Boost Testing your diesel is essential! Common symptoms of a boost leak include Increased Smoke, Higher EGTs, Excessive Lag, and Loss of Power. Every truck that comes in our shop here at Calibrated Power, gets a boost test. It seems about 85% of them have a boost leak when they show up. Most of the time customers report still seeing peak boost on their gauges despite a boost leak.
If you work with diesel trucks long enough, you’ll see leaks just about everywhere in the charged air system at one time or another. Remember, the charged air system includes anywhere from the turbocharger to the intake manifold. Your Intercooler system, Exhaust Gas Recirculation components, and even the Turbocharger compressor cover can all develop boost leaks.