One morning after i got gas from shell gas station, my car started to act up weirdly. First when i start up my car, my idle is unstable, it revs up to ~3000 rpm then dies, flooring gas doesnt seem to help unless i floor it hard. Then second time starting up and i can floor it to stabilize it for a min or two and let it heat up n it seems to be fine. When i go full throttle, the car won't go until few seconds later. Originally, I thought i accidentally put in 87 octane gas, so i've decided to put in octane booster, it seems to fixed the throttle problem, the car went on smoothly. (Later on i found out it was 91 octane gas that i put in, not 87 octane) However, the idle problem still was a concern, so i tried to take out the maf sensor and clean it w/ CRC sensor cleaner. After that didnt help, i took it to the body shop. First they replaced the air temp sensor?! i think.. cost bout 80 bucks... well it didnt help, so they tried to change the maf sensor, that didnt help either... so now they r still stuck trying to figure out the problem... anyone have ideas? thank you for your helps!!!
