I have a 1997 Isuzu Rodeo. Sometimes it won't start. A light tap or two on the ERG valve would solve the problem. That doesn't work anymore. Could the erg valve be bad? I've tried taking it off and cleaning it.
There could be a leak in the system. You might want to check the valve and the gasket. This post may help:
Updated on April 15, 2018
By Dan Ferrell