Jrankin89

Just replaced the injectors on my 4.0 il6, now I'm getting a bad miss, no leaks, plugs, wires, battery,water pump,thermastat,transmission, all sensors ,are new except the cps, any ideas? Bad injector?

crabmushrooms5

What injectors did you use? Learn the computer?

Jrozar

How do you learn the computer?

Fred/N0AZZ

After a reset letting the engine run till it finds the proper air/fuel ratio for the injectors that you have installed.

98XJ40K

Disconnect battery cables and touch them together for 30 seconds. This will fully discharge the system and the computer will re-learn the proper ratio after multiple cycles.

crabmushrooms5

scary af in my mind to do that.

98XJ40K

Seems counterintuitive, but works the same as disconnecting them for an hour or two. Make sure BOTH cables are off of the battery BEFORE proceeding.

94XjSport94

How is connecting two wires with no power running through them scary?

I just leave mine off for a few hours.

cruiser54

And after all that, the Renix never needs resetting or can be reset.

OP, I'm guessing you don't have an injector plugged in all the way or you busted the line from your throttle body to MAP sensor in the process of installing the injectors.

crabmushrooms5

spent so much time avoiding touching red and black. doing it on purpose makes me think too much

investinwaffles

Did you check to make sure you dont have any vacuum leaks? If no, I would wager that an injector may be faulty.

Unplug each injector until you find the offending cylinder (unplug one by one, if it runs rougher than the injector was working properly, if there is no change than you probably found the misfiring cylinder)