Need some help here... I read the writeup, I believe I have this setup correctly, but she bucks like it's getting too much fuel, and idles like isht.
bounces from 900-1300rpm.

Any clues?

 

sup man.. i have the same problems but im running dsm 390cc .. do u have the sensor type IN 06 out 06 and if running the vafc hack throttle %'s should be . low98% hi 99%

 

Sounds like your RICH, what's your 1K RPM Fuel setting at? Start from 40% and work your way up, 35, 30%, etc.
Also, what's your FUEL pressure at the rail?

 

Pressure @ rail (from guage) is 52psi. I cannot get it any lower, since the install of my Walbro 255. I am set at 71%/72% throttle. I am -45 for 1000rpm, then -35, -35, -35, -40, -40, -40, -40. For both low and high.

 

Try -50% at 1K RPM.

If that doesn't work, your going to have to lower that rail pressure- 450's at 52psi is dumping too much FUEL. Try doing the "Drill holes in your FPR" trick.

 

What is this drilling holes trick?
Is there a write up on it somewhere or can you explain to me how I do it?

 

CLICK HERE

 

You rock, will be trying this tomorrow.