new tip in stumble


trying to get it like you
can a o2 or fuel filter cause this stumble, went out the other night and hammered the car a little, zero knock sunning great, developed a tip in low throttle stumble, replace plugs and tried the module and coil off dads car, was still there.... have faily new denso, 02 put have run a few gallons of 110 through it at the track mixed with 93, can this cause this? ill try new 02 and change the fuel filter...


Active Member
Bad O2 can cause this. Also check the vortex buick website, I believe it has all the correct settings for IAC, TPS, and other things that can cause problems.