New throttle body - Limp Mode

[mikelouf2]

Hello I put a new throttle body on my 2004 Tahoe. Keep going in to limp mode. I keep clearing it driving it around how long to it will relearn it self. Has a rough idle. For know I only driveing local thanks guys

 

[Fless]

You may want to see what OBD code(s) are in the system. Put a good bi-directional scanner on it and when it goes into limp mode write down the code(s) and take a look at the freeze frame data if you can.

 

[drdave81]

Let's back up. What made you replace the throttle body? What brand part did you use?

 

[rockola1971]

When you say its "going into limp mode", what do you actually mean? Check engine light flashing? Or is it on steadily? Does the instrument cluster readout say "reduced engine power mode"?

 

[mikelouf2]

I put on a new throttle body when I first start it light will come on for the throttle body sensor and it make it go into limp mode also getting po300 code a few times I keep driving it with the scanner to that throttle body relearn itself.

 

[mikelouf2]

I think the throttle body I got is no good it won't start know

 

[Rocket Man]

There is a known issue with the TB wires right where they connect to the TB. The wires inside the plastic jacket can break and although they look fine on a visual inspection the copper wiring inside can have a break. You should replace the pigtail and solder the wires together and use heat shrink so they don’t corrode, just in case. There is a TSB on it but I can’t find it. Amazon or most auto parts stores have the pigtails. Here’s a link to a discussion on it. If you search on TYF you can also find mention of it.

https://www.justanswer.com/chevy/56xb7-chevrolet-tahoe-4x4-told-recalls-5-3l.html

 

[Tonyrodz]

There is a known issue with the TB wires right where they connect to the TB. The wires inside the plastic jacket can break and although they look fine on a visual inspection the copper wiring inside can have a break. You should replace the pigtail and solder the wires together and use heat shrink so they don’t corrode, just in case. There is a TSB on it but I can’t find it. Amazon or most auto parts stores have the pigtails. Here’s a link to a discussion on it. If you search on TYF you can also find mention of it.

https://www.justanswer.com/chevy/56xb7-chevrolet-tahoe-4x4-told-recalls-5-3l.html

Also check your grounds. Especially the driver's side frame, right near the running board. A known issue, especially for guys in the rust belt.