A couple of weeks ago I did a thorough cleaning of the throttle body, IAC and all grounds on the XJ, reset the PCM and afterwards it was running smoothly and starting nearly instantly.
This morning I R&R'd the injectors (upgrade to 784s), reset the PCM again, and now cold starts are are sluggish, taking 3-4 seconds of cranking. If I shut it off and restart it soon after (within a minute), it starts as it was before. It runs really smooth with the new injectors, but cold starting has definitely been negatively affected.
Should I wait for the PCM to learn for a while, or is there something I should start looking into? I'm guessing that it might be draining back fuel as it sits, but I haven't rented a fuel pressure gauge to see how quickly it bleeds off. I've owned this XJ for ten years, and it's always cranked over really quickly, even after sitting for a long while (weeks or even months at a time).
The only thing besides the injectors that was disconnected and reconnected during the procedure was the battery and the IAC. The battery, which is only a couple of months old, has a full charge.
Any help would be greatly appreciated. TIA
This morning I R&R'd the injectors (upgrade to 784s), reset the PCM again, and now cold starts are are sluggish, taking 3-4 seconds of cranking. If I shut it off and restart it soon after (within a minute), it starts as it was before. It runs really smooth with the new injectors, but cold starting has definitely been negatively affected.
Should I wait for the PCM to learn for a while, or is there something I should start looking into? I'm guessing that it might be draining back fuel as it sits, but I haven't rented a fuel pressure gauge to see how quickly it bleeds off. I've owned this XJ for ten years, and it's always cranked over really quickly, even after sitting for a long while (weeks or even months at a time).
The only thing besides the injectors that was disconnected and reconnected during the procedure was the battery and the IAC. The battery, which is only a couple of months old, has a full charge.
Any help would be greatly appreciated. TIA