Had my 7.3 truck towed to Ford last week. They said it needed a new IPR. Had it replaced, also had it diagnosed with two bad injectors. I replaced them. Now I have blue smoke and lugging at start up, and blue smoke at upper RPMs when cool, but once it gets to operating temperature, smoke goes away. We also replaced the four glow plugs on that side. I've replaced the fuel filter and also a new fuel pump, about a month ago. Today, tried ATF in the fuel. When idling, it always has blue smoke. The truck is running great, finally, but just tons of smoke. The exhaust smells very rich, very raw diesel fuel smell. Any suggestions would be greatly appreciated!! Thank you.


1997 Ford F250 Turbo Diesel 4X4; 266,850 miles

 

First off, welcome to FTE! You found the right place. Did you happen to inspect or replace the injector cups when you did the injectors?

 

I just had this recently ,, the connection to the stater needed cleaning .. Since then the truck starts faster & the smoke is gone

 

No, didn't know to check the injector cups. I've heard the ICP could be bad. Maybe my fuel heater could be bad. Just scratching my head as to which way to look next. I've never heard of the injector cups, so I will look into that. Thanks.

 

Just replaced the starter maybe four months ago. I'll check it out, but doesn't explain why it's lugging and smoking at higher RPMs. Thank you.

 

Diamond, have you found out what was happening yet? I am having the same issue and trying to diagnose it.

 

You could try and clean the fuel pressure regulator

 

I think you can rule fuel bowl heater out,when I rebuilt my bowl I found mine laying broken in there and threw it in the corner of garage,caulked conn. shut and see no difference.