Can any one help me out with advise on the following situation with my 2007 f350. About 2 weeks ago my truck started smoking really bad, and I took it in to have it diagnosed. It was 4 injectors that were bad, so I had them replace all 8 and also install a bullet proof oil cooler. From the moment I got the truck back, it did not seem to idle as well as it used to, and over the next week, it began to blow a good amount of white smoke and run very rough. But the weird thing is when I took it back to the shop to have it diagnosed, the minute I pulled into their driveway, it ran perfect, and they were unable to pull up anything. The next morning, I started my truck for work and as I drove down the street, the truck ran extremely rough, and seemed to be running in 2 cylinders. I shut the truck down, restarted it and it ran a little better, as I limped it back to the shop. I am waiting on their answer. Any ideas?

 

Did they give you any information on the status of the FICM at any point during the repair? Or did they say anything about batteries, alternator, or fuel pressure? Why was the oil cooler replaced, and what was done to the EGR cooler at that time?

Run this test and let us know what the results are:
https://www.ford-trucks.com/forums/8...procedure.html

EDIT: You probably can't run that test if the shop has the truck. So call them and ask them specifically about FICM voltage. What kind of shop is it in?

 

It is at a diesel mechanic shop. I actually replaced one of the alternators because it was bad. I forgot to mention that. I figured it could have something to do with power supply to the FCIM. Also the oil cooler was replaced because they told me the old one had run its coarse and was on its way out. The egr cooler was replaced a year ago, and I routinely clean the valve. Also I replaced the fuel filters as well. Could the voltage loss to the FICM for a period of time cause the computer to go bad?. My battery light came on for about 30 seconds after every start for about a year. Thanks for the help.

 

Yes, a dead/dying alternator or weak batteries is bad news on a 6.0L because low voltage can burn out components in the FICM, which can in turn start killing injectors. A battery light is really bad news, voltage low enough to trigger that for any length of time is almost certainly going to cause problems.

 

Thanks for the help, is this something that is fairly easily diagnosed?

 

Yeah it's easy, all it takes it a voltmeter or a scantool that can pick up or be programmed for Ford PIDs. The procedure is in the link in my first post.

 

Hello, update on my truck. They installed 8 brand new Bosch injectors in the truck, after supposedly talking to Bosch and finding out that there was a possibility that the batch of injectors that they used the first time were bad. Started the truck, ran great and as they test drove it, it got progressively worse and they limped it back into the shop. He told me they are getting no codes, and that the FICM code was not coming up, and that they checked it and it was receiving the proper voltage. Do you have any ideas? I'm really not quite sure what to do at this point. Thanks