Hello everybody.

It has been a while since I have posted. Figures, I live for this site and the only time I really open up is when my rig is acting up…

If you look at my previous post’s you will see I had my FICM replaced via the dealership. Lucky for me I know an individual who happens to “overlook” my “kitty” missing.

New issues… Well let’s start. About a month ago she started to buck on me at a stop. RPM’s jumping 200+ almost pushing me around. Giving it fuel always stopped this. When “semi” cold, 15 min of warm time and getting going, she will start to buck on the highway, keeping in mind “very slow” acceleration. I tried to track the idea of anything to do with the boost. However its very random. I have been all over this site, as well as many others… I know I am sorry boy’s google takes me where it wants too.
I through countless hours of research have concluded that it is my ICP. The problem is I don't know where the He%% its located on a 2005. I know its on my pass cover. The issue is I don't know where exactly. Lets explain in semi detail. Got under the hood in mid daylight “***”uming that I had the time to located and diag the issue. Judging by the signs that many have had previous to myself I figured I had it. I pulled the plug to what I thought was my ICP (could be the icp”) Lets say 5” from the front of the pass side cover. Plug removed under light… did I mention I started the diag mid day? Its dark and using a light its “glossed” inside not the oil I prayed to located. What I did notice is this. 3 purple wires running to a plug that I removed to located what I think to be my ICP. The plug itself is melted like it is heating up in a short at the connection. No significant oil…. WTF is going on. I have all the signs to a ICP failure. HELP ME PLEASE… Maybe I am after the wrong sensor? Or I have unplugged the wrong one? I will tell you I started ther truck just fine without that sensor plugged in...Against her will at 10:30pm with me revving her up.

Please guide me.
Sean

 

Keep in mind I started it no problem with that sensor unplugged. It has 3 purple wire's going to it. I may have the wrong sensor. It looks like a ICP. However I am not a PSD Tech. So who the F knows.

 

Its the ICP. Ford makes the connector to splice into the harness.When it is unplugged the computer still lets the truck run in a sort of limp mode.

 

How so? I don't want to sound "out of it" however I am. Splice what? the purple wires?

That you for you're respond.

Sean

 

Yes the part has the 3 purple wires and plug that needs to be spliced into the harness.Pay attention to which wire goes where on the plug.

 

Thank You for making sense of that mess.

 

Here's an update to this puzzle. I decided that I would unplug the ICP and drive it like normal on the way home from work knowing that the computer would go into limp mode a default the values. At first this seemed to solve the issue but that was in my head. What's going on is around 1750-2000 rpm's on the highway at normal cruising speeds you can really feel the "bucking" it starts to shake the truck around and almost acts like its starving for fuel or a failed injector. I know that with the icp unplugged it will be in most cases be hungry for more fuel, however its with plugged in and without.
I read elsewhere that it could be my egr, I cleaned the egr 2 oil changes ago, but i decided it was worth a shot and unplugged the egr with the icp plugged in again. Same problem. Its acting like it has nothing under the hood. Under powered. The chugging at lights now becoming more frequent, and the bucking while driving. Where should I look? No CEL light, nothing.

Thank you,
Sean

 

Mine did the same thang and finally HPOP went out and left me stranded. when mine started it buck real bad then it would clear up after I got the RPMS up then would run fine until that one day when she just died. after a while I got it to run againe for it to start bucking againe then just died then called the rollback to shop it went. $2800.00 later runs like brand new

 

Bustaduck,

Thank you for the reply. As far as giving it some more fuel and getting the RPM's up, same here I get it past that mark above 2000 RPM's it does seem to smoth back out, but again its just not 100%, no smoke out the pipe or from the rear tires

From the sounds of what you discribed ive got the exact same issue. So my problem is a failing HPOP, did you say that your ICP went as well and later the HPOP or just the pump itself?
I sure could use a beer now. I was hoping it was something less serious and less $.
Thanks again.
S

 

You could run a oil pressure test on it to determine a failing HPOP. Maybe just going to throw this out there the IPR valve?
12 psi at 700 rpm, 24 psi at 1,200 rpm, and 45 psi at 1,800 rpm at operating temp.
If you do find your HPOP is bad you can replace it yourself alot cheaper than 2,800. I just bought mine today 600.00 from ford.

 

Ford tech here,
Your ICP controls Injector control pressure it works with the IPR to regulate High pressure Oil to your injectors. without your Icp plugged in it will undubtably cause intence bucking. more then what you had originally. as for your egr valve, don't unplug it.
i would recommend repairing the icp plug in with a ford part connector. then after that if it is still doing it. remove your egr valve with the engine off key off DO NOT CRANK or turn key on this will cause a code to appear. im surprised you haven't had a code set from all the pulgs unpluged. inspect inside the Intake from the hole where the egr valve was. excessive carbon may be a problem. this could be a stuck turbo charger depending on where the carbon is coming from. sounds like it from the way you have a lack of power situation. please do not attempt repairs if you dont know what your doing this can cause shop repairs to be even higher because the tech doesn't know what you did and he will charge you labor time for the hassle.

 

The HPOP was not that bad as far as price but the labor is what got me @ $75 per hour. The tech. had to take the hole top of motor off to get to it . Yes I could of maybe don't it my self. but realy didn't have the know how. So thats why I let the tech. do it . It looked to be a tough job. but you know I really didn't have the money but I'm riding now. I hope thats not your troubles but if it is I feel your pain. Thats why those beers taste sooo goood

 

Alright well heres an update. I went to ford yesterday after driving around all morning trying to find a cheaper Harness and ICP sensor. Something about paying retail at Ford never feels right to me. While the parts guys was getting my parts looked up on the computer I asked him if its common for the ICP to fail when theres no oil leaking. I explained to him what was going on just as I have here and he talked me out of paying $250 for the ICP and the harness for it! Talked me into a $7 bottle of Motocraft fuel lubricant. He was thinking I was describing a dry injector or two. Looked to me like it was a Ford version of Diesel Klein but i gave it a shot.
Spent the afternoon doing an oil change and looking the truck over. Per his recommendations i ran the fuel down to a quarter of a tank to add the lube to the tank. I decided being under the hood anyway I would add some directly to the 2nd fuel filter and the rest to the tank. Along with that I added almost half a bottle of Diesel Klein. She didnt like that fuel lube at first while starting it back up but it fired right up, got it good and hot and beat it up on the highway. For the most part its seems that the troubles have vanished, When i say for the most part its still a little under powered and bucking a little. I will burn the rest of the tank and drive it like I stole it. I will let you all know what happens next.

Thank you everybody for the help and advice.