when i start from 1st gear, the car jerks quite violently after i apply the accelerator and the engine feels like it is gonna stall. the car jerks as well while im cruising even though my foot is still on the accelerator. this problem comes and goes and doesn't happen often. what could cause this problem? pls help, cause im worried that this problem will worsen. thanks!!!

 

Jerking usually means that you have an ignition problem. I had the almost identical thing, and had the spark plugs replaced. May as well have them do the wires while they're at it. That did the trick.

With the 3rd gen RX-7s it's very easy to get all kinds of crud built up on your plugs. They need to be changed regularly.

Alex.

 

Replace your plugs, and run your car regularly at 160 mph to keep the crud from building up on the plugs. Caution--make sure your car is equipped with an aftermarket wing, set to yield a drag coefficient of 0.45--apparently it's well-documented by NASCAR aerodynamicists on the Rx7 big list, that the stock R1/R2 wing doesn't work (regardless of personal experience with the stock wing!)--but wait, with a drag coeffecient of 0.45, you won't reach 160 mph! You'll just have to make do with 140 mph...well, at least your spark plugs will be clean, and your car won't jerk you around anymore...

 

But i just changed my spark plugs a few months ago. could it go bad so soon?

 

bump