I've finally got the EA71 running perfect, so I thought. I had a loss of power while the engine had a load on it. Anyway, the no 2 cylinder isn't firing.

 

Well, when I took the spark plug wire off of the no. 2, nothing happened, no rpm change at all. When I put it back on, the engine started to rev up, but with the no. 2 wire all the way in the cap, nothing. I switched wires around, thinking that it's the wire, but still on the no. 2.

 

So, if I put the wire just above the cap, so that it will arc, the no. 2 starts firing. I changed the cap, rotor, and the plugs for good measure, but still, same thing. Wont run if plugged in properly, will run if it arcs from the wire to the cap.

 

The engine came out of a brat, and had a hitachi carb. No points in the distributer, and it has an ignition module atached to the coil. I am just guessing that this is an engine from a 1980 brat. I could be wrong though and I may not be buying the correct distributer cap.

 

Anybody got any ideas on what could cause just one cylinder to do this wonderous event? It certainly doesn't make sense, but I swear that I'm not making this up.

Test your coil just for giggles.

 

GD

Actually,it does make sense.I`ve seen similar scenarios a few times.Normally it is a car that won`t fire at all.Loosen the coil wire until there is a gap and VROOM!

 

Forcing the spark to jump the gap increases the voltage delivered to the plug enabling it to fire.

 

At one time,I ran Champion plugs that had an extra gap built in.

 

I`d check the plug.

 

For a more technical explanation:http://members.iinet.net.au/~pauldawson/technology/iame26-spark-plugs.PDF

That is very interesting information. Here I thought that I might need to buy a new distributer. I'll replace the plugs today and see if thats whats causing my problems. From what I'm reading, it makes perfect sense.

 

I never would have thought that the gap increses voltage to the plug. Crazy how those guys would cut the wire and put a button in the line to create a gap to increse the voltage to the plug. Really neat stuff!!! Thanks.