after my truck sits long enough for the engine to get cold - it starts up fine.. but if i try to go it bucks and sputters something awful... HOWEVER if i start it and let it idle for 10/15 minutes and get warmed up it runs like a dream and continues to run nicely when its warm. I've tested the IAC, MAP, and coolant temp sensors which all seemed O.K., the truck was storing a code for an oxygen sensor which we also replaced. we have also tried plugs AND wires, replaced the throttle position sensor, and a new tank of high octane gas. any ideas what else to try? im stumped.. 1992 s-10 Blazer 4.3 vortec CPI


sometimes i wonder why i bought something without an H in a square on the hood..

 

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