ignition firing issue

[jroadstar]

Has anyone ran across this issue ?
The runs great but yet I can pull 3 wires loose at the distributor cap and it makes no difference the engine doesn't try to die or stumble I've never seen this before, but the exhaust on the passenger side sounds weird from the tail pipe either way wires on our off the cap.
69 super bee 383 4 barrel electronic ignition.

 

[440roadrunner]

You should NEVER EVER pull wires loose and leave them "open," WHY?

Because even on a breaker points system, the spark will "crossfire" to other cylinders, and may "carbon track" the cap or rotor. This can even cause an arc internally in a coil and ruin the coil

But it gets WORSE on electronic systems, that is, the high voltage that results can cause a damaging pulse and ruin the ignition. If you search deep enough, you can even find this warning in service literature

HOW I DO "backyard" cylinder balance tests:

I either pull the dist boots and stick small brads down beside each wire, and ground them out with a probe, or....

Take two hands, a pair of insulated fuse pullers in one hand, and a grounded probe in the other. After loosening the wires, you can then pull each wire out, and as you get it "up and out" you can slide your grounding probe down inside that tower.

 

[jroadstar]

More info
I just did a complete tune up
Cap , rotor , wires, compression test but can't explain why the exhaust note is different from driver side tail pipe to passenger side.

 

[440roadrunner]

Maybe you crossed up some wires............

It would not be unheard of for a new wire to have been damaged or "bad."

Get your meter and check continuity (resistance)

 

[jroadstar]

It was doing it before the tune up as well

 

[440roadrunner]

Compression test

Cylinder leak down

Balance test

Go from there

 

[jroadstar]

Compression test results show the cylinders are within 5 lbs of each other.
Bad distributor maybe ?

 

[jroadstar]

Bump
Still need some advice.

 

[coloradodave]

Do you have a 'crossover' pipe in your system or are the exhaust pipes completely independent? If completely independent, as far as the exhaust note being different, it could be the routing or even a difference in the muffler baffling. If you have stock manifolds, did you check the heat riser's operation? At any rate, if the exhaust pulses feel the same at the tailpipe tips I wouldn't worry about it.

 

[440roadrunner]

Bump
Still need some advice.

What have you done since the last go round? What do the plugs look like?

 

[Yatzee]

My 383 with a TTI system front to back puts out more vapor on one side than the other. Sounds the same and ignition pulses are the same on either side. I chalk it up to the exhaust system condensing more liquid on one side than the other until it's warmed up. Probably due to the cross-over and a slight difference in height of the pipes side to side.

 

[440roadrunner]

..........or in short, the heat riser butterfly.

 

[Hemi Rebel]

Is it any three wires, or three specific wires that you pull? What cylinders are they?

 

[Bigal75]

What do the plugs look like?

 

[jroadstar]

3 of the 4 on the passenger side if I pull them off it makes no change in how the engine runs, I can even pull all 3 at the same time and it makes no difference.
I just put a new set of plugs ,cap and rotor and wires.
I thought this would fix it as it was doing it before I did the tune up.
But it runs like a scalded *** ape anyway it'll smoke the tires at the hit of the throttle.

 

[Hemi Rebel]

Then i would say those cylinders are not doing anything. I would start with a compression test. Based on those results i would determiney next move.

 

[bigmanjbmopar]

Did you take a spark plug put it in the wire and hold it near the block or ground source while cranking the motor to see if you are even getting a spark

 

[jimt1971rr]

Have you cleaned your idle jets on your carb. It may be possible that only one side of the carb is giving fuel during idle and that could the causing a problem.

 

[jroadstar]

Well I rebuilt the carb but could be that is junk at this point