Help

[2000f150]

okay this has part to do with the mil eliminator thread,i got this problem with my truck and i've been trying to fix it for a while know. when it is idleing it feels like the motor is missing (shakeing) the mirrors even viberate not only that it has this inconsistent pop noise coming from the air filter, a year ago i brought it to the local ford dealer and got it looked at they said that it was missing under load at idle i also got the code lean on bank 2 well that was then and so know i brought it to a local garage and he came to the conclusion that my cat. was plugged cause there was little exaust coming out the tail and the popping he thought was the valves(make sense) so the other day i went under the truck and cut all the cats. and know i got a 1944 grain truck ok maybe not but it sounds like one,has anybody got any info or suggestions i've changed coils,plugs,

[fordtough.ca]

What is the milage on your truck, and yes plugs and fuel filter should be the thing you should change first
Is your engine throwing any codes after you cut your cats out

[f150phule]

I've read in other forums where sometimes a vaccuum leak can cause lean codes to show up. Check all the vaccuum hoses for holes or cracks. Some will be hard to reach. I've heard of some guys using carb cleaner and spraying it on the vaccuum hoses and if the rpms go up then you found the leak.

[fordtough.ca]

You can also use a propane bottle, one of those small canadian tire torches open it slightly (don't light it up) and see if RPMs change as you go around vacuum hoses

[2000f150]

i've done the the vacum leak chek the guy at the garage used brake cleaner and yes my truck is showing 4 codes p0136,p0141,p0156,p0161 i think they are all related to the o2 sensors though which i anticipated the fuel filter was also changed.

[Blown F-150]

Have a good look at the large 90 degree Vacuum line attached to the back of the upper intake behind the throttle body, they often crack and are difficult to have a good look at because the firewall is so close. Your issue could be caused by a bad O2 sensor,If you replace your O2's use only Bosch or OEM (which are Bosch). I tried the NAPA NGK brand and immediatly lost 4 MPG. went and bought Bosch sensors and my mileage came back. make sure you disconnect the battery for at least 15 minutes after you swap sensors.

[John McKey]

I chased a similar problem with mine. I changed the Upstream O2 sensors and it ran great afterwards.

[shelbyx1]

silly question with the codes you have have you cleaned the maf sensor,they will get contaminated with debris causing incorrect readings just use a quality air intake cleaning spray.