Maximator
New Member
Hello, Im new to the GM and especially the 6.5TD world but... im studying to become a diesel maintainer so I have some basic diesel engine theory under my belt.
Truck is a 96 K1500 with a 6.5TD. Got about 270K miles on the clock. AFAIK engine is original and so is turbo. I relocated PMD under driver console as per my sig.
Truck will drive fine for 15hrs non stop, there are no serious driveability problems, but its is quite smokey...always been since I bought it last year. I get a DTC come up and then clears itself after a while. Kinda intermittent when it pops up. Havent bought that scanner yet....
Its spews out black and brown smoke when the engine is at a light load, such as not accelerating but just going slowly up a slight hill, rpm is maybe 1300. Then Ill get on the throttle a bit more and big puff of black smoke and I hear the turbo spool up and exhaust is now clear. Then it will upshift, rpms go down and smoke starts again until on top of the hill, or Ive reached speed on a flat road.
Turbo works, no shaft play. WG actuator works too
New air filter (fram paper type), but no change in smoke problem. Had a K&N in there before
Pulled off the vac line and plugged it for the EGR control (I beleive this is what we call it here) as per the pic
Took the truck for a spill and guess what, no more smoke! ...Only when I really stomp on the throttle it gets a bit black but I think thats normal.
So whats the deal with EGR? Do I really need it? I dont have emissions test and the vac line is plugged so I dont let air in the vac system. Seems to be much more of a healthy engine now that the belching brown smoke is gone.
***I just want to make sure that disconnecting the EGR is not just masking an underlying condition that may be causing damage... then again, I havent check the DTC or do I expect anyone here to have a crystal ball.
Any help appreciated
-Max
Truck is a 96 K1500 with a 6.5TD. Got about 270K miles on the clock. AFAIK engine is original and so is turbo. I relocated PMD under driver console as per my sig.
Truck will drive fine for 15hrs non stop, there are no serious driveability problems, but its is quite smokey...always been since I bought it last year. I get a DTC come up and then clears itself after a while. Kinda intermittent when it pops up. Havent bought that scanner yet....
Its spews out black and brown smoke when the engine is at a light load, such as not accelerating but just going slowly up a slight hill, rpm is maybe 1300. Then Ill get on the throttle a bit more and big puff of black smoke and I hear the turbo spool up and exhaust is now clear. Then it will upshift, rpms go down and smoke starts again until on top of the hill, or Ive reached speed on a flat road.
Turbo works, no shaft play. WG actuator works too
New air filter (fram paper type), but no change in smoke problem. Had a K&N in there before
Pulled off the vac line and plugged it for the EGR control (I beleive this is what we call it here) as per the pic
Took the truck for a spill and guess what, no more smoke! ...Only when I really stomp on the throttle it gets a bit black but I think thats normal.
So whats the deal with EGR? Do I really need it? I dont have emissions test and the vac line is plugged so I dont let air in the vac system. Seems to be much more of a healthy engine now that the belching brown smoke is gone.
***I just want to make sure that disconnecting the EGR is not just masking an underlying condition that may be causing damage... then again, I havent check the DTC or do I expect anyone here to have a crystal ball.
Any help appreciated
-Max