A little Putter...
 

So when I idle my 87 Rx7 GXL it sputters/putters in a single or double spurt then is fine then a few seconds later does it again. It doest really mess with the idle. But its like almost lil back exhaust or back fire not really loud. Just a little...putt...putt putt...would air filter, plugs, and maybe cleaning the injectors help?

Search for info pertaining to the TPS and address that issue and see if it helps.

Thanks good sir ill get on that actually this weekend.