ok guys this what I have going on been trying to figure it out for awhile now. I seem to not be getting enough air my truck puffs black smoke when giving it gas to let say pass someone on the highway it will puff out smoke and clear up and go just fine but with a little lag. I have a blocker plate pvc reroute and 4 inch exhaust and the truck is set on stock right now. I did a boost leak test the other day by pumping air at 20psi to the hot side ic pipe and the only leak I could find was air coming out the back of the egr cooler where the blocker plate is. is there no gasket there only on the exhaust side. so my thinking is my egr valve is stuck open and im losing boost though the egr system. I did the test not long after it had been running but my thinking was the valve should be closed with the key off. just trying to get a idea if all this sounds right.
LBZ: boost leak
- Thread starter jmw1439
- Start date
Before I installed the EGR plate in mine I looked it over carefully and it was not manufactured/stamped very well. I took a piece a glass and some sandpaper and surfaced both sides. Can't expect a 50 cent piece of die cut metal to seal very well, had I installed it the way it was it definitely would have leaked. Which side did you push the gasket to, the uppipe or the cooler.?
If the plate is flat enough I would not be concerned about a gasket, if the plate does not seal what makes you think the gasket will help.
