Originally Posted by rcdoeshair (Post 670446)

Not sure if this changes anything but the part that's circled, (this is a Google pic as it's dark here, but mine is not connected to anything. I believe it's supposed to go to the SAI canister?? I found the hard plastic line that comes from the canister and I believe is supposed to hook up to this valve, but it wasn't connected to anything .when I hooked it up to this valve, the engine ran like ****! The idle speed was low .

Originally Posted by mollusc (Post 670480)

What pic are you referring to? I don't see anything in this thread that is circled. The only images are your sensor screenshots.

Originally Posted by mollusc (Post 670492)

Yes, that line is one of the ones that is supposed to go to the SAI unit. I don't remember which end of the unit it goes to.
On my older truck that doesn't have SAI, that port is simply capped.

Originally Posted by Friday Night Disco (Post 670445)

Did any of the codes come back?

Originally Posted by mollusc (Post 670501)

I would be surprised if it ran worse with the hose connected, since with it unconnected you've basically got a massive vacuum leak in your intake.

Originally Posted by Extinct (Post 670441)

We need to see a graph of your oxygen sensor voltages, you need to use the graph function instead of the display function. Record a video and put it on youtube with a link to the video. Your oxygen sensor voltages should be cycling between 1 volt and zero volts - the display that you posted shows only .1 volts. If it only ever reads that you likely have bad oxygen sensors - they read close to zero when they go bad. the sensor shoudl read 1 volt on cold startup, then start cycling after a few minutes. zero volts or .1 volts indicates a full lean condition, that would cause your fuel trims to go full rich.