alanduke
09-18-2005, 13:31
I have a 94- 1/2 ton Silverado 6.5 Turbo. Have replaced pmd with ss diesel heat sync with #9 resistor. Was having stalls after 1yr. and 12k miles and replaced pmd again. Additionally, replaced oil pres. sensor, lift pump, waste gate vacuum censor switch. I am experiencing a heavy black smoke on heavy acceleration and when cruising on hiway there is a "flat spot" on acceleration, like a quiver/hesitation with a puff of black smoke. Not getting very good mileage. Could this be caused by a faulty sensor that measures fuel/air or something like that?
I have noticed that the lift pump is not always running when I shut the engine off. Is this normal and if not could it cause the smoke problem?
Any ideas on the smoke and rough running is appreciated.
Alan
I have noticed that the lift pump is not always running when I shut the engine off. Is this normal and if not could it cause the smoke problem?
Any ideas on the smoke and rough running is appreciated.
Alan