My friend have a 05 evo mr. Today i install the SAFC for him. Every wire is correctly solder and tap. i run a shop and this is the 36 safc i have install. Anyway what was really weird about this is that the SAFC work when the car have just turn on. I can kill the car idle by leaning it out the lthrtl map, but once the car move like an inch and me trying the samethign again even at -50 the car still idle normally. Sometime at stationary i would rev the rpm up and once i let go of the gas, the RPM would stuck and boucning up and down between 2000-2200rpm. I even disconect the SAFC and put everything back to stock. went for a test 3rd gear pull and log it wiht a pocketlogger. It show he's knocking from 3k-6k with a negative number on the timing. I have never seen that beside timing pull, but negative timing
??? WTF.

 

bump for help

 

bump

 

What other mods are done to the car? Sounds like maybe a vacum line came lose. Same thing happened to some guy at the track vacum line came off popped it back in zip tied it and voila fixed. Check are your vacum lines

 

bump for you that is crazy
check your wiring again and initialize

 

its probably not related to the afc then

 

yes i have check everything. he bought the mr used and it got about 3-4k on it from the dealer. i wonder why the previous owner return it?? he got nothing but an MBC, DP, and cat back

 

I'm having the same problem with mine. I have an 05 MR too. If I rev it up fast and then put the clutch in; the rpm's stick at 4000rpm and the go down to 3000 rpm and stick there too. If I rev it up again to see if it will release it but it works some of the time. I have HKS blow off, MBC, Drop in filter and then the SAFC II with plug in play harness.

 

wow old thread. anyway yeah some SAFC are defective. anytime this **** happend to my customer. I just swap the SAFC out with another one and it works.