I just installed an A1 Cardon dist in my '87 K5 and am having a hell of time trying to get the truck to run right. I having the timing set at 0 deg (with advance unpluged), have a new cap, and rotor also. My wires, coil, and plugs are about 10k old. Heres my problem...when I first installed the dist the truck started like hell but ran good enough to get the timing set, but when I would hit the throttle the truck would stumble and jump around almost dying and then idle fine after I let go of the gas. So I figured maybe the new ignition modual was crap and I replaced it with my old one. Engine then started great, idled great, but on my test drive I noticed that it would still stumble on hard excel. I dont know what the hell it could be. I let my engine and myself cool of for awhile and started it up again, it did fine. But I noticed the idle would surge +/- 100 rpm (almost like when the AC is on). What is wrong with my truck? I cant figure it out. Please help if you have any ideas. Thanks, and sorry for the long post. /forums/images/graemlins/1zhelp.gif Oh yeah...I did reconnect the advance wire after setting the timing.