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Do you have a gasoline engine?
If yes, then don't block it.
The only vehicles that appear to benefit are diesels.
The engine temperature sensor reads air temperature between the throttle and air filter. Not inside the intake manifold.
EGR reduction is normally only used on vehicles that left the factory with too much EGR, a desperate OEM attempt at bringing NOx levels down to acceptable levels. Too much EGR will cause vehicles to sputter at part throttle or have a bad spot.
As far as I know no large number of vehicles made after the late 80s or early 90s has had this problem, unless the EGR broke.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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