I had a banks header installed and I get rough idle occasionally and it feel like it's injecting wrong, I have not cleaned the IAS (idle adjustment sensor). The injectors could be bad but I doubt bc I only 111,000 miles, could someone tell me a way to find out the correct order to make sure they are in the correct order?

 

Theres no specific order. Sounds like you have a vacuum leak. intake or exhaust gasket was installed wrong giving you a leak, or for some unknown reason they removed the injectors and cracked one of the o-rings.

 

Um... There is an order. The fuel injector wires have to be in the right order. Otherwise it will be spraying fuel at the wrong time. How to determine the order after you've mixed them all up.... Idk, someone else will need to chime in.

 

Uh, same order as the firing order, maybe?

 

Hard to mess em up, they are to short to go to any other ones.

 

He said he has "rough idle occasionally." If he somehow managed to stretch the connectors to the wrong injectors, it wouldn't be just an occasional problem, and not just at idle. The 2000 has a waste spark system that fires the spark plug on both the power stroke AND the exhaust stroke (to burn off unspent fuel). If the injector were injecting at the wrong time, it would turn the exhaust stroke into a power stroke fighting against the power stroke in another cylinder. Even if it didn't fire for some reason, the unspent fuel hitting the header would cause a lot of backfiring. If he has an occasional rough idle, it's doubtful it's because the injectors are hooked up out of order.

Actually, I'd like to see that done on a junker, just to see what would happen. I suspect it would just quit.