THANKS YOU VERY MUCH FOR YOUR INFO(TOYOTA ED).. I HAVEN'T HAD THE CHANCE TO CHECK THE MAF, MY SISTER TOOK HER CAR TO A SHOP.. BUT ONCE SHE GETS IT BACK I'LL CHECK IT OUT.. I WILL KEEP YOU POSTED AS WE FIND OUT THE PROBLEM. ONCE AGAIN THANKS.. HAPPY HOLIDAYS!!
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You know that you have a boost sensor I know you said MAF sensor, but some make and engine size has a boost sensor when this sensor goes you lack power as you described. so make sure this sensor vacuum hose is hooked up it also acts as a MAP sensor. give fuel when you accelerate
Replaced the MAF sensor - nothing. Took it to a authorized toyota shop & checked compression which check out good and put the computer on. Computer read mis-fire on cylinder 1, and then multiple misfire (like it would jump around). We went ahead and replaced the fuel injector on cylnder 1 - did not solve problem as when we hook the computer up, misfire seemed tp stay at idle and seem better when running high RMP, but check engine light is on as it never went away. Went ahead and replaced the coil pack to cylinder 1 - nothing. what am i missing?
the IAT sensor is built into the MAF sensor. you must replace the whole assembly. Measiring resistance at terminals 4and 5 at 100f should read about 1000-2000 ohms. you can try cleaning it, if its not shorted or open. I cant find any purple/black wire, what is it near? does it have a connector on it? male or female, and how many cavities?
Go to your auto parts store & buy a can of "brake cleaner". Remove the MAF and spray it until the wires are shiny.
Do not use compressed air, that will break the wires.
BTW, the cat is covered for 8 years, under warranty.
it might be your fuel injectors. The fuel injectors have been recalled. My 2000 gts was hesitating and i had the injectors cleaned and that fixed the problem. A month later i took it in for service and was advised that there was a recall on the fuel injectors.