Engine trouble

[PaulClaesson]

Hello,
My 944 S2 model 89 are running only in 3 cylinders. Cylinder one is not working
Compression is ok.
Spark is ok
Fuel is coming.
Nozzles are working.
Only differens I can find is the resistans between ballast resistans red cable
and point 1 at socket for the nozzles.
For cylinder 2-4 is the resistans 2M ohm, but cylinder 1 have only 23 k ohm.
Can that be the problem?
Is there anyone who can help me?

[944 Ecology]

Bad #1 injector...

[Fast Freddy 944]

Air, spark, fuel, compression....

[walfreyydo]

-Try switching spark plug wires with another cylinder and see if the misfire continues on cylinder 1.

- check spark plugs on cylinder 1 or switch with different cylinder

- check injector on cylinder one (as others have said) or swap injector to other cylinder, see if misfire follows to that cylinder

[Chalt]

My '86 944 NA was acting like it had a dead #1 cylinder. I had good compression, verified spark, verified fuel delivery, but it was missing like it was running on 3 cylinders. Used infrared heat gun on each of the 4 exhaust manifold pipes, and cylinder #1 was not cold, but it was a few hundred degrees cooler than #2,3, and 4 with the engine running.

Bought an inexpensive boroscope camera and looked in each cylinder through spark plug hole. Cylinder #1 had some coolant in there. That's why it was running rough (and cooler) on #1 -- blown head gasket and leaking coolant into the combustion chamber. There was also a tiny amount of coolant in #2, but none in 3 and #4, so my head gasket was beginning to fail.