I've got a 99 windstar with just over 100,000 miles, for some time now its
made a noise at certain driving conditions that i always thought was a
rattling heat shield but my dad said it sounded like an octane ping.
I'm pretty sure its an octane ping now because i recently got back from some
very hilly driving in upstate NY where it tested it out. 87 octane, A/C on,
going up hill, rattle/pinged like crazy, 89 octance not a sound, or at least
to faint for me to pick up.
Any idea what might cause it since ford calls for the 87? heres the list of
what I've done since buying the van thats fuel/air/ignition related.
fuel filter 5/28/2003 70350
clean IAC 11/2/2003 76350
clean throttle body 11/2/2003 76350
plugs and wires 2/4/2004 78103
air filter 9/10/2004 83600
fuel filter 12/21/2004 84800
TSB 03-16-1 4/14/2005 87962 < thats the one that keeps oil out of the intake