Results 1 to 4 of 4

Thread: Just changed plugs to Bosch FR-7-LDC+ and now have occasional misfire at idle?

  1. #1
    Join Date
    Dec 2005
    Location
    Reno, NV
    Posts
    467
    My Cars
    01' M3, X5 4.4, 530i

    Just changed plugs to Bosch FR-7-LDC+ and now have occasional misfire at idle?

    Should I swamp back to my old plugs? I don't recall which Bosch plugs they were, but they were a FR7 somthing and had a green stripe. Is there anything reason a change would cause this? Also I used anti-sieze, is this a problem for conductivity?

  2. #2
    Join Date
    Oct 2003
    Location
    Jackson, MS
    Posts
    903
    My Cars
    2002 525i Sport/5
    Go with the OE F7 LDCR and you should not have this problem. My car seems to to like the OE Bosch and this was apparent when I removed the 8K mile NGK's. They read good, but they just don't seem to fire as good as the OE Bosch. Also, I would not recommend using anti-sieze on the plug threads - just use a little bit of regular motor oil.

    Also, did you torque the plugs to spec?

  3. #3
    Join Date
    Dec 2005
    Location
    Reno, NV
    Posts
    467
    My Cars
    01' M3, X5 4.4, 530i
    Thanks for the info, I'll swap my old ones back in. I torqued them to 21 FT/LBS and unfortunately used anti-seize. Is there a good way to remove the anti-seize?

  4. #4
    Join Date
    Jun 2005
    Location
    Nor^Cal
    Posts
    3,624
    My Cars
    95 Avus Blue M3///96 Boston Green 328i
    They make conductive anti-sieze for applications like spark plugs and the resistor boots (stops them from sticking on plugs).
    ----Dave----

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •