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NoDOHC · 11-17-2008, 12:32 AM

Misfiring is your biggest enemy for the Hydrocarbons. Run stock timing and get some load on the engine at idle (headlights, heater motor, etc.) it really helps idle emissions.

Make sure that you have good engine grounds, the 3800 rpm hesitation has gotten me a fail before (full driving cycle test though).

Like they all said, get a functional cat and an air pump and all is good.

The EGR is completely unnecessary too (can still pass emissions without it).

11-17-2008, 12:32 AM	#20
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	Misfiring is your biggest enemy for the Hydrocarbons. Run stock timing and get some load on the engine at idle (headlights, heater motor, etc.) it really helps idle emissions. Make sure that you have good engine grounds, the 3800 rpm hesitation has gotten me a fail before (full driving cycle test though). Like they all said, get a functional cat and an air pump and all is good. The EGR is completely unnecessary too (can still pass emissions without it). __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)