[img]smileys/smiley5.gif[/img]have
grand national that has had crank sensor, fuel pressure reg, tps,
upgraded ignition modual, & coil pack, wires & plug replaced.
wave formed injectors, primary & secondary spark crank sensor. set
timing on cam sensor, fuel pressure leak down test ohm out all
injectors inspected all wiring connector. still have excessive black
smoke, missing at any trottle setting above quarter. spark plugs are
black from over fueling. Has anybody had this proublem, or any ideas?[img]smileys/smiley5.gif[/img]</span></span></font>