94 ford e350 5.8l,new motor,surges and detonates prematurely.new map,iac,and 02sensors map unplugged runs fine
It also has new injectors. when the map sensor is plugged in it bogs down.
also what components control timing andor spark advance.
its already had 3 map sensors and when u unplug it it runs fine so its getting good
fuel and pressure
is ect the coolant temp sensor?
Answer
I would say you have a bad map sensor, even though it is new, it still could be bad. otherwise, check your fuel pressure and make sure it is ok.