dp1600

dp1600 · Post by **dp1600** » Thu May 09, 2002 9:42 am

If 3and4 Are not firing with spark present what is the most likly cause? Will pull engine 5-11 unless someone can give me an ansewer before that dose not require pulling it.

mharney · Post by **mharney** » Thu May 09, 2002 10:48 am

Fuel problems, compression problems come to mind.

What have you checked and how?

LeeM · Post by **LeeM** » Thu May 09, 2002 7:08 pm

You may have accidentally transposed the HT leads for 3 & 4, (most likely to happen at the distributor end, but still possible at the plugs themselves).

Also, on a twin port engine, it is quite possible there is a leak at the rubber boot that joins the pieces of the inlet manifold. This could cause a very weak mixture, and hence no firing.

Before removing the engine, as mharney says above, check the compressions, if they are OK there is unlikely to be anything gained by removing the engine.