Factory plugs are fine.
Different engine, different requirements.My mistake, I thought you were inquiring about a fiesta. Carry on.
But, a quick search on google you would find a thread on a different forum that shows viable options for a colder plug. Just saying. I guess I just am used to people doing research before posting questions. Residual left over from another forum.
Those have been proven to not fit and are causing issues. There is no colder plug available for the FiST.NGK LTR71X-11....sorry, left out the 7
Definitely not a direct replacement as stated by NGK-Elaborate please...I wasn't aware the NGK spark plugs I bought, as a direct replacement for the oem plugs, don't fit and cause problems...that's weird
And a picture-JPGC said:Sekred,
It looks like you are right about it being the wrong plug for these engines. I emailed NGK and got an answer from them. The response is below...
Thank you for your inquiry, however we currently do not have a heat range colder replacement for this spark plug that is quite the exact fit. The original spark plug for this application uses an extended thread shell that part number LTR7IX-11 does not have. The use of the non-extended thread shell can lead to issues with deposit build up on the spark plug that can increase chances of fouling and the possibility of hot spots for pre-ignition.
Technical & Training Specialist
NGK Spark Plugs U.S.A. INC. || http://www.ngksparkplugs.com
46929 Magellan Dr. || Wixom, MI 48393
Fwiw, Amazon is not an auto parts store.Well, I wonder why Amazon sells these as direct replacements...looks like I'll be returning these plugs