Thatoneguyyouknow98

Hey guys, this question has probably been asked a million times, but I was wondering if i could get a 2nd opinion. Back when i first got my truck(2000 F150 w/ 4.2 V6) in March or so, it had the iconic pcv leak under the intake. I fixed that problem a while ago, but before i did it was badly mis-firing and dieing at idle. I was wondering if my cats are messed up because of it, because when I took the muffler off to replace it there was black soot piled up in it. After putting a glasspack on it, I regained some power but i'm seeing black soot shoot out of it(enough to make my chrome tip black). If anyone could shed somelight that would be greatly appreciated.

white89gt

If I had to guess, you are burning oil by your description.

Did you put a Motorcraft PCV valve in it? Off brands let oil by, and will make the motor blow smoke.

Thatoneguyyouknow98

it still has the stock valve in it, the only valve I've replaced is the EGR valve.

white89gt

Does it rattle OK? Possibly stuck open?

They are about 20-25 dollars on Amazon for a Motorcraft with a new tube. Might be worth getting a new one to you?

white89gt

Here's a linky:

Thatoneguyyouknow98

I just took my truck on a 165 mile trip, and it felt like the longer I drove it the less power I had. Then after letting it sit for 30 min I started up to drive it again and it felt like the tranny was lurching, but i think it was a small miss-fire in one of the cylinders. But I still went 165miles on half a tank.