Mag drop

Re: Mag drop

by Garrett Wysocki » 6 years ago

Garrett Wysocki

1 572 1.45k

Make sure you did not get heat transfer compound on the electrodes of one or more of the plugs, all plug caps are pushed on all the way to the plug, including the wires in in the coil packs. Also try trimming 3/8" off each end of plug wire at coil pack and plug cap reinstall with dielectric grease. Verify ignition ground on the ignition modules and coil packs.

Re: Mag drop

by Bill Nelson » 6 years ago

Bill Nelson

6 10 0

Checked plugs. They all looked good. Switched bottom to top. Restarted and found everything the same. Same mag dropping 500-600, other still 10-30.

Re: Mag drop

by Garrett Wysocki » 6 years ago

Garrett Wysocki

1 572 1.45k

You can swap the ignition modules and the take a meter and verify the grounds, check for broken wire under insulation near connectors. Verify the resistance from plug cap to plug cap I forget what the value is but if you notice one plug cap goes to the plug wire then to the coil and back out of the coil to another wire and plug cap. The total resistance of all 4 of each of these circuits should match. Or just individually measure the resistance of the parts and look for a discrepancy by comparing.

Re: Mag drop

by Tim Treat » 6 years ago

Tim Treat

0 10 0

"checked plugs" means what? They all appear to be firing? I would put old plugs back in the bad mag side. One of your new plugs is probably bad.

Re: Mag drop

by Bill Nelson » 6 years ago

Bill Nelson

6 10 0

Reversed mag check p-leads on test switch. 500 rpm circuit drop reversed as well. Checked resistance from cap, across coil and wires to opposite cap. All 4 circuits measured same resistance, so coils, spark plug wires, and caps should be good. Now, maybe a very expensive module to replace, or first replace inexpensive plugs. Will try that tomorrow. If that doesn't work will call Lockwood onMonday. Does anyone have any other ideas?