I've got a 93 DelSol Si automatic and lately it's been idling hard and shuddering in nuetral and park. Boyfriend thinks it the plugs, but I changed those a couple months ago. I did recently take off the fuel rail and the injectors, but I don't think that's what would be causing it and the car just started doing this a couple days ago. Every thing is pretty much kept up. Tranny fluid is good, oil changed, new spark plugs and the timing has been adjusted. Sooo, any advice would help me out.

 

Is it when the a/c is on or what

 

Nope, I never run the a/c.

 

Did you change the cap, rotor, ignitor, wires? If not try that.