i been having w/ power problem...when i start the car and go right away..my car is like chooking to death or something...i press on gas pedal it goes then stop..go then stop...so i brought my car to the dealer to see what goin on...they run the computer and nothing come up...they said in the last week they replace 3 MAF and on 3 celica w/ the same problem...my ????? is when do you replace MAF or you just clean them...i just clean my MAF 3 days ago and nothing seem wrong..i also clean throttle also..the MAF cost about 152 and i don't want to waste money if i don't get anything out of it...my car is 63000 mile now...is 2000 gts manuel...my lift bolt seem to be fine..b/c if hit over 6000rpm it will give a lift...nothing wrong w/ that...let me know what going on pllzzzz...