My Speedometer/odometer is broken, also whenever I turn on the AC, my cars RPM fluctuates(when it is not on(ac) the idle is steady 1050. WHen the ac is on it will even stall out and goto 0 RPM at idle/not in gear, it also fluctuates down to 650rpm when in gear but clutch is pressed all the way in(brand new clutch installed by Ray@PFS)

Both speedometer/odometer/ac is wierded out, I took it to Ray Wilson at PFsupercars(nothin but an awesometastic mechanic), he said he had never seen somthing like that before, maybe one of you all know what may be wrong(mind you he did say that my wiring harness is somewhat corroded)(but I might as well get a standalone rather than blowing 750 it costs for a new wiring harness). Any input is greatly appreciated!(cept for flames><)

 

I know it cant be like a Tachometer problem because I can feel/hear the engine stuttering! Also all vacuum hoses were replaced(so I doubt thats a problem), Also 3 solenoids were replaced(for when my turbo's were broken), all my mods include:

ACT clutch
HKS superdrager exhaust(yes I love it, it sounds great!)
New radiator
Vacuum Hose job
Turbo Timer
Coils/Coil wires replaced
New Radiator Fans(that **** was expensive brand new) like 1300bucks w/ the shroud(this was before I knew of this forum/anything of RX7's),(also installed by a local mechanic shop, who doesnt know much of RX7's)(I know I was ripped off).

Any help prx!