'06 2.4L 40K. I was having sputtering problems and cylinder misfires so I cahnges the plugs. Made a huge difference, starts easier has more power, no more misfires, etc... My problem is when Im stopped on a hill at a light, when I put it in first and try to take off it sputters a bit and has trouble catching before it takes off. On flat ground I have no trouble with the clutch and gas it takes off smoothly (and no it's not me I have owned manual trans cars my whole life and I can drive it) But when It comes to even a slight hill it's hard to get going from a stop. Once it goes it's fine climbing hills but it's just the initial start from a dead stop. Any suggestions of what it could be?
Did fuel injector cleaner 2 fillups ago, I only had an error code before I changed the plugs, it was random/multiple cyl. misfire. The new plugs fixed that and made it drive 10x better. Now it's just sputtering on a hill it used to do it from a stop anywhere but not since the new spark plugs.
I've also noticed that after I drive it for a bit and I'm stopped while it's running sometimes it idles a little rough.... nothing major but now then it will give a little shake while it's sitting there, might have something to do with the problem as a whole....don't know what to start checking...only 40K on it im starting to get a little annoyed.
40k, its still under factory warranty isnt it? im thinking fuel too. i would get a fuel pressure gauge and hook it up to the rail and see what your running. could be a long list of things, pick up tube in the tank clogged, pump relay dieing, pump dieing, check valve, ........ theres alot in the fuel system to check.
I'd hate to say it but I got an 06 with the 2.4l 41k and it does the same thing. If I'm moving I can climb a hill just fine but from a stop it sputters a bit and is a pain to get going. I haven't changed plugs yet but I'm gonna soon I just think it the 2.4l I could be wrong and if any1 found a problem I'd love to know also. I know thays no help but 2 jeeps with practically the same problem hmmmm?
my 4.0 does the same thing, i dont really have an issue to get moving that i noticed. but does idle ruff and i have to give it a LOT more skinny pedal to get up to highway speeds.
the other day i filled up with 89 octane fuel just for S&G's to see if anything would change. it took about 4 miles before i really noticed a difference. stopped idling rough and had a ton more power. Today i put 87 back in and it started running like crap. Part of the reason i think is because all the stations run E-10 for 87 octane fuel. with 89 i do not think that it has the 10% ethanol. try running the 89 and see if that helps.
The ethanol fuel cleans when it gets sucked through your fuel system. i know a guy that was driving an old 81 f-150 with the 4.9 inline 6. He decided to try to run E85 one day. E85 runs a lot leaner than gasoline. he already knew that but what i did not know until afterward is that it cleans the fuel system. so he started running half E-10 and 89 octane for a couple months until he quit clogging up fuel filters. Then he started slowly mixing in E-85 with the 89, turned up the fuel mixture and jumped up a size on the jets. that truck runs clean today with almost 300,000 on the odometer and never had any motor work done to it.
it was back in 05 when this gentleman was trying out his experiment.
just try to run the 89 octane and see what happens. in my area the 89 is not 10% ethanol yet and i think that makes the difference.
1977 Cherokee ChiefEdelbrock 1406, 33X12.50, front 1.5 inch shackle lift. AMC 360, th400 Quadra-Trac
2002 wrangler, stock 4.0, auto, 33X12.50 maxis buckshot, AEV Highline Body kit, Ford 9 inch rear end.
Soon to come mods: 4" full traction lift, 4.56 gears, 35X10.50R15 boggers, 35X12.50 cooper st tires, spooled rear end, and much more.
Adawg- I guess that calms me a bit. Atleast I'm not the only one. It's not terrible just seems like it's starving for fuel a bit on a hill, like it's not getting pumped fast enough since the gas is sloshed to the back. Changing the plugs made a huge difference though, the ones I took out were not bad but the tops where they connect with the wires were pretty dirty. Change the plugs and let me know if anything changes for you.
As far as ethanol gas goes, I have not put gas with ethanol in my tank once yet. Where I live most of the gas stations pride themselves on being ethanol free for all grades of gas. It's cheaper to and you get better milage. I will try a higher grade of gas and see what happens, thanks for the input.
I'll definately see if replacing plugs and wires make a difference. I use 87 octane havent seen 89 around here but did stumble upon 88 octane the other day and filled my tank and I don't think my Jeep liked it very much.