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View Full Version : #1 cylinder not firing.....help needed


platinumhandz
05-01-2003, 07:02 PM
Ok heres the deal with this 1989 carburated Accord:

Check all vacuum lines for leaks
changed plugs.wires, cap and rotor.

the problem is that the #1 cylinder isn't firing properly, if i pull the plug wire , the engine doesn't change a bit, with the plug out of the motor with it grounded to exhaust manifold ,it has a very weak spark sometimes no spark at all.


All replys welcome............THANKS
A20A1
05-01-2003, 07:32 PM
you may want to clean the threads on in the hole for the spark plug. You may also want to add/replace your factory ground wire...

Mine is a 2 guage wire from the negative termnal... and I bolted it to the head with one of the larger bolts that was used to hold a A/C hose bracket I think.

also make sure the wires and plugs have a snug fit. Like sometimes spark plugs come with little screw on caps that come loose... or a wire end has expanded too much and is loosely touching the spark plug.
ACCORD EX
05-02-2003, 11:42 AM
diffenitly check the little cap on the spark plug it self ! , also i would take out the distributer cap and clean it or replace it !


MIKE
platinumhandz
05-02-2003, 12:06 PM
plug ends are all tight and the distributor cap is new
DanG86LX
05-03-2003, 07:51 AM
Wire resistance < 25kohms ?
platinumhandz
05-03-2003, 08:14 AM
Its not the wires either, i even swap the wires around and it still has the problem on the #1 cylinder
ACCORD EX
05-03-2003, 11:13 PM
so i don't get it ! every thing fine in the spark as you said ! and the cylinder is not firing ???????? you said you changed the rotor right ! i would check the igniter ! and then teh coompression in that cylinder !

MIKE
platinumhandz
05-07-2003, 10:58 PM
Ran a compression test and the #1 cylinder couldn't even get 10psi.............What do you think? bent valves?
ACCORD EX
05-07-2003, 11:34 PM
10 PSI ? damn ! that means it's fully not functioning ! though don't know much about what the results mean !

MIKE
A20A1
05-07-2003, 11:49 PM
You could probably plug the pcv vacuum port on the intake manifold and remove the pcv valve then see if there is a lot of blow-by coming out of the PCV valve port.

Not sure if thats a good Idea though.