full_jingbang Posted May 12, 2012 Report Share Posted May 12, 2012 Engine doing some missing when:- the car is in final gear and rpm on 1-1.5 and I accelerate slowly to increase the speed. Mech. checked the spark-plugs, cables and computer, everything is ok, then he told me to put fuel 95oct. instead of 91Oct. I did that, which reduced the missing but did not finished at all. Any bright ideas ??? Quote Link to comment Share on other sites More sharing options...
Feirstein Posted May 13, 2012 Report Share Posted May 13, 2012 Even if the engine motor light is not lit you might be able to pull some codes if you plug in a code reader (located under the driver's side dash). Without a code this can be hard to resolve. If the mech recommended higher octane fuel you perhaps need to find a different mech. (Higher octane is only needed if you hear a ping or a knock, it has nothing to do with a miss, and an mech worth his salt would know that). Quote Link to comment Share on other sites More sharing options...
full_jingbang Posted May 13, 2012 Author Report Share Posted May 13, 2012 thanks for your reply, BUT, as I said above, changing the gas type worked but not 100%. it reduced the miss-up a lot about 70%. Quote Link to comment Share on other sites More sharing options...
c_bova Posted May 13, 2012 Report Share Posted May 13, 2012 why are you using higher than 87 anyways? Quote Link to comment Share on other sites More sharing options...
akirby Posted May 13, 2012 Report Share Posted May 13, 2012 He's in Saudi Arabia - the octane ratings aren't the same. I think 91 is regular, 95 is premium. Quote Link to comment Share on other sites More sharing options...
Feirstein Posted May 13, 2012 Report Share Posted May 13, 2012 You know, it may not be the octane increase at all, but the new fuel may have helped clear out some of the contaminated fuel that caused the problem. Keep filling it up at a different station and see if the problem goes away. Quote Link to comment Share on other sites More sharing options...
full_jingbang Posted June 25, 2012 Author Report Share Posted June 25, 2012 I put "Fuel injector cleaner" twice which reduced the missing, so I think it is a problem of fuel injector, will need to clean it more. Quote Link to comment Share on other sites More sharing options...
gism Posted May 13, 2013 Report Share Posted May 13, 2013 I had that problem. It was a bad spark plug Quote Link to comment Share on other sites More sharing options...
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