bjackds

i am getting fuel in the exhaust which is leaking below the catalytic before the back o2 sensor on the passenger side. the exhaust is white and smells like fuel. i have replaced the ingnition coil packs, distributor caps, rotor caps, wires and the no.6 cylinder fuel injector. no. 6 cylinder is flooding the spark plug. i also have p0306 code. i am thinking valve problem. any suggestions are greatly appreciated.

steve2006

I would be surprised if it is actually fuel as it would have either burnt or evaporated before it reached the cat.
P0306 points to a misfire on No.6.
A compression test would be useful or better still a cylinder leak down test.

timmy0tool

iTrader: (7)

you replaced all that but did you replace the sparkplugs? bad plugs will cause misfires.

Dtwillis5

It could be a bad o2 sensor. When they bad they dump a lot of fuel

LScowboyLS

when you replaced the coil packs, distributor caps, rotor caps, wires, did you use all genuine NipponDenso (Toyota OEM) parts or some crap from the local auto parts store? (one exception, NGK wires are also fine)

bjackds

hey guys, i have determined that i am getting water in the no. 6 cylinder (white smoke) and unburnt fuel (smell). the compression results were 150,150,70,172,160,170,140 and 150 psi. this baby has 270,000 miles and it appears it is time to remove the heads for a closer inspection. more update to come as i move forward. even after adding oil i could get the lowest cylinder above 70 psi. the minimum is 142 psi, standard is 178 psi or more, difference between cylinders 14 psi or less.