2002 cl600 had misfires on 456789 cylinders
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2002 cl600 had misfires on 456789 cylinders
Hi, i have just aquired this car & it has been sat unused for 4 years, it was in limp mode & showing misfires on 456 789 ! I have now fitted new plugs & insulator boots but its now running terrible and worse than before ! It starts but wont idle, runs rough and backfires terribly
any ideas ? The original plugs were shot so i at least would have expected it to run better than before
any ideas ? The original plugs were shot so i at least would have expected it to run better than before
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Joined: Dec 2007
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2005 S500 Designo
There's no quick answer with the information provided.
You said the plugs were "shot". Was there a lot of oil on the threads? Is your valve cover leaking? Oil wicks up and destroys the ignition coil. It's a little weird that it's 456789 because those are on two separate banks.
You said the plugs were "shot". Was there a lot of oil on the threads? Is your valve cover leaking? Oil wicks up and destroys the ignition coil. It's a little weird that it's 456789 because those are on two separate banks.
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Joined: Oct 2024
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Ok, so since my initial comment i have discovered an air leak on the ‘ plenum ‘ chamber
(bad rubber seal) on bank 7/8/9
car now starts & idles far better but i still have a misfire on 4/5/6 ,
i am going to try the o2 sensors before shelling out on a coil pack etc
when i said plugs were shot , they were avtually rusty with signs of arcking , some of the boots were hard & with signs of damage , there was no signs of oil seepage
(bad rubber seal) on bank 7/8/9
car now starts & idles far better but i still have a misfire on 4/5/6 ,
i am going to try the o2 sensors before shelling out on a coil pack etc
when i said plugs were shot , they were avtually rusty with signs of arcking , some of the boots were hard & with signs of damage , there was no signs of oil seepage
