GM Inside News Forum banner
1 - 1 of 1 Posts

1 Posts
one of the best posts WW on this subject.

but no one explains
what the ECU expects. no one. Parametric's?

(PCM) uses the expected changes in the manifold absolute pressure (MAP) sensor readings in order to evaluate the performance of the EGR system. T

rules for the monitor are in the FSM. but is lacking.
but the required pressure drop (map) is never disclosed.


i have discovered that the general guide lines are 6 to 8 inches/HG
on my map sensor that is. about 1v.

1.0v to 2.0v (inverse prop)

hope my ball park helps those doing the live tests.
many folks get down to that ,when at wits end.

cheers, jtgh
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.