The symptoms are getting worse. Bad idle and really poor slow speed acceleration including uneven hesitation.
What I know: I went to check the timing and my timing light showed sporadic RPM on #1. When I put it into 'flashing light' mode the light was very inconsistent. I figured there was a problem with the light so I revved the engine and the rpm reading and light pattern became more consistent.
I moved the induction wire for the timing light to #3 and had the same results. (So I suspected the light had an issue)
At some point I moved it to a different wire and the timing light showed fairly consistent RPM and the light blinked as you would expect. I tried several other cyl with similar 'okay' results.
I swapped out the distributor cap and it didn't have any effect.
I also swap the #2 and #1 wires and the problem stayed with #1.
I had previously pulled the spark plugs and didn't see anything wrong with #1 and #3
#8 and #7 are firing fine. (They are on either side of #1 and #3 in the firing order).
#1 and #3 are on different intake planes.
Again, the problem got worse over time. That is it would drive funny after a 20 or so mile drive. Now it seems to happen much sooner. I don't have a choke so it always runs bad cold. In the morning I will check to see if I have the same 'timing light' symptoms when it is cold.
My next step is to replace #1 and #3 plugs.
Any input?
What I know: I went to check the timing and my timing light showed sporadic RPM on #1. When I put it into 'flashing light' mode the light was very inconsistent. I figured there was a problem with the light so I revved the engine and the rpm reading and light pattern became more consistent.
I moved the induction wire for the timing light to #3 and had the same results. (So I suspected the light had an issue)
At some point I moved it to a different wire and the timing light showed fairly consistent RPM and the light blinked as you would expect. I tried several other cyl with similar 'okay' results.
I swapped out the distributor cap and it didn't have any effect.
I also swap the #2 and #1 wires and the problem stayed with #1.
I had previously pulled the spark plugs and didn't see anything wrong with #1 and #3
#8 and #7 are firing fine. (They are on either side of #1 and #3 in the firing order).
#1 and #3 are on different intake planes.
Again, the problem got worse over time. That is it would drive funny after a 20 or so mile drive. Now it seems to happen much sooner. I don't have a choke so it always runs bad cold. In the morning I will check to see if I have the same 'timing light' symptoms when it is cold.
My next step is to replace #1 and #3 plugs.
Any input?
Last edited by a moderator: