jeffro9944

95 XJ.....Does anyone else have to clean their throttle body very often?
Started idling cold at 2500 rpms and hot at 1500 rpms. Removed and cleaned it now it idles fine.

OneWheelWonder

you shouldn't need to clean it very often.. However more maintenance the better! Use a higher grade gas and it helps keep it a little cleaner, as well as check your air filter in the air box... A new one is cheap and helps a lot.

Crash_Course

Depending on the extent to which you "cleaned" your throttle body, you may have alleviated a sticky idle air control valve or even remedied a vacuum leak in the process of disassembly/reassembly. Hard to say really, without a more detailed description of what was done.

'90Cherokee

Yup.

jeffro9944

Well there is not much to it, guessing it's all in the idle air valve.
My air filter looks ok, I was surprised the throttle body would get dirty very often

cruiser54

Every tune-up, which is 30,000 miles when you replace plugs, wires, cap and rotor.

HappyTrails

I totally agree with Cruiser here. Clean both the TB and the idle air valve at the same time. It is good to remove the idle air valve and totally clean the scum off of it. And clean inside the TB area where the valve plunger seats. Hard to see on a 95 since you have to look from the back, but a small mirror helps. Also put some grease or anti seize on the small mounting screws. They tend to bind in the aluminum TB with time if never removed. If not, they can snap off and make for a really bad day.

I have had Renix and post-Renix 4.0 Jeeps. Seems the Renix ones needed more attention to this cleaning chore the the later ones.

Also, make sure the small tube and fittings from the valve cover to the intake manifold are not cracked. This will cause hidden vacuum leaks and idle performance issues. A temporary field fix it is to use some gasket sealer (HondaBond is my fav) on the cracks until you can obtain replacement parts.