94 4runner with 99 4x4 4runner 3.4 engine. I have made the swap now I am trying to get it road worthy. It was running strange but running none the less. I hooked it up to a code reader and it said that the maf sensor was screwie. So I did some investagating and I found that I had a maf meter off of a 98 and it isnt compatable with the 99 computer. Now I bought a salvage yard 99 maf meter and made a hole in the air intake so I could fit it in there and test it to find out if that was in fact my problem. Now with that maf it will run for about 2 seconds and die. With the 98 maf I was able to idle and even drive around the neighbor hood but it would run real rich. With the 99 maf could it be that I dont have it located in the right area of the air intake and that I need the complete air intake off of a 99.

P.S. The maf from the 98 looks completely different from the 99.
Thanks,

Chopps

 

faulty '99 MAF? will the JY swap another elect part? try that

 

Different sensor, different output signal. Reset you ECM, and try it again with the 99 sensor- also look for possible vacuum leaks around you new sensor mounting.