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Ed Wright · 04-02-2011, 10:33 PM

Joe, the pulse does narrow, but I'm not sure if it's the cause or effect from the RPM drop. Usually happens about 4900, drops to anywhere from 3900 to 3200, then right back up. Has an MSD crank trigger, no cam sensor. Replaced the crank trigger, MSD 7AL2Plus box, batteries, trans brake solenoid, micro switch on the Biondo Terminator, and the FAST XFI ECU, and TPS. I tugged on, wiggled, & flexed the wiring & battery cables. Only things I can think of are the ignition coil and battery cut-off. I have thumped on the cut-off and tugged on the cables, all while the engine was running. Couldn't make it miss. The TPS graph had gotten a bit eratic, new fixed that but had no effect on the running. I'm about ready to burn it. LOL

Today I replaced the ignition switch and wiring to the ECU and MSD box.

04-02-2011, 10:33 PM	#34
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Help!! Joe, the pulse does narrow, but I'm not sure if it's the cause or effect from the RPM drop. Usually happens about 4900, drops to anywhere from 3900 to 3200, then right back up. Has an MSD crank trigger, no cam sensor. Replaced the crank trigger, MSD 7AL2Plus box, batteries, trans brake solenoid, micro switch on the Biondo Terminator, and the FAST XFI ECU, and TPS. I tugged on, wiggled, & flexed the wiring & battery cables. Only things I can think of are the ignition coil and battery cut-off. I have thumped on the cut-off and tugged on the cables, all while the engine was running. Couldn't make it miss. The TPS graph had gotten a bit eratic, new fixed that but had no effect on the running. I'm about ready to burn it. LOL Today I replaced the ignition switch and wiring to the ECU and MSD box. __________________ Ed Wright 4156 SS/JA