Rough idle, stalling, wild STFT, p0171, 2RZ-FE and headaches

any update? @iamtheghost

 

damn ill never know now. my life is forfeit. LOL. did it fix it? did it break it? find out on the next episode of dragon ball z.......

 

have you checked the fuel pressure regulator? Pull the vacuum line off and see if there is vacuum at the line at idle.

 

Hey guys, sorry for the long-belated update.

The problem ended up being a combination of a bad catalytic converter, which I ponied the $84 to replace. On top of the that, the largest culprit was a stuck EGR valve. I tried to apply vacuum to the valve using my brake-bleeder and it would not hold vacuum from either the inlet or the outlet air lines.

I clamped off the coolant lines to the EGR valve and removed it. I placed a brass coupler between the coolant lines to allow coolant to continue flowing in its normal route unimpeded.

I took some o2 sensor plates and welded the center hole closed with several beads of flux-core and then ground down the beads to create a flat plate that would fit over the exhaust manifold EGR tube outlet and the intake manifold EGR tube inlet. I bolted the two homemade plates into place using the stock nuts and bolts. I also painted them with high-temp Rustoleum before installing them to give them a nice look and to prevent rust and oxidation since they'll be exposed to some pretty high temps at load/operating temp.

After removing the EGR and replacing the catalytic converter, the code went away. The truck no longer stalls and it now idles smoother than ever before. I ran a can of gumout through the gas tank to clean any build-up and deposits left as a result of driving the truck while the fuel ratios were astronomically out of range.

I will try to be more attentive to this thread. I apologize.

 

Lmmfao all good I had hoped it just worked out and you went on about your business. I forgot about this thread as well lol

 

I'm amazed at utterly useless and EGR valve is; if not detrimental in this instance.

Now I'm trying to find a tool box that will fit in this ole bastard without breaking the bank...