2006 Jeep grad Cherokee overland 5.7 hemi

Check your MAP sensor. It is located at the rear of the intake manifold on top. If it's bad it's a cheap replacement, but in a very bad spot to get too. When replacing you will have to trim off two tabs on the intake manifold to remove the old sensor and replace the new sensor. just cut the tabs off with a short piece of a hacksaw blade.Takes awhile to do this because of tight quarters at the rear of the intake manifold. Aftermarket part will cost about $19.00. A Mopar replacement part about double the price.

I have replaced the map, crankshaft, camshaft sensors and a fuel pump plus the plugs still the same. Do you have anything else to go on