my little ranger only gets 13mpg wtf? it has the fuel injected 2.9 in it tied to the auto tranny.at 65mph its only spinning 2200rpm,its 2wheel drive this thing should be pulling 16mpg imo. it has new plugs wires cap roter and i cleaned the egr valve and sea foamed it,no improvement what so ever.any ideas

 

have you checkd the air filter and fuel filter

 

I average 23 mpg wth warmer weather, once the under 30 temps hit in the morning I average around 20.

Definately check the air filter. Probably replace the fuel filter.

I would inspect the convertor as well.

Beyond that, it would seem the engine isn't going into closed loop.

Suspect:
ECT
O2 Sensor

Josh

 

yep and yep,i bought the thing to save money with but instead im wasting it haha.so im still driving my dodge with the cummins,because atleast i get 20mpg with that

 

whats the ect?

 

The temp switch for the ECM

Josh

 

ooh yeah weres your temp gauge at like hot or cold, that could make a difference

 

It's stuff to say right now, we need more details.

Is the engine coming up to temp? Do only have the factory gauges or a set of aftermarket as well?

All the sensors play a part in getting the engine into closed and they rely on coolant temp, outside temps and more. And there is a chain of command the ECM relays on with those sensors.

Josh

 

don't forget the old standby's: pull the plugs and look at condition, swab tailpipe for soot. Does the heater get decently hot on a cold morning?

remember these things aren't supposed to be quick.

 

has a brand new T stat,so it gets up to temp.and i pulled three plugs and all three were on the white side..so its running a bit lean

 

An EFI engine is going to have pretty clean plugs if everything is normal.

Your truck doesn't have bigger tires throwing off the speedo does it?

 

oh just put a 4.0 in it already lol...

 

lol i gota 4.0 and i get about 13 mpg, buuut my 35s dont help ether lol

 

Is that factoring in speedo error from the larger tires?

Josh

 

Yeah my speedos off by 5-10 mph 5 at lower speeds 10 at freeway speeds