Autolite HT1.... FAILED....
01-02-2010, 06:32 PM
#1
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Join Date: Dec 2007
Location: CA
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Autolite HT1.... FAILED....
So at 45k I replaced my plugs, went with the Autolute HT1's. I made the sad assumption that they would be better than the Motorcraft SP-462's. Boy was I wrong, they are actually the same crap (both made by Federal Mogul), anyone running a decent "tune," you may have the same issue with these plugs. Engine developed a misfire at idle, and at cruisin speeds in 2nd-4th gear, this was at 54k. I pulled the plugs last night and was not happy. The "finewire" at the end of the electrode was burnt off on 6 of 8 plugs, and one plug, too say the least was destroyed. I am surprised my engine was not damaged and did not fail. Did a compression check, leak down check and all was gravy. I am dumpin in some Champion 7989's, they are a one peice design and hope this does not happen again. Check the pic, left one is the done in Autolite HT1, the middle is the Motorcraft SP462 (notice the same flawed design) and the right is the Champion 7989. CHECK IT!!!
Last edited by wilkinda; 01-02-2010 at 07:57 PM. Reason: Edited for champion plug position
01-02-2010, 08:19 PM
#7
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01-02-2010, 08:39 PM
#9
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Champions or Brisk Racing, those are the only two I know of that are a one piece design and can actually hold up to performance.... The Champions and Brisk's have a much thicker lower barrel around the porcelain than the Autolites or Motorcraps....