98 Rodeo Gas mileage

"Matt" jotted down a note in news:bu13l4$c5c58$ snipped-for-privacy@ID-193149.news.uni-berlin.de:

I ran into this problem and I started using a gas additive to clean the fuel injectors, have not got back to the original mileage but am pretty darn close.

That's about the only thing I really haven't tried. I've always been a bit leery of gas additives/fuel injector cleaners, but I guess it's time to give them a shot.

change your O2 sensor(s)... when they start to go, your mileage starts going down the toilet.

HTH, Bret

Timing chain & gears?

no chain or gears... the cams are driven by a belt.

-Bret

And I just replaced it a couple of weeks ago... but thanks...

Thanks, I'll give it a try.

Ah. Didn't know that. I have a 92' with a 3.1 and I forget that it's a completely different engine.

Just out of curiosity... you wouldn't happen to have any idea which I would need (I've never changed an O2 sensor before)? I see the following Standard Motor Products: Upstream Sensor MT, Upstream Sensor AT, Downstream Sensor MT, Downstream Sensor AT. And then I see an AC Delco HTD Oxy OEM Sensor, part #AFS105.

to be honest, at 175k, they all need to be replaced... my wife's 93 rodeo has an O2 replacement interval of 90,000miles as specified by the manual.

-Bret

you wouldnt happen to be the cold winter seson nys area running gas w/ ethanol,that will do it every time ,at least on my 95 passport LXW4X4 3.2V6

Many shops do not recommend cleaners. While they can help clean the injectors, they also tend to damage the injector seals making them leak over time. If the vehicle is high mileage they may be leaking already. Smelling faint gas fumes especially when the engine is cold is a common sign of leaking injector seals.