How long since a tune-up? Any applicable mil codes? You can check those yourself. If it is only an idle issue, clean the throttle-body and idle air control.
June, 6, 2011 AT 5:54 PM
Its not a astro van.I dont know how that got on there. Its a 4.3 v6 c 1500 pick up
June, 6, 2011 AT 6:04 PM
I see, the info is still valid. Let us know.
June, 6, 2011 AT 6:19 PM
It was just tuned up from the previous owner and he said it never did this until it was tuned up. Im thinkin the firing order is wrong
June, 6, 2011 AT 6:28 PM
OK, below is the firing order.
June, 6, 2011 AT 6:42 PM
What a bout a bad valve or piston?
June, 6, 2011 AT 6:51 PM
If you think you have a dead cylinder, check for a dead cylinder. You kill the cylinders one at a time, quickly, If the cylinder you kill has very little or no effect on the idle rpms, that cylinder is dead or weak.
What about the firing order? You seemed to think that was the problem?