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when we tested the ignition coil with the meter (1980 chevy luv 4x4 )
primary was at 1.8 (book says readings should be 1.5)
secondary was 9.17 (book says readings should be 11.5)

we are thinking the ignition coil is not creating a strong enough spark to fire up cylinder 3&4.
we can pull wire 3 from the cylinder , there's no drop in rpm and the same no drop of rpms wire 4, however we have a drop on rpms for wires 1 &2
we read a post of someone whose engine had the same symptoms and the coil was bad, they replaced it and all 4 cylinders got enough spark- problem gone. we are tying to see if my fluctuation
is the culprit.are my readings OK? or is my coil faulty?
we are planning on compression testing after the first ( however a finger in the hole of the spark plug wants to blow your finger out of it )
we believe we have the firing order correct
http://i363.photobucket.com/albums/oo71 ... G_0272.jpg
i have no steam , smoke or drips from tail pipe so i am ruling out blown head gasket.
my idle should be 950 but we are bouncing everywhere
http://youtu.be/pzgwyHxYR1U

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What part is this?
What is it for?
How Do I test it?
Where do i get a new one?
Are we there yet??

The coil readings are not too bad. If a coil is bad it wont miss fire the same 2 cylinders. When you do the compression pull all the plugs, it is possiable the head gasket is blown between the cylinders, if it is it wont blow steam.

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Certified pilots, looking down on people since 1903.

Agree with above. Fireing order is 1-3-4-2, and distributor turns counterclockwise.

It also depends if there is a dead short across either of the windings in the coil.If there is a short it can be intermittent and only cause a problem part of the time.Spend the what twelve bucks to replace the coil and see if it makes a difference or borrow one from somebody and try it.

we replaced it just to be sure. we put a MSD coil in it

_________________
What part is this?
What is it for?
How Do I test it?
Where do i get a new one?
Are we there yet??