performance

What I need sensor wise to "Tune" Up my 1994 4.0 HO? Want all that will balance the fuel air mixture.....She's smelling really rich at idle. All the plugs, Wires, Coil are new high performance and from a American manufacturer....Air filter a brand new Wix. Timing was set by an expert... And the...

Getting ready to change out the spark plugs on my 2006 Liberty 3.7L w/auto tranny & have a question about which type is the best. ALSO....would like to know if anyone can tell me what the spark plug oem information is on the data sticker under the hood. The rubber hood seal rides right on top...

I am done with adding accessories to this 2005 Rubicon, but I feel like something is still missing. Moving on, I will try to get some support from this community on how to modify the performance and look of this jeep. :???:

Hi I bought a 06 liberty two months ago to use as a work vehicle. Three weeks afterwards the check engine light came on during a snow storm. code said catalytic converter. two days later however the light went off. the light has never came back on. the performance isnt great but not so bad that...