Originally Posted by
SteveMcQouy
Just wanted to post a conclusion. It was not a vacuum leak or anything else with the car. I did vacuum test everything and everything held vacuum. I ended up getting a seal kit for the factory injectors and put those back in. Car went back to running normal. Clearly something is up with ECS injectors. I'm currently working on trying to do a return with them. However warning to all, they are giving me a hard time when I have pictures of how the injectors just don't fit right in the block and how they did not run correctly. Symptoms I had were failure to go into DFCO, bad idle, sparatic fuel trims. Running extremely rich. It was as if the ECU could not control the injectors.