had to plug mine in at 25* to get it too start, but my FICM was bad! I am curious as too why you are cranking long at times, as my truck cranks long too! I have to crank mine for 3 or so seconds, let up, than crank again. It usually starts with in 3seconds on the 2nd starter cycle! Wonder if my IPR sensor is going?

PS I have been following all your threads, and you got way more patiance(?) than I do! I hope your on the downhill side now!:-X22

I got a 1/2" drive 36mm Craftsman socket for $6 in 2004. Probably a little more than that now.

IPR would be the suspect, not the ICP.

Sorry their are so many ipr, icp, ficm, ect, egt, eot, koeo, koer, and tcm codes,:-tap i get mixed up! I edited it and fixed it! Thank you!

Well I have a 36mm socket for my filters.

Will that work? I don't want to have to cut a slot in it.

Might just go buy a wrench tomorrow just to be Safe.

So I just take it out clean it up a litte bit and all should be well and I can rule that out?

Well.......ICP IS a sensor--injection control pressure sensor

IPR is really an electrically controlled relief valve--Injection Pressure Regulator. If the IPR sticks or defaults (trash or no electricity) open all the HPO is dumped to sump and a no start condition results.

Yes, I'm still dealing with all the nomenclature. I thought I was uptown when I got my 93 chevy in 99 and had to worry about EPROM's and knock sensors. I'm used to carb floats, points and condensors, and "TWIST IT LEFT FOR A LITTLE MORE TIME" as go fast parts. :-missingt

Would bad IPR cause a rough idle after cold start?

See how it starts in the morning first. It may never give you another minutes trouble. A wrench won't work without removing the turbo....you need a socket with a slot because of the electrical connector on the IPR.

Well.......ICP IS a sensor--injection control pressure sensor
IPR is really an electrically controlled relief valve--Injection Pressure Regulator

Damn It! Your killin me here! LOL Back on subject! lol

Haha :-X22

Probably not. that's likely to be injector stiction.

Is the downhill side a good thing or a bad thing? Lol

Downhill side is good!

when i replaced my injectors in my truck it took forever to start. it finally started and i test drove it. went great! pulled it back in the shop and killed it. went out about 5 hours later and same thing took forever to start. bet there is still air in the system. if not that then go for the ipr.

Yeah man, I just can't win.

I'll see how it goes tomorrow, going to work and leaving. If I don't have any problems I might just leave it alone.

Not that it matters but Yeah!!! I spent around $30 on a 36mm Craftsman, 1/2" drive, 6 point, deep well, impact socket (on sale a couple years back). Looks like it's a $59.99 socket today.

I guess if I wanted to drive 90 miles round trip into town and back to grab some crap tools from advance I could have, but the one I had was readily available

The special IPR valve socket tool ranges from $67 to $148 on the internet.

Mine isn't an impact socket. Just a 6 point deep well (probably made in China). Freakin impact stuff is serious $$$.

I knew that IPR socket was expensive. That's why I'd just assume pull the turbo--LOL.

remove the ipr, inspect the screen, if you find a hole in the screen replace the vlave if the screen is full of trash replace the screen and reinstall then retest.
the reason the ipr gets messes up is install errors on the oil cooler. it happens no matter how carefull you are.

Ill see how it starts this morning, I am keeping my fingers crossed.

I will remove the turbo to take it out and clean it.

Ill keep you posted.

Well it cranked and cranked and nothing.

So I'm checking this now, I honestly hope this is what it is.

Took the turbo out in less then 20min but now I have to wait for the auto parts store to open to go get the 36mm wrench and possibly a new ipr valve.

This is what it looked like
http://i298.photobucket.com/albums/m...1300795714.jpg

Screen is not torn, not even dirty...IMHO.

Any ideas now?

Before I go in and reinstall my turbo anyone think it could be my HPOP?

How hard is it to replace it?

Would this cause my issue?

HPOP is right below it.

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