well got a little over 200 miles to the big 20 gallon tank.

looks like my injectors are in need of replacing.... still spews some bluish smoke on any type of startup. Going to check the air pressure, shim the FPR, resist the icp and hope for something better.....

 

Before you start guessing wait and let some guy on here tell you what to do,their pretty sharp.
JIm

 

holy cow! i usually toss in 30$ a week and go like 120 miles. all high way i usually clock 340 miles out of my 16 gallon tank

 

The blue smoke on start up is probably injector orings...

Don't shim the FPR unless you have low fuel pressure and don't put the ICP resistor in until you figure out what your problem is.

How did you measure your fuel consumption? I personally have never filled my tank with 20 gallons. From full to 1/8 tank is about 12-14 gallons of fill up for me and I usually go about 220 miles or so on that.

 

i calculate it the way you should, fill it up, reset the trip mileage.... drive until it gets to a quarter tank. fill it up and calculate.... came up to be 12.5

 

i know o rings are a part of it....but ive read that 266k on a set of injectors can be a little much without service.

 

If the brakes aren't dragging , you may want to test the fuel pressure ..Are you running chip?..

 

i removed my chip and saw no difference..... will test the Fuel pressure soon....

 

Most times the chip will help..

While you are testing , may want to test EOT as it compares to ambient air temp .. If its biased , may be fueling improperly ...

 

EOT?

and with the chip i got 13

 

EOT...Engine Oil Temperature,

What gears do you have?

 

EOT - Engine oil temp ...For our trucks ,it acts like a choke or an enrichment jet ...On fuel injected gas engines , they use intake air temp combined with water temp to decide how much fuel is injected ..Mainly EOT for us ..

 

3.55 LSD for the gears.....

and ok, figured it was a temperature.....im very good with gas engines, diesel is the new thing im working on!

 

You should check your intake plenums for leaks too, they can cause poor fuel economy.....

 

What are your driving habits like? Are you driving loaded or unloaded?