Engine won't go past 1200 rpm Feb 22, 2010 17:11:07 GMT -5
Post by nipper on Feb 22, 2010 17:11:07 GMT -5
An interesting thing is though discovered...
I attached a vacuum gauge to the intake manifold and idled the engine until it was warm. (Radiator-fan begins rotating).
At idle, the vacuum seems to bounce a little up and down (might have to do with the position of the nipple I attached the gauge to), but the needle stableize when I increase RPM just a little. At higher RPM, the vacuum reading doesn't seem right at all, since it drops instantly when I go to full throttle.
My latest theory, based on the above symptoms, is that the intake manifold gasket is leaking somewhere, and that the shape of both the manifold and the engine crankcase is hampering tests with starting gas (spraycan with ether and other flammable gases) to reach the leak, thereby not detectable using this method.
Does this seem likely?
This is valid for all engines