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rough idle

  1. HELP! Very rough idle when cold and stalling, with video

    E39 M5 and E52 Z8 Discussion
    Hi all. My M5 has recently developed a very rough idle only when the engine is cold and not fully warm. Initially when it began happening I found that the 2 breather hoses in front of engine bay were completely deteriorated with holes and tears in them (which is common) so I replaced them...
  2. Rough idle -> tune up -> rougher idle

    E60 M5 and E61 M5 Touring Discussion
    Hey all, I'm perplexed. I had what seemed to be the common issue of rough start and idle after filling up with gas. I searched in the forum and decided to change the charcoal vent canister in the passenger wheel well. I also took the time to change the plugs (didn't break any of the coils!)...
  3. DME VIN/PN# Does NOT match car!

    E39 M5 and E52 Z8 Discussion
    So, I have been having some vanos issues lately. You can find the thread "Vanos Solenoid!!!" and read the back half starting on page 4 of what has been going on. I pulled the DME after tracing the wires in the engine bay checking for any signs of tears, shorts, grounds, open circuits...
  4. E39 M5 VANOS Board Jammed

    E39 M5 and E52 Z8 Discussion
    I do apologize, this might be a long post. :typing: Well, I'm in a little bit of a jam, literally. The good thing is, its just the solenoid board is jammed inside the vanos unit. The background information: My M5 was idling a little rough, loss in power, 3rd gear pulls would throw it...
  5. For Sale: Vanos Solenoids

    Parts / Other For Sale or Wanted
    Hi folks, I have a surplus of vanos solenoids for sale if anybody needs any. I've sold 4 so far....3 left. Inquiries to . Regards, Stephen
  6. Multiple Misfires, Rough Idle Once Warm, Power Loss = No Fun

    E39 M5 and E52 Z8 Discussion
    Hey everyone! New Beast owner looking for help (bet that’s the first time you heard that phrase). Here are the symptoms: Car will seemingly start fine when cold, but idles very low (no more than 500rpm, or in other words, the needle usually rests on the top of that first little dot on the...
  7. VANOS solenoid / rough idle fix SUCCESS

    E39 M5 and E52 Z8 Discussion
    A few weeks ago I posted to this board regarding a very rough idle in my ’00 M5, along with loss of power and occasional misfires. After much research and help from members of this board, I decided to remove the solenoids and see if they were the culprit. I am pleased to report that after...
  8. Sharked Beast rough idle and hesitation...HELP!!

    E39 M5 and E52 Z8 Discussion
    I had a burnt clutch incident recently (see here: ) I had it replaced and I decided to mod the car while at it. I ordered up (among other things) a Jim Conforti Shark Injector from TurnerMotorSport (excellent service BTW). So I waste no time...