ok so when i get on it and i go to shift.... the rpms keep on agoing while my foot is not on the gas pedal its like im power shifting but im not trying to at all ( sweet though throwing it in third AND JUST TARRING ***. WHILE MY WHEELS ARE SPINNING IT FEELS LIKE A MONSTER IS THWOING ME HAHAHA) ... its scary when im not really trying to get on it when this happens cause the rpms get up to 8 grand sometimes.....no good. i know but we cant figure it out... any sugestions?

 

I start by checking all the linkage. Mybe a spring is hanging up or something. Just a guess though.

 

check the cable too, maybe it's rusted inside or need lube. what about the pedal and maybe the floor mat?

 

I have the same exact problem and I'm also stumpt. On mine the pedal doesn't get stuck or anything but rpm just keeps rising. I've checked all of the linkages and they're all fine. My next step is to change out my throttle cable but none of the parts stores here have the one for rx7s so I'm gonna have to go rape another car and hope that it won't have the same problem. I'll let you know if that fixes the problem.

 

yea same here the pedal doenst stick just rpms keep rising for me too.... that would be awesome if you could keep me up to date. thanks

 

My pedal used to stick and it was because of the cruise control wire. When I reved the motor it would stick and the motor would stay at the same rpm (around 3 or 3.5k). This was caused because my cruise control wire casing would come out of its metal sleeve and get stuck.

I think the best way to fix it is to get a friend to push the gas while you are looking at the throtle body or carb and its linkages.

 

lube everything....

 

Also, on all cars you will find a small plunger looking barrel that is attached near the throttle linkage that causes the engine to reduce in RPM slowly when you let off the throttle - this is to prevent the butterfly valves from slamming shut when you let off the gas at high RPM. In other words, this plunger may not be returning back to idle setting slowly, and may be sticking in the full throttle position, preventing the throttle from dropping the RPM at all.

The Mazda name for this part is the 'Dashpot' and it's located right where the main throttle rod comes out of the carb on the left side (my FSM pictures are too dark to tell, and I have an EFI car, but I know it's there). This part is probably gonna be expensive at the dealer, so maybe scrounge a part from another car? Good luck,

 

thansk il try to check all this info out.

 

Junkyards rule! Youll find one there or ask around, bound to be someone here who has an extra

 

my buddy zach is ripping his out of his old busted carb and we are just going to switch them out and hope for the best thanks again everyone.

 

woops hahaha i hate sharing computers !!!!