hi there,
after tuneup my 2008 range rover sports, i feel my engine sound is higher than usual, my mechanic refused to use the bosch plugs, and he used (ngk), is this might be the reason ?? i smell gas in the muffler as if it is not fully burned. can someone help please.

 

Thanks for the nice blog. keep sharing such ideas in the future as well.

 

I definitely prefer NGK. Can you describe the high pitch? Whining? Wooing noise? Whistling ?

 

it was like the usual engin voice but in higher mode. sounds like a school bus when pickup the kids and start moving.but we found one of the hoses was not attached properly, and now it is back to normal. thank you

 

how many mile per gallon should my truck do ??

 

i feel like you are making fun of me , are you ?

 

NGK plugs are the factory plugs on the jag engines that are in the lr3/rrs.