Here's my story, I bought a s4 turbo 2 back in October and it runs and drives fine....until I'm in constant boost then I hit what I'm assuming is fuel cut since the PO took converters out and freed up the exhaust flow. So I took the turbo off and ported the wastegate hoping this would cure it. I got it all back together and fired it up, it wont idle and I have to keep it above 2k for it not to die. So thought for a bit and noticed after I took the TMIC off there was no adjustment screw for the TPS, it had fell out I guess. When I first bought the car the PO told me the TPS needed adjusting that's why high rpm hesitation, so I believed him and when I got it home I tried to adjust the TPS and I noticed then the adjustment screw felt really loose and not right at all. So the lever set from Mazda is discontinued naturally and I need to figure out what size the screw is or what I can do, I got a 5mm bolt but the thread pitch is wrong, it needs to be a lot more fine of threads than a 5mm bolt. Any ideas would be great. Thanks Eric

 

Rotary resurrection on eBay has a large selection of used rx7 parts you may find the lever there, A part like this doesent ware out. Also ck around to sea if someone is parting out an rx7.

 

Just to cover all bases, are you 100% sure what you have is a M5x0.8 bolt? SAE size #10-32 is REALLY close to it, within 0.1mm diameter and 1/4 thread difference per inch in length. Probably wouldn't hurt to match it up at the hardware store just to be certain.

But at the same time, Mazda would undoubtedly stick with a metric size. The TPS mounting screws on my 20B are M4x0.7 with a M5x0.8 screw on top of the throttle body for adjustment. One full revolution nudges the throttle 0.8mm, plenty of room for fine adjustment.