4.3 V6. runs rough thru acceleration. Will idle well for a while and dies. Black smoke. It runs alot better than when I got it but still not right. What I have done.. NEW cap,rotor,wires,plugs,rebuilt TBI, new MAP sensor,O2 sensor and installed a COMPLETE exhaust from manifolds back. Also removed gas tank and cleaned it, installed new fuel filter. Did a compression check and had 155 high and 148 low. Oil pressure is also good. When I first got the truck it smoked really bad (black) I got a code for O2 sensor. Since it runs better (kinda) I am not getting any more codes and "check engine" has not come back on.
Oct 26, 2010 at 3:09 AM