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Re: missin
Been a while since I was diagnosing things, but a couple of suggestions:
Figue out if the miss is a particular cylinder, or if is misses due to a fuel problem that could hit any cylinder (with TBI, this is MPFI, right?). What kind of ignition on it? Coil over plug, or does it have wires? If wires you can pull the boots with insulated pliers (special spark plug boot tool) and when you get the bad one the RPM won't change when you disconnect it. Then check to be sure it is sparking, and look closely at the plug for cracks, burnt electrode, buildup, etc.
I would also check the fuel pressure, low pressure will make it miss. HTH
Rob
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1999 F250 V10 XLT 4X4 Silver Super Cab Shorty. 6" Skyjacker, Dual Nitro shocks, 37" PJ Dirt Grips on Eagles, Rancho SS, Smittybuilt Nerf bars, Privacy Tint, Catch All floormats, HFFTTT Mirrors, Stull Grill, CL's, Blaupunkt and Pioneer, quad-gauges, CB.
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