Bad Mileage

[TaGsThAsTreetZ]

I have a 1990 singlehammer KA, getting roughly 14 miles per gallon and it SUCKS!!! That is what i get when i drive granny speed. Anyone have ideas what could be the problem? Also i have no check light on so does that rule out my o2 sensor?

 

[KeysSr]

no it dont rule out the o2
it can be
temp sen
o2 sen
tps

 

[Becker-Racing]

you should be happy your gettin that many mpg for such an old car lol

 

[Mr. Steef]

i get way more than that

 

[S13<3]

change the o2, mine went from 14 to 20/21mpg :bigthumbu

 

[TaGsThAsTreetZ]

sweet i just change the o2, car feels much better now, hope that fixes the problem.

 

[wilsonthesphere]

It's always a good idea to do a really intensive tune up buy quality nissan parts if not better.

 

[Dr. Dooms]

Spark plugs, injectors, air filter, clogged cat, o2…

check, change, clean all that and check timing and you will see a difference

 

[S13<3]

Spark plugs, injectors, air filter, clogged cat, o2…

check, change, clean all that and check timing and you will see a difference

dont forget spark plug wires, fuel filter and tank screen! :bigthumbu