When using my timing light on one of my leading plug wires, I see an intermittent miss and certianly feel it when driving the car. Since the leading plugs fire at the same time, would it be possible to switch the leading plug wires and see if the miss follows the coil or the plug wire/spark plug. I have an E6K on an 87' T2. I have narrowed this down to the coils, plug/plug wire combination, or possibly trigger event. Any other suggestions would be appreciated. I have eliminated the Haltech as a source of the problem.

Symptoms include an intermittent fluctuation of the A/F ratio at steady cruise, rev limiting, and low boost. Car will, at times, surge during acceleration. We it does run correctly, A/F ratios are in line. and the car runs smooth.

Fuel pressure is stable.

Help.

 

you can switch the leading plug wires without any problems. I would check the plugs(likely fouled)

 

timing is zero'd right ?

 

Yep. Did this again just to confirm timing was not a problem.

New plugs have improved the problem but no removed it. Since it is intermittant, I doubt plugs can be fouled part of the time and part of the time be fine. Could be wrong on that.

I keep getting a reading on my timing light that the second leading coil does not light at the timing mark. Or occasionally it does. I understand that is more a timing light issue than the timing of the car. Anyone care to elaborate....