Engine Performance problem
1994 GMC Jimmy 6 cyl Four Wheel Drive Automatic
I have a 4.3 Vortec with VIN"W" and it like right off idle and a low speed until it shifts into 2nd there is a hesitation and while coasting the idle surges- it doesnt stall out though- it has a new MAP sensor, intake air temperature sensor(got a SES for it) But if I drive it for about an hour on the highway and stop at a light and take off sometimes it wont hestitate until a few stops, it was really bad but I pulled the IAC valve and cleaned it, check EGR which one side was loose so I cleaned it - reinstalled with new gasket, new PCV valve. I am getting a SES for 35 (IAC valve and 43(knock sensor) the knock sensor is not hooked up due to a broken plug would these 2 items cause my problems? It starts great, idles great- might have a little pop every once in a while
have the same problem?
Tuesday, January 5th, 2010 AT 7:33 AM