Re: 2005 jeep grand cherokee
Welcome to the garage.
Do you have a scanner to check the live data? No more fault code(s) shown?Does the MAP value with ignition on, engine off equalize the local barometric pressure?
I donīt know which engine you have, but it can be that the idle air control setting must be relearned. Maybe the wrong MAP value changed the injector pulse. Disconnect the battery for some minutes and try again.