My truck has been giving me fits with bad performance, and I sure hope ya'll can help me out. Firstly, I have changed oil, plugs, coil, new wires, EGR valve, TPS, transmission fluid and filter, and checked for vacuum leaks, but the engine is still sluggish after coming up to temp. It runs real good until then, but then it falls flat especially under load...going up grades. I have just about ruled out cat's because it runs too good when it's cold? I have pulled the codes and everything seems okay. Any ideas???? Thanks...
'94 EB Bronco