My blazer has gotten more sluggish after replacing the spider injector assembly. When I'm accelerating to merge into the highway it is a lot slower. The car runs fine otherwise. Any ideas of what it could be. I've checked fuel pressure air and ignition the inside of my engine was extremely clean.

 

Do you have a scanner that can look at live data? If so let’s start with fuel trims.

Did you change the fuel filter

George

 

Are you sure you put all the injectors in the right ports? IIRC, two of them need to be crossed, which can be confusing.

 

I should be able to get some live data over the weekend I'll be sure to post pics if I can!

 

I watched around 10 different videos online as well as read the instructions and made sure the numbers corresponded from the spider injector to the engine ports I also make sure that they were completely seated.