poor milage 86 2.8l

[kanga19]

HELP!!!!!
I have a 1986 s-10 4x4 with a 2.8l automatic trans
my fuel milage bites big time. currently @ 16.76 miles to the gallon
need some ideas as to what is should be and what may cause such poor milage

[geoffinbc]

Hmm. First change the fuel filter and do a tune up. Make sure base timing is at 10* BTDC. Check out the tire pressure and be sure the brakes are not dragging.

[kanga19]

timing is set at 10* btdc and i installed a new fuel filter when i put the new engine 6000km ago. the brakes arn't sticking already tought of that. also i am only getting 8* total advance when you go from idle to full throttle.

[geoffinbc]

Ignition module is probabally toast. Or you have a knock sensor circuit problem.

[kanga19]

where on the engine is the knock sensor located
i can't find it for the life of me.

[geoffinbc]

It is on the back side (nearest the firewall) it is screwed into the water jacket. It could possibly be on the front of the car depending on the model.

[johnc]

Doesn't an 02 sensor failure cause a full rich condition? Do a search online for the 02 sensor operation explanation

[akira]

almost 17 mpg doesn't sound far from normal for city driving, or maybe I am just used to shit fuel milage. It's an under powered engine pushing a 4 spd auto AND a transfer case! It not a Golf TDI. Are you getting that all of the time even on the highway? Do you still have a cat and an egr pump? Axe those and you will notice a difference

[bvr775]

17mpg is good for a 2.8 4x4 in a 1st gen s-10.your asking a 90hp engine to move close to 3400 lbs.3600 lbs if you have the stiffened full ladder frame that came with some of the 4x4 packages.
Do u have stock size rims and tires? have you done anygear changes.