Well the 94 Escort is still stalling at idle after going into cloesed loop.
Changed the IACV, TP Sensor, and O2 Sensor. Attempted to take the EGR out
of the picture by diconnecting and plugging both ends of the vacuum line to
its diaphragm, no significant effect.
The idle on closded loop is lumpy, erratic. Idle RPM will be good at times
and not at others. Usually when its going bad, the idle will get lumpier
and lumpier until it will suddenly stall. Idle RPM on cold open loop is
steady about 1500 to 2K. At the car warms up you can feel it go into closed
loop and thats when the trouble begins. Manifold vacuum on closed loop is
only about 14 in HG - seems low, and fluctulates at bit. Cant tell if the
vacuum fluctuation is following RPM or RPM is following fluctuations in
idle. I dont think I have any vacuum leaks anywhere. What's the next
Easter Egg, the EGR? Getting frustrated, not to mention cold working on it
this weekend! Maybe try blanking off the EGR valve ports as a diagnostic
before I plunk down another 50 bucks?
Again, once off idle the car runs fine!
the metal PCV line, and changed PCV valve. Hose clamped all joints. Also
disconnected and plugged the PCV line at the manifold port to no avail.
Googling on Escort + idle shows that a lot of them have problems at about
the same mileage as mine is, some due to dirty throttle body, dirty AMM
electrodes, etc. Will keep at it, chipping away at the possibles,,,,
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