Miller maf problem

[hendrixvodu]

Hey guys ... I bought a used miller maf with a 19# 173 chip maf appears to be the correct one as I've seen through pix and checking the pn I'm pretty sure the maf it self is bad the car idles well and I can drive the car but I don't have mid throttle it just falls on its face. I do have full throttle though with no problems all the way up to redline. I called miller and the want $300 for a new maf?!? I found some on eBay for about $50-60 my other problem is I don't have the adaptor so I kind of just have the harness pushed into the pins , it seems to fit tight but I does look a little hack. My question is ... Is the maf it self my problem ? I'm also getting a cel for bad afm . Thanks for the help in advance guys !

[bimm3r82]

you have to cut pin 12 coming from the ecu harness and connect to pin 37 for the maf to work properly.. just making sure you did that :)

https://millerperformancecars.com/files/M20%20MAF%20instruction%20manual%20GEN%20III.pdf

those are detailed instructions

[hendrixvodu]

Yea I did all the good stuff already lol

[bimm3r82]

Yea I did all the good stuff already lol

lol awesome.. umm some ppl have the plug on the maf backwards.. ive heard that used to be a problem..

[hendrixvodu]

Nope got that the right way too lmfao when I first did the swap I put it on wrong I looked at a pick of another dudes car an switched the plug around and I was able to drive the car before It would braley run

[bimm3r82]

hahah damn.. umm ik when i had mine i had the plug facing down rather than up and that caused me some issues. otherwise it seems the plug could be bad.. unless its just not getting good contact because of the way you have it connected.. it would be nice if you could test it with a good one..

[hendrixvodu]

Well I ordered a new maf off eBay so we will see hopefully that works

[hendrixvodu]

New maf same problem any suggestions guys ? Is it possible my tps could be giving my new part throttle but I still get full throttle ?

[bimm3r82]

testing the tps is super easy.. couldnt hurt to check it out..