Hi guys I am doing a side job and this thing has a rough idle. I put the scanner on it and pulled code 43 ESC and a ritch and lean code from the O2 sensors. I know the O2 codes are probley from running rough. It has been a while but could the knock sen be the problem or the ESC itself? I looked for the ESC by the throttle body but didn't see it. I remember what they look like but this is a late model 94 are they some where else? any help would be great thanks Jim

The Esc Maens Electronic Spark Controll.that Mode Is In The Computer Itself In The Car .does It Run Good Untill It Warms Up?if Is Runs Bad After It Warms Up The Coolant Temp Sensor Next To The Thermostat Is Prob Bad.anotherthing That Goes Bad Are The Throttle Body Gasket Underneath The Throttle Body A Hole Burns Through It Causing A Vac Leak.take Some Wd40 Arownd The Base Of The Throttle Body See What Happens..........

the truck runs like crap all the time at idle. No vaccume leaks around base plate. WHy else would I get get a code 43?