Our Community is 940,000 Strong. Join Us.


low gas mileage


walkswith
07-13-2004, 09:00 AM
The gas mileage on my 99 Trooper is way down. I drive about 60 mi round trip to work 4 days a week on an interstate so mileage should be at the Trooper's best - not that great but not bad either - 19 mpg. It's down to 12 or 13 mpg. What can be the problem? ERG valve has been cleaned, some gaskets were replaced, no change. Any suggestions? I like my car but this is a really high cost drive these days.

mlingk
07-27-2005, 07:50 AM
Perhaps your O2 sensors are going bad? I also just read another post from somebody that replaced their cats and their mileage went back up. My 99 is getting 15.5 right now w/ AC running. Seems a little low, but after reading about other troopers getting in the low 20's, I'm considering replacing the cats also.

amigo-2k
07-27-2005, 08:47 AM
Also a leaky intake manifold gasket is also a common cause.

Add your comment to this topic!