ATECvr731RH
NAXJA Forum User
- Location
- Bronx
2000 XJ 4.0 4WD AT, Bought this jeep Mar 2014 with 87,000 on it now has 189,000, When I turn on the A/C the engine Idle would bump up about 150 rpm when the compressor clutch would engage & go back to base idle when the clutch would disengage, about a year ago the idle no longer bumps up when the clutch engages, I didn't think much of it for a while figuring that without it I would probably get a little better mileage, but I am now finding that it is probably necessary to keep the alternator output up when under full load (Headlights + wipers + cooling fan + max A/C etc... ) there are no regular idle issues. maybe a PCM input issue, Would appreciate any ideas !