RESOLVED: 3 weeks troubleshooting, still stuck

[Valaas]

did you spray starter fluid or propane around the base of the throttle bodies to test the base mounting yes or no?
did you unplug the connector on the map sensor to see if that would help yes or no?
did you take a vacuum pump and hook it to the map sensor and pump it to 18 inches of vacuum to see if that works yes or no?
maybe you just like working on the bike

Good vacuum readings on all 3 TB's. No leak between the head and the 4-way connector. But yes, I have sprayed starter gas both in and around the TB's.
The MAP sensor is not fed any vacuum, I have measured. Near zero vacuum in the hose feeding the MAP sensor.
And there is the problem.
That, and perhaps a problem with ignition on cylinders 2 & 3

If I didn't like working on the bike I would have replaced it with a 2020+ R3

 

[TURBO200R4]

Good vacuum readings on all 3 TB's. No leak between the head and the 4-way connector. But yes, I have sprayed starter gas both in and around the TB's.
The MAP sensor is not fed any vacuum, I have measured. Near zero vacuum in the hose feeding the MAP sensor.
And there is the problem.
That, and perhaps a problem with ignition on cylinders 2 & 3

If I didn't like working on the bike I would have replaced it with a 2020+ R3

i have been working with vacuum since 1966 and in the early 60's to 90's they used vacuum modulators on a lot of transmissions so i was constantly checking vacuum on these vehicles. i would check the vacuum canisters and a lot of vacuum hoses especially the vacuum modulators witch controls firmness and timing of the shifts. on chevys the vacuum advance can go above the throttle plate or below the throttle depending on the eternal spring and you have to know witch carb tube to put the hose on and you do that with a vacuum pump. very few mechanics knows this and that is why i consider myself and expert on this.
so what you are saying about the vacuum is impossible unless
you have cracked hoses or hoses clasping
you have a cracked tee
you have a map sensor that leak's like a bear
or you have a tee that is blocked or sealed up with epoxy from trying to fix a leak
or we just have a failure to communicate
the key word is hand held vacuum pump.

 

[stingray]

i have been working with vacuum since 1966 and in the early 60's to 90's they used vacuum modulators on a lot of transmissions so i was constantly checking vacuum on these vehicles. i would check the vacuum canisters and a lot of vacuum hoses especially the vacuum modulators witch controls firmness and timing of the shifts. on chevys the vacuum advance can go above the throttle plate or below the throttle depending on the eternal spring and you have to know witch carb tube to put the hose on and you do that with a vacuum pump. very few mechanics knows this and that is why i consider myself and expert on this.
so what you are saying about the vacuum is impossible unless
you have cracked hoses or hoses clasping
you have a cracked tee
you have a map sensor that leak's like a bear
or you have a tee that is blocked or sealed up with epoxy from trying to fix a leak
or we just have a failure to communicate
the key word is hand held vacuum pump.

add cheap chinese collapsible hose to the list.

Pressure testing vacuum lines is a waste of time. use the vacuum pump. I think his homemade rigging is out of sync. too much cheap hose losing his vacuum to the sensor so far away. or a bad manifold absolute pressure sensor. sucks to be so deep into it replacing everything. try this...

 

[Valaas]

I finally got the fresh from factory HT Lead kit. Fitted with new coils.

The old beast never was very keen on starting at 0 degrees Celcius ambient and near 100% humidity, as were the condidions today. And nothing of the 1000's worth of hardware I have thrown at it over the last months have made any difference whatsoever. That means I had no problems curbing my enthusiasm when I pushed the starter button.
But I 'll be ****ed if it didn't start immediately and ran perfectly.

The problem was somewhere between the low current coil signals and the sparks.

The never before seen smooth engine running and cold start must be the result of new oe vacuum gear.

Onwards with the turbo project - happy days!

 

[Valaas]

The incredible response and support I received during this ordeal speaks volumes. Giving up has never been an alternativ, but you fellows made the process a hell of a lot less frustrating.
I feel priviliged to be part of this community.
Thanks.

PS! I will be even more of a pain when I get further into the turbo build.