sjdon67 Posted March 23, 2012 Report Share Posted March 23, 2012 What is a A.B. Valve and what does it do? Quote Link to comment
banzai510(hainz) Posted March 23, 2012 Report Share Posted March 23, 2012 After Burner??????????????? anti backfire????????? try the manual??????? Quote Link to comment
datsunaholic Posted March 23, 2012 Report Share Posted March 23, 2012 Anti-backfire valve. It's part of the air injection system. When you get off the gas rapidly, unburned fuel goes out the exhaust. With the air pump supplying fresh air to the exhaust ports, this could ignite. The AB valve cuts off air from the air pump from getting to the air injection manifold under rapid decelleration (by detecting high manifold vacuum). Quote Link to comment
sjdon67 Posted March 23, 2012 Author Report Share Posted March 23, 2012 If its bad or leaking vacumm would it cause a car to run bad? Quote Link to comment
datsunaholic Posted March 23, 2012 Report Share Posted March 23, 2012 Yes. It's a vacuum leak. Any vacuum leak makes it run lean- characterized by an idle that can't be turned down below 1000 or so (either high idle on no idle) and an overall lack of power due to the lean mix. You can plug the vacuum line (at the manifold) to isolate it, and see if there's a difference. Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.