Running rough and popping.

[Scrid]

Trying to get my 84' Fj1100 back up to par. It's been neglected for some time while my parents were failing and eventually both passing.
I would put new fuel in this girl every year and start and run it around for a few miles.
This year it started fine but after a few days lost power and started running rough like a miss.
I pulled the bowls and washed them out. They weren't really that dirty, and then blew all the passages out with compressed air. I didn't like the carb slide diaphragms as they were still original from 84' so I ordered new ones that came with the slider too.
It runs better but the popping and chuffing is still there. Runs sorta better with the choke partly on.
Compression test last night revealed 150 across the board except #3 @ 148 lbs.
I feel like this is an ignition issue. The way it came on so fast. Today I ran straight power to the coils and it made no difference at all.
I just got done testing the coils and pick up coil.
According to my OEM service manual the pick up should be near 120 ohms.
Mine read 186 ohms on the orange to black / and 184 ohms on the grey to black.
Coil specs are 2.7 ohms Primary, and 12k ohms Secondary.
for coil 1 & 4 (left side) I got 3.6 ohms pri / 36.7 k ohms secondary
coil 2 & 3 (right side ) I got 3.5 ohms pri / 34.6k ohms secondary.
I tested the secondary right at the 45 degree plug boots where the threaded plug end goes in. Book didn't say I had to remove the elbows.
Kinda looks like I need new coils? Although the pick up coil resistance seems high too.
Something else I noticed was, that with a new spark plug as a "tester" on each coil wire,...the spark when running is a very thin almost purplish color. Didn't look real threatening like most ya see where you can actually hear it and its a bright yellow thicker flash.
Thoughts?
Thank you.
Chris

[T Legg]

Even though the manual says 120 ohms for tbe pick up coils both of my 1100's read 162 ohms and run fine .

[86FJNJ]

I just started using Yamaha ring free plus fuel stabilizer in my gas and I honestly feel like the bike ran a little smoother. It can't hurt to run that in your fuel as you're trying to get the bike in order. It's expensive but only 1 ounce per 10 gallons and should help clear out some passageways.

[FJmonkey]

Did you let any gas with ethanol sit in the tank? Might be plugged idle jets.

[86FJNJ]

This

[Scrid]

I won't put e10 in anything I own.
I will look into that Yamalube additive.
Thanks for that.

[Pat Conlon]

It runs better but the popping and chuffing is still there. Runs sorta better with the choke partly on.

Hey Chris....This ^^ is your clue.
Your choke / idle circuits and pilot circuits are still dirty. Disassembly and an Ultrasound bath is the sure way to clean those small internal passages. We have all tried carb soaking and compressed air only to have to repeat the process.
That ultrasound bath is the bomb for through carb cleaning.

I feel like this is an ignition issue. The way it came on so fast.

Get the carbs sorted out first. If the bike was running fine before it was parked and now it's not, 99% of the time it's carb related....(unless you have mice)

Congrats on those Great compression numbers....those '84 FJ's are special to me....

Cheers

Pat