Help! I have 2006 jeep Commander 4.7 8 cylinder w/ 207,000 miles on it. I keep up with oil changes. No engine lights or warning signals. Just had wheel alignment done and fuel usage has gotten worse. Twice a week now to 3 almost 4. No shakes or pulling. Note I do have used tires(mixed) on it, though before this started happening, it was not an issue with gas mileage. More info: bought from salvage lot 150,000 miles, changed a few sensors.(thanks Scotty!) Should I try and change plugs(tune up)? or is this a sign of things to come. I'm not burning oil.
I wonder if the alignment was done correctly. Any possibility to correct it for free?
I drive straight. No steering wheel shake, and I don't veer left or right when I let loose of the wheel.
What about tyre pressure? Do you check it?
Go for the basics - air filter, clean MAF and MAP sensor.
all replaced.