Hi ronald. Teston,
Thank you for the donation.
I believe the Idle Solenoid Control unit is intermittently causing the problem. It is attached to the lower part of the throttle body and when the gears are worn, chipped off or the valve and throttle body is dirty, it would cause the symptoms described.
I would suggest getting the ISC and throttle body cleaned and retest.
Wednesday, February 17th, 2010 AT 6:43 AM