[naz]

steve i can't find anything that parts list that sheds light on this.. maybe you are right and that chip is fundamentally different from the one chipguy uses.. or maybe that chip just has something like.. "if you go over 5V MAF signal just dump a crapload of fuel into the motor and back off the spark timing to keep the motor from grenading"

as for that inline resistor.. all those SAFC and other stuff that honda guys love are just that.. devices for applying a transfer function to the MAF

you should do a bit of digging to find out if in fact the chip is just dumping a whole bunch of fuel after a certain point or if it really does have the ability to properly control the motor.... right now i'm speculating that your PCM does not have full control of the motor after a certain point when the amount of intake air gets too high

chipguy was pretty adamant about the PCM tables that had MAF output as one of the input variables not having values after 5V.. but again.. i am clearly run out of tech and borderline speculating based on the 2nd hand knowledge...

as for the MAF.. i believe we have a hot wire MAF, and a wire is kept at a constant temperature differential relative to a thermoresistor.. the more air passing through the MAF the faster the hot wire loses heat, and the more current the MAF needs to keep up the temperature differential. the current used by the MAF to maintain the temperature differential is also the MAF's output signal..

the curves of MAF output v. airflow i've seen look logarithmic, with the MAF output seemingly bounded from above at some value (presumably 5V in our application)