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Gelbster · 10-31-2017, 06:14 PM

An essential tool imho to buy when you do an AOS R&R is a Digital Manometer. Check out Pyle on Amazon . They are cheap and easy to use from the driver's seat.
Just test the old unit, then the new one.If in future you suspect AOS failure a quick, easy test gives a definitive,easy to read result that you can share here.
I had what I thought was a marginal AOS, replaced it and thought it was a dud. The Manometer test indicated it was good. The real cause of the dense smoke when cold was a leaking injector that was gradually deteriorating ! If I had let it get hotter, the next stage would have been flames !
That was a good example of the value of a $20 ,dedicated diagnostic tool and some helpful tech advice from Renntech.

10-31-2017, 06:14 PM	#5
Gelbster Registered User Join Date: May 2014 Location: S.California Posts: 2,029	An essential tool imho to buy when you do an AOS R&R is a Digital Manometer. Check out Pyle on Amazon . They are cheap and easy to use from the driver's seat. Just test the old unit, then the new one.If in future you suspect AOS failure a quick, easy test gives a definitive,easy to read result that you can share here. I had what I thought was a marginal AOS, replaced it and thought it was a dud. The Manometer test indicated it was good. The real cause of the dense smoke when cold was a leaking injector that was gradually deteriorating ! If I had let it get hotter, the next stage would have been flames ! That was a good example of the value of a $20 ,dedicated diagnostic tool and some helpful tech advice from Renntech. Last edited by Gelbster; 11-01-2017 at 06:20 PM.