GMC Jimmy Engine Idle Erratic

I Am Not Sure What The Problem Is And Am Guessing It Is Either Mechanical Or Electrical. This Is What Is Happening And It Doesn't Happen...

I'm Finding The Truck Idles Funny At Times. My Rpm's Will Rise And Drop Erratically, And My Oil Pressure And Volt Meter Gauges Fluctuate As...

Been Dealing With This 4 A Few Years, It Comes And Goes. Gone Threw A Few Different Tecs. My 98 Gmc Jimi Has This Thing Where When U Hit...

Rescently Had A New Long Block Put In, The Idle Is Searching At Idle, My Mechanic Has Put In A Tps, Iac And A New Ecm, No Change As Of Yet...