Viper, Using the timing light is one way I checked to see if I was getting any fire to the #1 plug. With the computer hooked up, NO SCAN tool attached, there was only .72V to the coil, resulting in a no spark condition and no flashing of the timing light.
With computer hooked up, scan tool hooked up, there is 12V to the coil and spark at the plug. With the tool hooked up, the engine runs like a top ... or seems to, and flashing of the timing light.
Another question, what starter solenoid is everybody using when convering to EFI? The reason I ask is I just replaced my solenoid with a stock bronco solenoid. There was a piece of paper in the box that had the following warning:
"Do not use this solenoid for vehicles fitted with an on-board computer. Use of this solenoid for such vehicles will result in permanent damage to the EEC processor. The damaged processor can cause a rough running engine or a no start condition. Vehicles with a computer require a solenoid with suppression diodes."
Have any of you noticed this (or similar) statement about the solenoid? Does it really matter? I don't remember seeing any warnings in any of the wiring installation instructions about changing the solenoid.