Shakey idle and sluggish take off

[ryan445]

Wires, rotor and and coil are done. I noticed on start up and high idle, the computer was hunting the rpms a little. Maybe relearning with the new coil? It eventually smoothed out. Idling a little smoother. But still has a stumble. Will do the fuel filter later today or tomorrow and go grab some premium gas and put the treatment in. I scanned it to see if throttle body code has stayed away and it has this far. Here is a link to a vid I took you can see the stumble when I gave a little it and when it idles down.

PXL_20260523_145431353.mp4

drive.google.com

 

[rusty ol ranger]

Wires, rotor and and coil are done. I noticed on start up and high idle, the computer was hunting the rpms a little. Maybe relearning with the new coil? It eventually smoothed out. Idling a little smoother. But still has a stumble. Will do the fuel filter later today or tomorrow and go grab some premium gas and put the treatment in. I scanned it to see if throttle body code has stayed away and it has this far. Here is a link to a vid I took you can see the stumble when I gave a little it and when it idles down.

PXL_20260523_145431353.mp4

drive.google.com

Have you checked for vacuum leaks?

 

[ryan445]

Have you checked for vacuum leaks?

I have with the good ole spray carb cleaner at lines and stuff lol.

 

[SenorNoob]

My idle takes a couple weeks to settle down after I pull the battery cable. YMMV.

 

[PetroleumJunkie412]

The tps sensor on a 2.9 has an eccentric on the bottom bolt. You move it in and out for your "calibration"

You're showing some signs of ecm capacitor failure, but don't let me lead you down the wrong path.

 

[ryan445]

The tps sensor on a 2.9 has an eccentric on the bottom bolt. You move it in and out for your "calibration"

You're showing some signs of ecm capacitor failure, but don't let me lead you down the wrong path.

If it turns out to be. It will be the second time I've replaced the ECM in the 17 years I've owned this truck. When I first got this truck it always showed two codes. Egr stuck open when it wasn't and another EGR related error. Truck ran fine until one day it lost all power, would barely move and was running so rich I could smoke out the neighborhood. After lots of trouble shooting I ordered this OEM ECM from eBay and fix all issues. So it could be this one is just slowly starting its demise.