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idle rough
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  1. General E46 Forum
    I just replaced my old DISA valve with a new one ($200+). The old one was not falling apart like some people's do. It just did not close. The actuator link did not pull into the vacuum assembly. I was getting lots of P0171, P0i74 and misfire codes. Also rough idle and lower than normal in-town...
  2. General E46 Forum
    OK so here's the deal. Got water in through the CAI. :facepalm: I know, I know...that's why they make breaks, bypass valves, and splash shields, but moving on. I have pulled spark plugs, turned engine over to eject any water, replaced both o2 sensors, changed oil twice. Seafoamed the gas and...
  3. General E46 Forum
    About 6 months ago, I started noticing rough idling and a slight hesitation when mildly accelerating from a stop. Last week, on acceleration, it really started hesitating from a stop. Got a CEL and it was Idle Speed Control Valve Stuck Closed (P1501). Removed ICV, cleaned and replaced...
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