Join Date: Nov 2014
Location: Jacksonville, FL
Mentioned: 0 Post(s)
Catch cans are usually for excess crankcase pressure on forced induction vehicles. It keeps the oily air from being recycled into the intake trac. The direct injection motors get carbon built up on the intake valves because fuel is injected into the cylinder directly as supposed to a port injection engine where the fuel is injected into the intake manifold and get into the cylinder only after flowing over the intake valves. The egr system is what recycles the unburnt exhaust gases back on to the intake valves. You will want to do a egr delete to get rid of that.
On the mazdaspeed vehicles those who didn't do an egr delete would just take their intake manifolds off clean em out and clean the intake valves, ever so often. The pcv valve recycles oily air into the I take track. Putting a catch can after that will prevent your intake from getting nasty. For more specific advise visit the forum for your malkeand model of truck.
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Last edited by Obijack; 01-09-2015 at 12:02 PM.