Re: MISSFIRE WHEN WARMED UP

Posted by JWL On 2009/6/15 14:20:15

Okay, here I go one more time (just couldn't leave it alone). If the new universal coils are marked so that the positive marked (+) terminal is for the source (switch) and the negative marked (-) terminal is for the distributor, then there is no problem regarding the vehicle's battery ground, if connections are made according to these terminal markings. If this is not the care, then we are back to trying to determine which terminal is to the primary winding.

Regarding my comments about using a meter to check for secondary output. It was a Sun Equipment instrument and I believe one knob setting was marked "Secondary Resistance". We used this setting with one of the leads on the spark plug terminal and the other on ground (vehicle ground dependent, of course) to check for faulty high tension leads (spark plug wires) with the engine running. The test could also be used for other trouble shooting purposes like coil leads hooked-up backwards.