The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 88 Suburban V10 EGR removal for an idle misfire

Kudzupatch · 02-12-2018, 10:37 AM

You can just plug the vacuum line on EGR and see what happens. No need to remove or block it to test it.

But, you will see a lot of people with an misfire/unsteady idle with TBI that runs well otherwise. Mine does this and I have given up on finding the reason. ChevyTech suggests that alcohol in the fuel can contribute to this. I don't know but we do have it in our fuel. I just know it is common and I have never read about anyone being able to figure it out.

02-12-2018, 10:37 AM	#3
Kudzupatch Registered User Join Date: Apr 2013 Location: GUNTERSVILLE Posts: 621	Re: 88 Suburban V10 EGR removal for an idle misfire You can just plug the vacuum line on EGR and see what happens. No need to remove or block it to test it. But, you will see a lot of people with an misfire/unsteady idle with TBI that runs well otherwise. Mine does this and I have given up on finding the reason. ChevyTech suggests that alcohol in the fuel can contribute to this. I don't know but we do have it in our fuel. I just know it is common and I have never read about anyone being able to figure it out.