okay i've been having this problem ever sense i got the car. when i start the car it idles at abou 400RPM and the SES light is on. CODE 18. if i rev it at all, even for just a second the SES light goes away and it idles much better, but it is still a bit rough.i just changed the plugs, wires and air filter. i read in techinfo code 18 is cam/crank error

Any Idea'*?
Devon

There may be a problem with your crank sensor, and I can't comment on that, but I can say that there was once a time when my '93 SSEi used to idle at low RPMs after starting, and it was due to a dirty throttle body.
On my '93, sometimes (usually only when the engine was warm) the engine would try to idle at 400 or 500 RPMs after initial starting. If I did nothing and let it continue, the engine would typically stall shortly after that, but if I pressed the accelerator a little and held it for just a second or two and then gently let go, the idle would remain in the correct range at approximately 700 RPMs. In my case, the problem was due to a dirty throttle body.

These engines aren't designed to idle at such low RPMs.

Hm i'll clean out the throttle body then. hopefully that will help. as i dont want any expensive or time consuming repairs