Was trying to figure out where the IAC valve was on my engine, and I found out that it is on the intake runner that feeds the rearmost cylinder and has a whole bunch of vacuum hoses that snake over the intake manifold. WTF were they thinking with this setup??? This is the most convoluted IAC valve setup I've seen on an engine - so many potential vacuum leaks waiting to happen. Also makes valve adjustments a PITA since there is so much stuff that needs to be taken off.
Here is the M20B27 IAC valve setup (not my car, but similar):

Found out that the M20B25 has a much simpler setup that hooks up the valve straight from the intake boot to the intake manifold. Here is the M20B25 setup:

Would I be able to convert my M20B27 IAC valve setup to the M20B25 IAC valve setup while retaining the B27 intake manifold and valve cover?
Here is the M20B27 IAC valve setup (not my car, but similar):
Found out that the M20B25 has a much simpler setup that hooks up the valve straight from the intake boot to the intake manifold. Here is the M20B25 setup:
Would I be able to convert my M20B27 IAC valve setup to the M20B25 IAC valve setup while retaining the B27 intake manifold and valve cover?
Comment