Lean idle issue.

T2 omni, Goes way lean at idle with a slight misfire when it does it. Haven't drove the car to see if its lean at wot yet, just got the car finished and have no registration on it. I changed map sensor, and i changed the oxygen sensor today and it seem to get a little better. Sometimes it idles good at like 14.7 no misfire at all then it starts going way lean. If i rev the car up it goes back down the richer side and slowly works its way back up, and the vacuum drops a little aswell. Mods are ported head, exhaust manifold, intake manifold. 3in swing valve and exhaust. glhs stage 2 lm. new walbro 255. accufab afpr set at 55psi. I took a video have a look and tell me what u think. Oh yeh dont mind my squeaky alt belt lol

https://www.youtube.com/watch?v=-5SV...ature=youtu.be

Did you figure it out yet?


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What's the fuel pressure at idle when it starts to go lean?