After the HPOP replacement and what I thought was air causing it to run very badly, it completely smoothed out, for 2 days. Now it's rumping worse than before and I can barely get it to move from a stop. Surging and bucking really bad again while driving. I'm almost afraid to drive it.
Help please...

 

Have you checked the UVC harness? You probably did, but just a thought.

 

Jim, time to go back to shop and tell them it is their fault and make them fix it, no if ands or buts.

 

I talked to them today and told them what was going on. They want me to bring it in tomorrow and let them run a diagnostic on it. They seem to think it's my IPR, but it was working just fine before. I asked about the new CPS being bad and about the talk of the grey CPS causing the #8 injector to read bad on the CCT, but they said that they had not heard of this. Could the CPS be causing this? Just seems kind of strange that the IPR would go away at the same time.

 

When they installed the new HPOP did they not install a new IPR? If they did not, and want you to pay for it, tell them they already got your money but your truck does not run as promised,so your lawyer will be contacting them.

 

Get the diagnostic run first. Get the codes from them and we'll go from there. Did the guy guess IPR over the phone immediately or have to look some things up and call you back? If he guessed that right off then you're either dealing with a mechanic familair with the PSD, or the IPR didn't go back in the HPOP correctly the first time.

Let us know what you find out.

 

I like the lawyer thing.Give them something to think about.

 

The tech that I'm dealing with is the best PSD tech that this Ford dealer has. After the HPOP and CPS change, he ran the diagnostics and didn't get any codes. It was running bad at idle so he pulled the ICP plug and it died. He told me that it shouldn't do that and that he thought that the IPR might be going away. Then he ran the CCT and found that the #8 injector is showing bad. I did't see by how much but I read that the new grey CPS sometimes is causing the #8 injector to fail the CCT somehow. He told me to drive it for a week and let him know how it was doing. Well it cleared up after about 200 miles for 2 days, now it is running worse than it was. It's so bad that it will hardly move from a stop with the pedal pressed to the floor. I pulled out of a parking lot today and once it got into a lane it wouldn't move. I sat there with the pedal mashed to the floor but it sat there for about 20 seconds before it deceided to move, right before the semi was about to run into me. If I have to replace the IPR, then fine I'll do it. But I don't want to dump money into it to try to fix it. I want to know for sure what the problem is so I can fix it the first...well I guess it's the second time. It is starting the rump, rump right as it is started now. The idle surges from about 400rpm to about 1500rpm at any given time. If I'm sitting at a light and I'm not hard on the brake pedal, the surge pushes the truck foward. I almost ran into the back of the car in front of me. I don't want to drive it anymore. It's getting too dangerous. I've even run the scan with my snap-on scanner too, no codes except for a PO476 I think it was. The dirty tube to the exhaust manifold. But that shouldn't make it run like this.
This really sucks. I feel that I shouldn't have taken it in for that recall in the first place. It was running great before, just had an oil leak. Now it barely runs...go figure.