My friend has a 2009 Fit with 32,000 miles.
During a routine oil change, I noticed a subtle vibration at idle as well as some engine "clatter" or metallic tapping noise during light acceleration. When the engine is warm, the vibration is fairly light (though still noticeable), but the vibration is more pronounced during cold start-up.
So earlier today, I brought the vehicle to the dealer and mentioned this problem and asked them to look into it.
It was a slower day and they had a few techs look at the car. The tech was able to duplicate my concern that indeed, there was a subtle engine vibration at idle.
According to the tech, he found in the stored data list that there was at one point, a cylinder #3 misfire. The report also stated that he found the short-term fuel trim to be at 1.02 and the MAP sensor voltage to be at 0.96v.
The tech's resolution is to first adjust the valve clearance, then proceed from there. They have to order a valve cover gasket and a few other gaskets in order to do the work, so they want me to drop the car off next week for them to finish the work.
My Mitchell info shows that an in-range ST fuel trim should be between 0.69-1.47, but I am not sure what an "ideal" reading would be. I don't know what the correct operating range is for the MAP sensor though.
Personally, I am not sure how a valve adjustment will solve the engine vibration problem, especially since the car is not showing a CEL right now, or has it ever.
What do you folks think is the problem?
During a routine oil change, I noticed a subtle vibration at idle as well as some engine "clatter" or metallic tapping noise during light acceleration. When the engine is warm, the vibration is fairly light (though still noticeable), but the vibration is more pronounced during cold start-up.
So earlier today, I brought the vehicle to the dealer and mentioned this problem and asked them to look into it.
It was a slower day and they had a few techs look at the car. The tech was able to duplicate my concern that indeed, there was a subtle engine vibration at idle.
According to the tech, he found in the stored data list that there was at one point, a cylinder #3 misfire. The report also stated that he found the short-term fuel trim to be at 1.02 and the MAP sensor voltage to be at 0.96v.
The tech's resolution is to first adjust the valve clearance, then proceed from there. They have to order a valve cover gasket and a few other gaskets in order to do the work, so they want me to drop the car off next week for them to finish the work.
My Mitchell info shows that an in-range ST fuel trim should be between 0.69-1.47, but I am not sure what an "ideal" reading would be. I don't know what the correct operating range is for the MAP sensor though.
Personally, I am not sure how a valve adjustment will solve the engine vibration problem, especially since the car is not showing a CEL right now, or has it ever.
What do you folks think is the problem?
