AdrianD
Member
Hello everyone!
This weekend I followed my Jeep in another Jeep and noticed some black smoke when accelerating at low revs (under 2000 rpms), so today I changed the air filter and saw some improvement but there still is some smoke at low revs, especially if accelerating harder before the transmission downshifts. It seems like once the engine speed is above 2000 or the load is constant, the smoke clears up.
I've checked the turbo actuator and it's not sticking but I can't test if the actuator responds to vacuum as intended.
The intake manifold is probably gunked up by EGR and oil vapors, could that have any effect?
What about the MAF? Could a faulty MAF cause overfueling?
My EGR is electrically disabled, I can take if apart to check for leaks.
Fuel consumption on my recent 3000 mile trip was my best ever: 34.13MPG on one 400 mile stretch of high-way, 31.65 with some headwind and passing semis, similar 400 mile section and 33.17 coming back on the same section. The rest of the trip included driving in rural France and Germany and the usual traffic jams around Paris but the total average was 29 MPG
This weekend I followed my Jeep in another Jeep and noticed some black smoke when accelerating at low revs (under 2000 rpms), so today I changed the air filter and saw some improvement but there still is some smoke at low revs, especially if accelerating harder before the transmission downshifts. It seems like once the engine speed is above 2000 or the load is constant, the smoke clears up.
I've checked the turbo actuator and it's not sticking but I can't test if the actuator responds to vacuum as intended.
The intake manifold is probably gunked up by EGR and oil vapors, could that have any effect?
What about the MAF? Could a faulty MAF cause overfueling?
My EGR is electrically disabled, I can take if apart to check for leaks.
Fuel consumption on my recent 3000 mile trip was my best ever: 34.13MPG on one 400 mile stretch of high-way, 31.65 with some headwind and passing semis, similar 400 mile section and 33.17 coming back on the same section. The rest of the trip included driving in rural France and Germany and the usual traffic jams around Paris but the total average was 29 MPG