Got a 454 BIG BLOCK 78.4L chevy truck
I've replaced the wires, plugs, cap & rotor, timed to factory, put new injectors, cleaned heads, replaced catalytic converters and MAP sensor and it still runs rough at idle 800 rpm and has very poor acceleration off the line. once it's up to speed it's okay - like past 35 miles an hour but it's still dogging it after I did all that replacement parts. I have a code reader also and it's not coming up with anything on it that I have not already replaced. please help
I've replaced the wires, plugs, cap & rotor, timed to factory, put new injectors, cleaned heads, replaced catalytic converters and MAP sensor and it still runs rough at idle 800 rpm and has very poor acceleration off the line. once it's up to speed it's okay - like past 35 miles an hour but it's still dogging it after I did all that replacement parts. I have a code reader also and it's not coming up with anything on it that I have not already replaced. please help
Mar 14, 2010 at 4:58 PM