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Discussion Starter · #1 ·
how do i tell if i have a egr valve on a n/a?????
 

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check your emissions certification label under your hood. its a white label with writing. if it says california emissions certified it has EGR. if it says certified for federal emissions for xxxx model year new cars it doesnt have EGR.

i know my GFs 95 DOHC NA is federal and it doesnt have egr. not sure on the 97-99s though.
 

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Discussion Starter · #3 ·
ok ...my car is all federal spec
what does a egr valve do anyways
 

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Exhaust Gas Recirculation Valve
 

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an EGR valve recirculates exhaust gasses into the combustion chamber to lower combustion chamber temps by displacing some oxygen. it is used to lower NOx (oxides of nitrogen) emissions. 1 thing about EGR...it only operates at specific times. it does NOT operate at WOT so all this EGR blocking off is just a waste of time for all out power.
 
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