olddesertrat
Registered User
Hello People:
Here is story. Bought a 1985 F350 with 6.9L and Banks 1st generation turbo charger few years ago. Also has t-18 Borg Warner manual 4-speed and 4.10 gears. Believe ran around 2500 rpm at 65 mph.
On driving from Texas to Las Vegas, NV got average of 18 mpg on highway, which I expected. Continued to get around 18 mpg on highway for around a year, then started getting alot of exhaust smoke.
Got a deal on completely rebuild injection pump so bought it and installed. Did punch scribe mark so knew where to set new injector pump timing.
New pump timing mark would not allign with mark on casing. The injection pump mark is about 1/8th inch low.
Good: 1. Truck runs great. 2. Passes smog.
Bad: Get only 11 mpg. Now run 3000 rpm at 65 mph.
Thinking of couple things could be wrong.
1. New injection pump with old injectors....maybe too much fuel getting pushed through old injectors.
2. Timing is wrong...even tho truck runs fine, can not allign marks with new pump
3. Fuel setting on new injection pump way too high.
4. Maybe wrong injection pump for my truck?
Bad mpg is costing me a lot of money. Please let me know what I need to do to get back my 18mpg or higher. Also would like suggestions for best injectors for my truck.
Later
Here is story. Bought a 1985 F350 with 6.9L and Banks 1st generation turbo charger few years ago. Also has t-18 Borg Warner manual 4-speed and 4.10 gears. Believe ran around 2500 rpm at 65 mph.
On driving from Texas to Las Vegas, NV got average of 18 mpg on highway, which I expected. Continued to get around 18 mpg on highway for around a year, then started getting alot of exhaust smoke.
Got a deal on completely rebuild injection pump so bought it and installed. Did punch scribe mark so knew where to set new injector pump timing.
New pump timing mark would not allign with mark on casing. The injection pump mark is about 1/8th inch low.
Good: 1. Truck runs great. 2. Passes smog.
Bad: Get only 11 mpg. Now run 3000 rpm at 65 mph.
Thinking of couple things could be wrong.
1. New injection pump with old injectors....maybe too much fuel getting pushed through old injectors.
2. Timing is wrong...even tho truck runs fine, can not allign marks with new pump
3. Fuel setting on new injection pump way too high.
4. Maybe wrong injection pump for my truck?
Bad mpg is costing me a lot of money. Please let me know what I need to do to get back my 18mpg or higher. Also would like suggestions for best injectors for my truck.
Later