I’ve posted a couple times here with no resolve. My problem is a slight stumble or mis-fire at highway speed upon a slight reduction in throttle pressure. No codes and all new sensors and plugs, coil, wires and distributer. Black bear sees nothing unusual in the spark tables so I’m chasing the ignition and fuel circuit.
Is anyone able to explain what happens when you slightly reduce the throttle while at highway speed. As in what sensors see the throttle reduction and how is the spark and fuel compensated at just that moment? Been 4 months and the only thing progressing is my frustration!
Anybody I can really use the help?
Ex: Maf pressure reduced signals ecm to …………… do what to spark and fuel table? Vacuumreduction causes what?
Is anyone able to explain what happens when you slightly reduce the throttle while at highway speed. As in what sensors see the throttle reduction and how is the spark and fuel compensated at just that moment? Been 4 months and the only thing progressing is my frustration!
Anybody I can really use the help?
Ex: Maf pressure reduced signals ecm to …………… do what to spark and fuel table? Vacuumreduction causes what?