Thanks all, I'll work backward and try to re-check all of them. I checked the MAF sensor and I've found when I pulled out the connector of the MAF, the car runs continuous (more than just two seconds) with huge backfires and misfires. Is it possible to have intake manifold leakage? Thanks again.

Yesterday I changed my timing belt and also the serpentine belt on my 98 XC AWD (155,000 mi, clogged pcv) After that the car starts fine like as always, but stops with jerking (sudden decrease of rpm) after just one or two seconds. (with stuttering + wobbling noise) When I tried to push gas pedal, t...