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jetmech85 · 10-08-2014, 10:35 AM

The aftermarket intake you have does not have an EGR and that is fairly common. It is likely your engine had one at one time. I still suggest reading the spark plugs and doing a compression test. Do you have catalytic converter on this engine?

10-08-2014, 10:35 AM	#29
jetmech85 Registered User Join Date: Sep 2014 Location: Texas Posts: 215	Re: 86 GMC Sierra Classic 2500 questions The aftermarket intake you have does not have an EGR and that is fairly common. It is likely your engine had one at one time. I still suggest reading the spark plugs and doing a compression test. Do you have catalytic converter on this engine?