you don't have to because I know what the problem is, most guys in the Middle East fill their jeeps with premium gas (fact: gas is cheaper than water there) and since you are in Saudi you probably fill it with 95 octane gas, DON'T, use the 91 octane or even a lower grade if you find it. my brother in Dubai had the same problem with his JK and he spent more than a 1500 bucks to fix it but no use, we checked his fuel/air ratio and that was fine, he remapped the ECM and that was useless, changed the headers but that didn't work either, he later found out that most of his friends that have JKs have the exact same problem, the dealership couldn't identify the problem cause all the ECM readings are fine until one of the guys that worked there (a janitor I swear) asked about the gas grade and advised them to switch to regular and VOILA problem solved..... =)