I have a 1997 Jeep Cherokee TD Limited. The engine pulls fine until it hits 2000rpm then ''restricts'' power. This happens through all gears. I believe this power loss is probably the ECU going into ''limp home'' mode. Is there any reason for this power loss you can advise me on. I have checked engine codes and I get 12,44 and 55 on engine check screen. I have also replaced the MAF sensor as old one was knackered. I have also checked the Intercooler pipes to ensure they are not collapsing therefore restricting air flow. Cheers Darrell

Assuming this is an automatic, the linkage could be caught between gears. This happens when a motor mount is broken and the engine has been punched to high rpms. As the engine rocks over, the linkage comes out of alignment.

Place in Park, Turn the engine off. Open the hood and manually pull the throttle cable wide open as far as it will go. Repeat a few times. While you are there check all three cables as they attach to the throttle bracket. If all is well the next start up should be fine.

Run a fuel pressure gauge where you can watch it while you drive and see if you are loosing fuel pressure. Also make sure you do not have a restricted exhaust system.

Whenever a check engine light comes on it is a sensor sending a trouble code to the cars computer. You need to take it in to a mechanic and have them hook a scanner to the comnputer to pull the code and then they can tell you what the problem is.
Good Luck!

Pull the alternator brackets and front engine brackets off until you get to the water pump. You will also need to remove the fan shroud and then the fan. Remove the water pump and then you will see an aluminum cover and that will be your timing cover. remove the cover and clean all the gasket off the engine and the cover. use a razor blade, and make sure there in no oil or grease on the parts where the gasket lies. Put your gasket on, bolt the cover back on with the new gasket and repeat the teardown process in reverse.

possible vaccum leak.

HI, It may seem obvious, but sometimes overlooked.... have you checked the oil level, as low oil can cause some strange things to happen! My 96 4 liter would be reluctant to move sometimes, but after I topped it up, it has been fine.

It sounds like the reverse band is out of adjustment. Three things can cause this, reverse band, front clutch and the overdrive direct clutch. To test the band, drive the truck in manual low up to 25 mph. Then let off, if the transmission doesn't pull the engine down, the band needs adjusted. If the front clutch is the problem, 3rd gear will be act weird too. The only test I know of for the overdrive direct is to inspect it, so process of elimination will have to work. Hopefully the problem is the band, because you can pull the pan, service the trans, adjust the band, and be done. Any of the other problems and you are looking at a rebuild. Good luck.

need new gear box

Yes you have a Transmission problem that is only going to get worse.
There is nothing to do now that will solve this problem. You can pull the dipstick and look/smell the fluid to verify this but unfortunately the only thing to do now is have the transmission rebuilt/replaced.
Sorry to be the bearer of bad news.

Hi,

Pls see this link, my reply to a post parallel to your concern.

Basically the lower the differential/axle gear ratio the better on the mileage, a little faster but poor pulling power. Most vehicles meant for highway driving would have a lower ratio. I was also made to understand that there are some Jeep versions that have as low as 3.73.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

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