Question on satisfactory spark plug cables for 3.5L

Discussion in 'General Motoring' started by Ed Tee, Jul 30, 2003.

  1. Ed Tee

    Ed Tee Guest

    I have a rough idle on 96 Intripid with 3.5L and I want to change my spark plug
    wires. I checked on prices and found the following:

    Napa $50
    Autozone Bosh $80 and Double Silicone $60
    Belden $55
    MoPar $90

    I have read here that MoPar cables are problem prone.

    Any body have good results with any of these listed.

    Thanks, Ed Tee
    Ed Tee, Jul 30, 2003
  2. Ed Tee

    Mike Behnke Guest

    Have had good luck with AC-Delco wires. Lifetime warranty and around
    $40. 50K and no problems. Easy to install. Wipe off the coil pack
    terminals with a clean rag and remember to apply the silicone grease to
    the inside of the boots at both ends of the cables.

    The first generation LH cars with the 3.5L have a tendency to develop
    intake manifold gasket leaks which can also present as a rough idle
    and/or misfires. Listen for a hissing sound at idle with the the hood

    Good idea to also clean the internal surfaces of the throttle body with
    solvent and a toothbrush. Buildup at the trailing edge of the butterfly
    valve will also cause rough idle. Can be done without removing the
    throttle body from the engine. Just remove the flex host at the inlet

    Mike Behnke, Jul 30, 2003
  3. Ed Tee

    Alex Guest

    I used to fix a "rough idle" on my Intrepid 95/3.5L with $3 fuel injector
    cleaner. Works for me. 170k miles on original wires do not have any reason
    to replace them yet...

    Alex, Jul 30, 2003
  4. Ed Tee

    Neil Nelson Guest

    The NAPA (Belden) wires will work fine.

    As Mike said, your rough idle is liable to be a vacuum leak
    between the lower intake and the cylinder head, usually
    cylinder #5.
    Neil Nelson, Jul 30, 2003
  5. Ed Tee

    Steve Guest

    I've had decent luck with Beldens from NAPA, ROTTEN luck with the crap
    Autozone sells, and right now I'm running a set of AC/Delco wires that
    look every bit as good as the Beldens.
    Steve, Jul 30, 2003
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