Eric;

Swap 3 & 4 spark plug wires then repeat your test. If #3 now has no effect on rpm the wires are bad. If no change, swap the injector plugs (they all fire at the same time) and repeat your test.
Good Luck and let me know.
Ken Lewis

________________________________________________________________
Sign Up for Juno Platinum Internet Access Today
Only $9.95 per month!
Visit www.juno.com