I have always gotten bad mileage (10-13) on the road driving 65-75. was wondering if I got another ECU from a salvage yard and tried it would it have a different memory or something that may give me better mileage?

my pickup is a 02 CC shortbox 235/85/16 tires, tonneau cover, other wise all stock. it has about 25-30K on new injectors and injector pump, the hole in cooler tube was fixed at the same time. It gets oil changed(synthetic) every 7500 along with fuel filter.


Thanks is advance MIke

Wow 10-13 is pretty bad for an LB7 maybe u should try a chip?

I had a Edge juice with attitude ran it in about every setting no improvements. What a good chip for the lb7? also forgot to mention I have about 204,000 miles never had a fith wheel in it. any help would be great. thanks MIke

Man, I get that kind of mileage pulling my 30ft 5th wheel camper. There is something wrong somewhere!

have you ever corrected speedo/odo for tires.

What rpm are you running at that speed? If you can get us the rpm and speed we can tell if its off.

Is your MAF bad? if its reading -40*(as low as it'll read if i remember right) then its dumping massive fual in the engine and your running super rich. Does it smoke if you bog it down?

Wow 10-13 is pretty bad for an LB7 maybe u should try a chip?

It would probably be best to address the intital problem prior to "chippng" it, otherwise he's just covering up the real problem.

If I remember right it runs about 2000 rpm at 70-72 it doesn't smoke at all. MAF I put a new one in and it is the same

Moved to LB7.

Has the ecm had the latest calibration update programmed to it.

I don't know for sure it has been recalibrated or not will that make a difference