Hi...new battery, cam sensor, alternator, starter installed ...was having off and on issues with it firing and even idling at low speeds...replaced the idle air control valve and it was like night and day until today...so two weeks no issue...then bam!!! Got it started this am wouldn't idle....tried 4 times and finally able to drive...started it at noon and no problems! Really confused to the problem help! not throwing codes either ...lindsey...this is a 97 jeep grand Cherokee lerado 5.2 liter v8