My 97 Chevy c1500 4.3 Lt runs perfect while sitting g on the driveway.When I drive it and go to 4th gear at around 2000rpms, the truck starts hesitating.the code shows multiple misfire.
I noticed it does it early in the mornings when it's cool but not during hot
weather.Ive replaced distributor parts,coil,cables,plugs,crankshaft sensor,cam
position sensor,mass sensor, intake position sensor.
Check egr valve and lines goi g to it
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