ight well i just replaced the spark plugs and the start. i go and start it up and it starts just fine. i then let it idle but when i hit the brake the idle jumps 500 rpms, how come its doing that? k then i turned off the car and tried to start it back up and it didnt work and is no longer working. anyone have any ideas?

was it doing this prior to you working on it

ya it did it once or twice before it and after it, it just went down hill from there.

The RPMs will change because the brake booster uses vacuum and generally causes the engine to idle up a bit. Check your distributor connections. What mods are done to the car what mods do you have/what else have you been ******* with?

I only have i/h/e. and all ive really done is changed the clutch but my problem was happening before that tho.

check the Idle air control and clean it out. or it could be something to do with the throttle positioning sensor.

how do you clean out the idle air control