How important is a strong ignition spark for FE

[wdb]

Originally Posted by markweatherill

Try it with the engine running. You may see a difference!

Originally Posted by Cd

How do you do that ?

Indeed! An extra spark plug perhaps.

[markweatherill]

Originally Posted by Cd

How do you do that ?

You remove one spark plug, lay it on the engine or hold it there (carefully)somehow so it has good ground connection, start the engine and run it, long enough to see what the spark is like. I'm sure there are videos on Youtube that explain it better.

Alternatively, there's a device called a Gunson Colortune, I had one years ago.

[Baltothewolf]

Close the gap on all the spark plugs by .02-.04 (depending on what stock is supposed to be). On my Fox (prior to going forced induction) I went from the .54 that was stock down to .50. It seemed to have better throttle response at higher rpm ranges. I run .34 now due to FI.

[Cd]

Originally Posted by markweatherill

You remove one spark plug, lay it on the engine or hold it there (carefully)somehow so it has good ground connection, start the engine and run it, long enough to see what the spark is like. I'm sure there are videos on Youtube that explain it better.

Alternatively, there's a device called a Gunson Colortune, I had one years ago.

I tested the spark this way, but never let the car actually run more than a second.
It shudders and kicks, and sounds awful, so I always shut it down if it does happen to start on just 3cyls.

Surely running the car on 3cyl is bad for the car !