Joined: May 2003
Location: Montreal, QC, Canada
Originally Posted by aussietrail
............The QR25DE does NOT have an EGR valve indeed, instead it uses large valve overlap at cruise and under engine braking to suck exhaust gas back in from the exhaust manifold.
Which was why there were engine failures in the early QR models because the fine particles broken away from the pre-cat core would get sucked back into the engine and "skratch away" the cylinder walls
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(QR25DE w/ HS CAI & Header, UR pulley, Timing Advance, SS DP, Magnaflow cat, res & muffler, SS 2.5" exhaust, APEX'i S AFC II, JWT BSR, Tein-S suspension coils drop, A34 SE 18" Mags)