quote:Originally posted by Marlin Jack:
...when the Choke is removed, it leaves a 'Live' Vacuum Port, uncovered.
It looks like You have a Plug in there, but how good is the seal. When I removed My Chokes I screwed in self-threading screws with sealer.
You might take a hose to the ear, and listen there, when the engine is running, just to be sure.
ALL of us, with recommendations, must Know.
1. The Engine ran great, Until this Problem came-on Gradually.
2. The Problem is Off-Idle, and Improves with Higher RPM in Cruising.
3. A Blown Power Valve would cause the Engine to Run Very Poorly, Flooded Out, the Fuel Bowl would be constantly EMPTY, and A Cloud of Black Smoke would be Pouring out of the Exhaust.
I have had TWO degress of PV failure. I can clearly document them with the PV tester that I bought.
The most common is the completely blown out, will hold NO pressure.
There is a second kind. One that I never suspected.
What happens with that one is that it has a slow loss of pressure that happens over maybe a period of four or five seconds. You would never even find this one unless you removed it from the car and put it in the tester.
This type two seems more likely because of the lack of black smoke and other unmentioned symptoms?
Sincely, Doctor Doug.