03-17-2020, 11:49 PM
this reasons for complexity is simple , it is called command authority.
if the iSC is commanded fully open by ECU (as yours is) and misfire is so bad , rpm only gets to 500 rpm
then the ISC can not flow more air , that is impossible. and all you get is 500 RPM.
That is why we do tests to see if THAT is happening,
misfiring can be tiny to huge, or crazy bad, all that is checked out carefully
for sure my hand force TV tests.
if spark is good and fueling is wrong check injectors. after testing the MAF.
if the iSC is commanded fully open by ECU (as yours is) and misfire is so bad , rpm only gets to 500 rpm
then the ISC can not flow more air , that is impossible. and all you get is 500 RPM.
That is why we do tests to see if THAT is happening,
misfiring can be tiny to huge, or crazy bad, all that is checked out carefully
for sure my hand force TV tests.
if spark is good and fueling is wrong check injectors. after testing the MAF.
http://www.fixkick.com