1999 suburban k2500 last 4 months idles rough ONLY WHEN WARM, idles great when cold not until it warms up (drive at least 15 minutes) before it starts to happen. Just replaced Mass Air Flow Sensor, PCV Valve, and Fuel Pump by a Auto Shop they said that was all my problems, still idles rough when warm ONLY. Drops from 700 rpm to 400-500 rpm every 30 or so seconds, it is intermitten so not a miss.
Please help getting really annoyed put over $1900.00 in last 3 weeks into it, with tune up trans flush oil change radiator and everything else mentioned
have the same problem?
Wednesday, December 17th, 2014 AT 5:56 AM