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2003 Mercedes-Benz CLK500 Question: engine missing



Barryc, Northbrook, IL, April 20, 2009, 16:30

I mistakenly put 89 octane gas in. Now the engine occasionally misses and sometimes stalls. I have refilled the tank with 93 octane gas. Will this correct the problem,or is there more I should do?

2 Answers
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  • Answer #1

    April 20, 2009, 18:26

    Is should correct itself because the computer has to adjust the knock sensor to make up for the lower octane fuel so it might take a tank or two

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  • Answer #2

    Visitor, August 06, 2010, 14:53

    if you look under your hood you will find your engine, it is not missing. seriously it takes about 10 driving cycles for the computer to advance the timing, low octane fuel causes the knock detector to go on and the computer retards ign and riches fuel very quickly to avoid engine damage, much more quickly than it goes back

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