catylitic converter empty 92 vandura


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catylitic converter empty 92 vandura

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dalesvandura
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dalesvandura profile image

Aug 14, 2010, 10:35 PM

Post #1 of 3 (2055 views)

catylitic converter empty 92 vandura	Sign In

i have a 92 gmc vandura 2500 5.7L 210,000 miles and my exhaust broke at the forward connection to the cat. inspection revealed it was empty even though it was supposedly replaced about three years ago before i got. it i have a couple questions. one being if it was replaced what could cause it disapear with out leaving chunks in the muffler. i took that off too and stood it on end to shake out potential chunks and came up empty. and the other question is will putting a new one on affect my mileage [i.e.] better or worse mpg and does this engine and vehicle require backpressure to run properly

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 15, 2010, 5:16 AM

Post #2 of 3 (2051 views)

Re: catylitic converter empty 92 vandura	Sign In

It sounds like someone decided to gut it out and then tell you it was replaced when it wasn't. Putting a new one on shouldn't effect your mileage but unless you live in a state that inspects emissions, it's probably not necessary. That's an OBD1 system so the cat is not monitored by the PCM.

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

dalesvandura
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dalesvandura profile image

Aug 15, 2010, 5:45 AM

Post #3 of 3 (2044 views)

Re: catylitic converter empty 92 vandura	Sign In

well then the guy i got it from got screwed too but thanks for the answer i still yhink im going to replace the cat despite not needing it just for ease of reassembly no one around here sells any exhaust pipe pieces in the 3 inch range and thats what came stock on the van ill check the numbers once i put the new cat on and let you know mileage numbers for sure

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