Search results

Update: Truck received 2 new injector rails and all new port/direct injectors. Major problem with the misfires creating the shudder are fixed. Will receive the truck on Friday and report back and share info in the paperwork. TSB was also installed for PCM tuning - not sure if its 22-2224 or...

wilmaj32 - check out this guys youtube - - he went through the exact same thing we are going through.

Update: Techs were able to use my Power Balance tests to narrow down to ignition system. Plugs and coils were fine and they determined that it was an injector issue. Instead of troubleshooting the injector rail assemblies, they ordered two new injectors. They said that 2 of the injectors are...

Appreciate the info flasch192 - will see what the dealer comes back with and I'll ensure they apply the TSB. HunterTaylor - my dealership really wanted evidence, so thats why I did my own Power Balance tests. Hopefully that will drive a deeper search and ultimate application of the TSB. They...

Thanks JEB! I appreciate that insight. I'll make sure to mention that as well. Where is the most trusted source for watching or finding release date/information? For JEB and others, I also read that the MAP sensors in the Powerboost can become dirty more quickly because of the ignition...

+1 for results here. 17K on a 2021 Powerboost. Shudder starts after engine warms - most egregious on highway speeds - misfires on 2 is mostly seen, resulting in the transmission shudder. Have to lock out gear 8-10 just to not have my eggs scrambled. Shudder happens worse at inclines when load is...