FireRed04Vert said:...snip... It's from heat soak of the fuel in the rail...it actually tries to boil the gas. ...snip...
postban said:Can't be the only reason......heat? (questioning, not stating with any certainty)
Mine does it when cruising too, like when you are just doing about 2k rpms and you just need to accelerate a little, it will stumble slightly on tip-in.
My rails are like twice the volume of the stock ones so your heat theory would have me heating twice as much fuel to boiling. :shrug:
And that fuel is coming from a -8 line too.
I am going through this right now too. Last night my tuner moved my "closed loop switchover rpm" down and threw a bunch of fuel in at lower rpms and it reduced the stumble by about 50%. Theory is my cams are causing it, some vaccuum reading is off because of that, compensate as described, symptoms decrease.
Car works perfectly on the dyno, try power shifting or just shifting quick and it bogs too. Going to get an "on-the-road" wideband tune by Alternative, hope that does it.