6.5L - lots of black smoke during acceleration
#1
6.5L - lots of black smoke during acceleration
HI,
I have a 1999 6.5L with about 300K miles that puts out a lot of black smoke when I accelerate. I think it's something with the wastegate or EGR but looking for help to diagnose.
I got code P0236 (Turbocharger Boost Sensor A Circuit Range/Performance.) I replaced the Wastegate solenoid and cleaned the inside of EGR valve as best I could and the codes went away, but not the black smoke. I get the correct vacuum from the pump (the needle is steady at 25 in-Hg) and about 14/15 in the wastegate line, the needle fluctuates. Should it fluctuate? With the solenoid removed, should I be able to blow through it?
The wastegate actuator arm moves when the engine is off and is pulled up when the engine is idling. Is there more I can check? Is it possible to take the wastegate apart?
Previous Issues/History:
-When I bought the truck, it showed code P1653, would idle fine but rev up to redline if I tapped the gas pedal. I replaced the PMD and the run-away RPMs went away after 10 or 20 restarts.
-The injector pump was replaced by a previous owner. (I have the old pump if anyone wants it) Could the issue be injector timing?
-Could black smoke be leaking injectors?
Thanks for reading.
I have a 1999 6.5L with about 300K miles that puts out a lot of black smoke when I accelerate. I think it's something with the wastegate or EGR but looking for help to diagnose.
I got code P0236 (Turbocharger Boost Sensor A Circuit Range/Performance.) I replaced the Wastegate solenoid and cleaned the inside of EGR valve as best I could and the codes went away, but not the black smoke. I get the correct vacuum from the pump (the needle is steady at 25 in-Hg) and about 14/15 in the wastegate line, the needle fluctuates. Should it fluctuate? With the solenoid removed, should I be able to blow through it?
The wastegate actuator arm moves when the engine is off and is pulled up when the engine is idling. Is there more I can check? Is it possible to take the wastegate apart?
Previous Issues/History:
-When I bought the truck, it showed code P1653, would idle fine but rev up to redline if I tapped the gas pedal. I replaced the PMD and the run-away RPMs went away after 10 or 20 restarts.
-The injector pump was replaced by a previous owner. (I have the old pump if anyone wants it) Could the issue be injector timing?
-Could black smoke be leaking injectors?
Thanks for reading.
Thread
Thread Starter
Forum
Replies
Last Post
UC Kid
Chevy/GMC Truck and Duramax Turbo Diesel Forum
1
10-20-2014 10:06 AM