I've recently done a full egr delete (parts from First Coast Diesel Performance), oil cooler, and STC fitting replacement. This work was completed two days ago. Since then...the following things are happening:

1 - air conditioning doesn't work well at idle (seems to work sometimes and not work other times).

2 - on two separate occasions, major surge in rpm's, both instances lasted about 1 second for each surge for a total time of about 3 seconds.

3 - today while driving home the 'check guages' notification came on and the transmission temp went red. Also a loss of power. The truck just seemed confused.

I really would appreciate some help guys. Like everyone, I need this truck to work. Other than what's listed above this truck has zero mods. No tuners or anything.