Ill start my 92 after it sits overnight and it will fluctuate between almost stalling n 1200 rpms. If i rest my foot on pedal for a minute its good after i let off after a minute.. Today though it idled at about 600 rpms on the verge of stalling. Then i let it warm up n it was fine. Idle at 900 rpms n no issues. Is something dirty or what? I was watching voltage for battery n it was moving alot a little lower then half then a little higher but never steady. Its 130 amp w underdrive pulleys. Thanks