So I have zero idle on cold start. I also have a P0401 egr code. I’m assuming that’s what’s causing my idle issue. It idles, slightly rough, when warmed up. Going through the EGR diagnostics in my FSM and I’ve followed the steps. When I connect my vacuum pump to the egr on the right side and the left vacuum hose is connected the the intake chamber my engine has no effect when I apply vacuum. If I plug the left side and apply vacuum my engine dies. Would this still indicate a bad EGR?
I’m assuming it wants the left side connected to the intake chamber to give an equal force of vacuum on each side to cause the plunger in the EGR to activate and kill the engine.
Would this indicate low vacuum in the engine if I have to plug the left side to make it die when vacuum is applied?
I have a video of me going through the diag but I can’t figure out how to upload the video in the thread.
Any help would be appreciated.
I’m assuming it wants the left side connected to the intake chamber to give an equal force of vacuum on each side to cause the plunger in the EGR to activate and kill the engine.
Would this indicate low vacuum in the engine if I have to plug the left side to make it die when vacuum is applied?
I have a video of me going through the diag but I can’t figure out how to upload the video in the thread.
Any help would be appreciated.