The radiator and cap just replaced, tune up and oil change current. 1999 jeep cherokee 2.5L 4 cyc engine losses power after this last servicing. i use o'reilly octane booster and so far this seems to help more than anything. the stop engine light will come on for a sec when i'm lossing power. i pull over to side of hwy and it cranks right up. my mechanic doesn't know what it could be if the check engine light is not staying on. any suggestions are greatly appreciated. thank you in advance for your help.

YOU NEED TAKE VECHICLE TO AUTO ZONE OR ANY AUTO PARTS STORE THEY WILL CODE SCAN VECHICLE FREE TO SEE WHAT CAUSING CHECK ENGINE LIGHT TO TURN ON.LOSING POWER COULD BE TRANSMISSION SLIPPING CHECK TRANSMISSION FLUID LEVEL OR YOU COULD HAVE PLUGGED EXHAUST SYSTEM.HAVE CAR SCAN FIRST TO KEEP SPENDING A LOT OF MONEY TOO MANY NEW PARTS.

You don't really have a mechanic that has much knowledge

Without the vehicle to test drive & do some testing on it,
there is no way to just guess & I suspect you wouldn't
understand any of our suggestion anyway.

Find the best established shop,one that has been in the same
family for 20 or 30 years

You have to go on a road test with these people before you
leave a vehicle. Be part of the solution,go to the shop on a
supprise visit & as a lot of questions,walk into the service bay

If that isn't some they want you doing take your vehicle &
go elsewhere.
So what test tools they have,study obd2 on internet & have some
trick questions ready to fire off.