My 85 GSL 12A runs bad. My mechanic buddy says I need a Throttle Position Sensor (TPS). The car has difficulty in reaching 60 MPH. The idle is terrible. I have installed new spark plugs, spark plug wires and air filter. The car has very little power. My mechanic buddy checked the timing and suggested replacing the TPS. I think the carburator is a stock Nikki. I look for vaccum leaks and could not find any. The car is all warm up when this poor performance is experienced.

 

Find a new mechanic

 

Preferably one who's had actual experience working on rotaries.

 

I agree, last time I checked there wasn't a TPS on a carbed motor

 

I thought this was the throttle sensor on the nikki.
Did you just get the car? Probably needs the carb to be rebuilt if it looks anything like this one. If it's been sitting for a long time I bet the air bleeds are all cloged up.

 

there is a TPS i just dont know what exactly it does its like on off switch or something.

waysrx7 yes that is one

 

believe it or not we had an really clean 81 come in, that needed a tps. the tps was intermittantly bad, and when it failed, it closed the shutter valve= 1 rotor = no power.

really really rare though, usually the shutter valve is bad...

 

it runs the emissions system, air control valve, shutter valve, and the vacuum advances

 

check this out it saved me from giving up on my car http://www.mazdatrix.com/faq/shutter.htm, by the time I had found this link i had already rebuild the carb and had two shops abuse my car trying to figure it out, but found this to be the original problem once i got it back.