Well i just got my truck outta the Shop. They said the Injectors were Hanging up and they cleaned them and now it runs fine.. Now the to the light My check engine light is On they said it was the back 02 Senser and the driverside i have the back Cats cut off.... anyone know anything about this someone said there could be a leak i don't know a thing about it......

 

First and formost , what was the code ? PO420 or PO430 maybe ? Need to know that ..

BTW - That "someone" is jbrew.

 

they didn't tell me a Code they told it was the Downstream 02 Senser on the Drivers side if that helps?

 

Hell I didn't know you started that other thread - Here I thought we were stealing it

Anyway, I'll guess that's what they scanned (420/430) . I copied from my other post because this is what you need to figure out -


"It's simple - You have a leak, that's all there is to it. Once you off the rears it can't leak in the Y before the rear sensor. It's either the manifold, EGR tube, O2 Bungs or your connections.

Somethings leaking.

Running just forwards or pre-cats is still within margins of your systems programed parameters. But you are pushing it to one side of set parameters without rears. See what I'm saying ? That's why it needs to be tight".



BTW- the sensor isn't at fault - it's doing it's job and reporting a problem..

 

Well i kinda dont know where most of that stuff is..... i need to go buy a book or something

 

That's alright, yea a Chiltons or Haynes manual will help you quite a bit with things. Probably not to much in this case tho :lol :..

I'll put it another way - What ever you messed with under there is what you need to check. Quickest way I check for leaks in the exhaust is to stick an air hose into the tail pipe and regulate 10 -15 lbs thru it. Then hit the joint using a squirt bottle with mostly water and a little dish soap mixed. You'll see every leak in the system that way. Some people use shop vacs in blower mode as well..

 

So imma Say Check everything on the drivers side make sure theres no cracks n Such? I may do this this friday.... it may have to go back to the shop anyways there STILL a Small Missfire even after they Cleaned the Injectors.... But its not as bad... so am i going in the right Direction? with the Injectors?

 

Well i just got back from Ford and they showed me what the 02 Sensers where doing and it turns out the Passenger side front 02 Senser is bad... i looked under the truck to see how easy changing it myself would be and It looks hard.... has anyone ever changed this 02 Senser Before? and would be able to give me some info on the best way

Thanks