that is the EGR modulator. #8
it's tricky to test that, and can not cause idle stalls or idle issues, it only operates, when car is moving, and throttle off the idle stops.
that is the bark tube #13, the large tube is a direct shot all the way to the exhaust #4 port, this is normal, there is no valves on that side.ortube.
this 13 tube is the tube that senses exhaust back pressure at all times, running. (engine load is sensed via CAT converter back pressure)
the main valve #5 is the valve behind the intake manifold
the plastic valve is the modulator. #8
P nipple goes to plenum (via the VSV valve)
Q tube goes to the EGR main steel nipple at #5
bark tube #13 exhaust goes to the bottom of the modulator valve. this tube is never blocked. it barks at all times running.
The Bark tube 13 goes to the bottom bark large nipple on the EGR main 13.
![[Image: 92-95-EGR-16v.jpg]](http://www.fixkick.com/sensors/EGR/92-95-EGR-16v.jpg)
it's tricky to test that, and can not cause idle stalls or idle issues, it only operates, when car is moving, and throttle off the idle stops.
that is the bark tube #13, the large tube is a direct shot all the way to the exhaust #4 port, this is normal, there is no valves on that side.ortube.
this 13 tube is the tube that senses exhaust back pressure at all times, running. (engine load is sensed via CAT converter back pressure)
the main valve #5 is the valve behind the intake manifold
the plastic valve is the modulator. #8
P nipple goes to plenum (via the VSV valve)
Q tube goes to the EGR main steel nipple at #5
bark tube #13 exhaust goes to the bottom of the modulator valve. this tube is never blocked. it barks at all times running.
The Bark tube 13 goes to the bottom bark large nipple on the EGR main 13.
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