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98 v70xc exhaust cat question

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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Oitsujosh
Posts: 39
Joined: 27 October 2015
Year and Model: 99 V70 XC
Location: United States

98 v70xc exhaust cat question

Post by Oitsujosh »

Hello all, I'm new here to this site. I have gotten a quote from and Indy exhaust shop that I have used for other cars and are pretty good. They told me that I need a new cat and muffler. They told me to save $ they could weld in a OBD1 cat because of the age. They did say that this may throw check engine light it due to the age it won't affect the state inspection. My question is if does throw a code what would it be and would it affect the fuel mileage? Any thoughts on this would be great. Thanks in advance.
99 V70xc Darkwing (gone😔)
08 xc90 Tabitha
06 V50 T5 Awd 6spd. Skeeter
66 barracuda "very long term project"

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misha
Posts: 5379
Joined: 7 December 2008
Year and Model: '97 850 2.5 20v
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Post by misha »

It's time to change exhaust shop.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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dosbricks
Posts: 1116
Joined: 30 December 2004
Year and Model: '96 855, '98 S70
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Post by dosbricks »

Welcome to the MVS forum, Josh.
I agree with misha. Anything that intentionally throws a code (probably PO422) is not right for the car. And yes it would likely effect fuel mileage because of fuel trim running rich.
'98 S70, 230k, purchased new in '98
'96 855 GLT, 163k, purchased lightly used in '99
Onceuponatime RIP '69 Shelby GT500 w/7.0 liter

Oitsujosh
Posts: 39
Joined: 27 October 2015
Year and Model: 99 V70 XC
Location: United States

Post by Oitsujosh »

That's what I figured. The stuff I've used them for before was some older cars. Thanks for the input!
99 V70xc Darkwing (gone😔)
08 xc90 Tabitha
06 V50 T5 Awd 6spd. Skeeter
66 barracuda "very long term project"

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rspi
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Year and Model: 850 T-5R Wagon
Location: Cincinnati OH
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Post by rspi »

'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
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Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

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