PE90/470…. I am lost…..

[Swamphoppin]

Overhaul completed. All went well. New cylinders, Dry lash set, mags rebuilt, all new paint, all seems well.
All plugs are firing, BUT cylinders 2&4 are hot and seemingly right.. #2 is about350 degrees #4 is about 250 degrees. Cylinders 1 & 3 are 90-100 degrees cold to touch.
I have only ran short time about 20-45 seconds each time about a dozen times…..
It’s shimmying and loping running real rough. Idle revs up high then drops out about to stall. When I give it gas I have to push 1/12-3/4 throttle before it Reva up then when i release it it idles high again until drops out.
Checked everything possible that I could think of.
I was told to set firing at 25 degrees…. Is that correct?

PLEASE HELP

 

[John Fenner]

Well if you were closer to Miami I'd say bring it by, unless you want to make the trip down with it I can diagnose it.

 

[Swamphoppin]

Well if you were closer to Miami I'd say bring it by, unless you want to make the trip down with it I can diagnose it.

I fixed it. It was stupid. I didn’t notice that one of the intake boots slipped off and was drawing raw unfueled air… OMG.
Runs like a sewing machine!
Hell yes. My first build in the books. Loughman lake races tomorrow!!!