?Rough idle CA18DE

[russ88]

Can anyone help with a rough idle problem? Don't seem to have a vacuum leak. Low rpm almost a miss but not. Help/

[boost_boy]

Can anyone help with a rough idle problem? Don't seem to have a vacuum leak. Low rpm almost a miss but not. Help/

Possibly bad coil pack, possibly a bad crank angle sensor or broken exhaust camshaft key; it could be anything. We need a little more info to help you with this.

Dee

[Nunook]

I also have alittle rough idle and planned on trying to clean it up tomorrow. I have so far tried to increase fuel alittle at 500rpm on fuel map. Didn't do anygood.I also took my coilpack harness out and changed the 1 wire that grounds all 4 coilpacks to the back of the head. I made it into 2 wires and alittle thicker gauge(wanted to do this for a while). barely helped and tedious work. Tomorrow Im goin to hook up the romulator and work on it alittle. In my case Im pretty sure its fuel related. If I press on the accelerator just enough to get the rpms up to ~950-1K, it clears up. Maybe ill just adjust the screw on the throttle body?

[russ88]

Thanks for your help. Here is what i've tried so far. I have swapped out the coil packs and crank angle sensor with used ones from a yard. I replace a bad transistor module when we first got the car. I have also replaced the spark plugs and knock sensor with a new ones. Sometime back I installed a new water pump and looks like the Crank gear and timing belt had been reolaced by the previous owner. Car was running okay, This is a recent problem. How about a dirty MAF?Thanks

[Nunook]

maybe dirty maf, or dirty Idle air controler.

I increased the fuel at 800rpms/idle area to 14.7a/f and it got better. In my case I think my injectors are sticking. Ive had the prob for a while now, but never really bothered to fix it.