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tpulliam79 · 10-29-2008, 12:50 PM

ok just got back from Meineke for some warranty work, they are telling me the cat is bad and this is why im having issues. another shop tells me that the cat and muffler cant affect anything at idle? im confused. also whoever had truck before me welded in a 2 inch muffler and all the other pipes are 3 inch obviously causing restriction. the muffler is going to be replaced in the next couple days, had the cat backflow tested and they said its 1 lob and is not plugged. could the cat being bad ( not working right) and the wrong size muffler affect anything at idle?

10-29-2008, 12:50 PM	#93
tpulliam79 Registered User Join Date: Sep 2008 Location: spokane valley, wa Age: 29 Posts: 283	Re: 1991 chevy 1500 5.7 tbi erratic idle ok just got back from Meineke for some warranty work, they are telling me the cat is bad and this is why im having issues. another shop tells me that the cat and muffler cant affect anything at idle? im confused. also whoever had truck before me welded in a 2 inch muffler and all the other pipes are 3 inch obviously causing restriction. the muffler is going to be replaced in the next couple days, had the cat backflow tested and they said its 1 lob and is not plugged. could the cat being bad ( not working right) and the wrong size muffler affect anything at idle? __________________ 1991 chevy 1500 ext. cab 5.7 TBI 1988 chevy reg. cab 5.7 TBI lifted 8" swampers ( GONE Wife made me sell it )