1997 Jeep TJ low power on the freeway

1997 JEEP WRANGLER TJ

165,000 MILES • 4 CYL • 4WD • MANUAL

97JEEP

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i have a 97 jeep with the 4cly and when im on the freeway it is hard to get up to 70-75 and when ever i go up a smalll hill or go over an over pass i can not maintain speed, if im going 70 i will slow down to about 63-65 and if by chance i am doing 75 then i slow down to about 60. i had the cat checked and that was fine but they found a very small crack in the header. i have checked the plug gap, wires, and cap and rotor and air filter and replace them all. where should i think about checking next? people thell me that its just because its a 4 cly jeep but other people that have 4cly jeeps say that they dont have this problem!

Sep 16, 2010 at 10:00 PM

CJ MEDEVAC

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See My Profile, Imma CJ Guy....Member like you (who answers a lot), Answering is just one of my hobbies, I am not paid like the certified guys here. I just try to help and try to stay within my boundries. My answer may not help much, but here it is anyway! I do not know your Rig. 1) Have you located 2nd and Higher gears----Try shifting into them! 2) 165000 Miles may tell some of the story--things wear in your engine. 3) Tire Size---stock?.......Wide---Big doesn't help. 4) Have you got a repair manual?....Fuel Economy means Efficency!......They are discussed within. 5) Additives such as Oil stabilizer might "Slicken" the engine up 6) Weght----We will let you hash that out with him/her/other!........I have my Standards, and You have yours. 7) Timing????????? No mention! 8) Vacuum Lines / gaskets and related gizmos broke/worn/deteriorated causing vacuum leaks? 9) Injector Cleaner? 10) You may be able to find a "Performance Chip" for your rig---Maybe....Try 4WD Hardware and Others for this item....if your rig will accept one.......Remember Imma CJ Feller Explore the CJ 5 and CJ 7 posts other stuff there might interest you! Here's my 2, No "Sissy" Names for "Rugged"---"Manly" Vehicles: "Mr. Jeep" 1977 CJ5 258 6 cyl w/ 390 4bbl Holley

"WILLY" 1946 Willys 4 cyl L-134

Let me know if this stuff helps I'm here, anytime you want to talk "JEEP" My Profile reveals stuff I will share if you are interested. The Medic

Sep 17, 2010 at 11:40 AM