Sr22det running on 3 cylinders please help

[Street_Science]

Ok So I have a 1993 sr hatch.....

The thing is only running on 3 cylinders wtf?....Well was running as it will not run , and is currently a crank no start condition... Occasionally I will notice a bump in compression and it will run on three cylinders, idle at 2,200 rpms and sound like a wrx lol...

Cylinder number 4 towards the bulkhead has zero ignition pulse....I tested the other three cylinders and have spark...
I resistance tested all four of the coils and they are all within .5 ohms of each other....
I also went as far as swapping a known good coil, and still nothing....

I need to know if the coils is ground controlld thru the ecu as I predict.....

Wondering at the connector with koeo what I should have for readings with my dmm...

I was told from the previous owner that it needs a cam angle sensor ....

Any help will Be great thanx Andrew.....

But found it strange to find that cyl 4 has 0 ign pulse,whereas the three cylinders do...

Now I also have a total of three ecus, which two are labeled "62", and the third reads "63"...IIrc 63 is for an auto sr s14 blacktop.... I currently believe to have a blacktop s14 sr .....

What are the specs for the coils, cas, and voltage at the coil connectors?......

[Infinitiguy19]

Any Check Engine Light codes?

Replaced the Crank Angle Sensor and see what happens.

[240_SeX]

I had the same problem (only on cyl 3) i had a broken wire to the ignitor. i'd check your wiring and then try a known good ignitor as it is the most likely issue. A CAS would be much more likely to cause a timing issue to all 4 cyls, but it wouldnt hurt to swap one with a friend to see.

[Klits562]

CAS might be causing your no start problem
check the wiring and how are your packs n plugs? If its only one cyl id imagen its either wiring/ground, the pack/plug, or something with the ecu