Greetings!

As per subject matter, I have isolated the misfire to Cylinder No.3 after a “spark” plug test. I’m getting a No Spark for that particular cylinder.

Steps taken:
1.Swapped the HT wires = no improvement.
2.Replaced the affected spark plug = no improvement.
3.Replaced contact point and condenser = no improvement.
4.Replaced ignition coil = no improvement.
5.Inspected and cleaned the distributor cap and rotor = no improvement.

The distributor is fairly new (8mos old). It was replaced, as suggested by the mechanic, because the van won’t start then.

I went to two auto shops. The first concluded that it needs a top overhaul. In the second auto shop, I request for a (dry) compression test and the results for all cylinders are okay. (No wet compression test was made.) But the second shop also concluded a top overhaul is needed.

I got confused so I did some research and the reasons for misfiring:
1.Loss of Spark
2.Improper Air/Fuel ratio.
3.Loss of Compression.

If we apply the “process of elimination”, I’m still at number one. There is no spark. So why a top overhaul is needed?
I’m at loss here so can anybody provide me some advice? I live in santolan, pasig. Can any fellow tsikoteers refer me to mechanic that’s within the area?

Thanks!