Question about Cars & Trucks
Have you looked into the injectors, or injector balance? glow plugs just preheat the cylinders before you start turning the engine over. if the injectors are dumping too much fuel it will run rich and blow black smoke, lean it will dump white smoke, same as if it has an internal coolant leak, but smell different. Ford has had problems with EGR systems on some of their diesels, being an older truck how many miles is on it? and the front fuel tank could have a bad fuel pump, pretty common for them to do what you have described. Also might want to have the timing looked at on it! It ignites off of pressure, and if the timing is off it will adversely affect the ignition of the fuel which will make for hard starts, and poor running. there is a lot that needs to be looked at to figure this one out! could be quite a few different things. Good luck!
Posted on Nov 20, 2013
Testimonial: "Thanks, I will look at the injectors. I have already priced some new ones but was wanting someones opinion before I did. Thanks a lot . I will let you know how this works out. The truck has about 150,000 miles on it."
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Posted on Jan 02, 2017
You may want to surf around on some of the powerstroke forums for detailed answers, but I know the powerstrokes use oil pressure to control the injectors so you may have some problems with the high pressure oil pump.
Again, it is just a guess. I just wanted to point you to some of the Ford Powerstroke forums which may be of much more help for you.
Posted on Feb 03, 2009
SOURCE: 91 F150 runs rough at low idle
If you put a scanner on it and you have no misfire codes I would be looking at either an egr valve stuck open a little or a bad Idle Air Control Valve
Posted on Aug 06, 2009
you need to have the engine coolant switch
checked,since the computer relies solely on sensors,the ect tells the computer how cold or hot it is so the
computer will make it a rich or lean mixture to start the engine,if it tells the
computer that it is 75 degrees the computer will lean the mixture like starting
a car in the winter without a choke.
Posted on Jan 06, 2010
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