Pulled the plug wires one by one until the idle sound changed, well, in this case, until the idle sound DIDN'T change.
Cylinder #4 not firing.
Got plenty of spark, could hear that as clear as day.
Spark plug was dry and a whiteish color.
Couldn't hear the injector click using a poor mans stethoscope (long handled screwdriver).
Dug out the Helms, took a while to figure out the connectors and the naming convention, but the end results was:
Cyl-
Ohms
1 - 13.9
2 - 16.3
3 - 15.6
4 - 4.5
5 - 16.4
6 - 16.3
7 - 16.3
8 - 16.4
Plenum pull here I come.
Anybody got any spare '90 primary fuel injectors lying around? I don't want to empty the savings account right now, me & wifey's anniversary is right around the corner and I'd be in big trouble if I blew a kilobuck on injectors right now.
TomC
'90ZR1 #792