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1996 850 Blown Catalytic Converter

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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jose456891
Posts: 132
Joined: 13 June 2013
Year and Model: 850 GLT 2.4 1996
Location: Rockville
Been thanked: 1 time

1996 850 Blown Catalytic Converter

Post by jose456891 »

My fuel filter got clogged three days ago, I managed to jumped the fuel pump relay to force gas into the engine to get home. Then I replaced the filter, but the engine still ran badly. After a shot runs to the bone yard and parts store I swear that heard a large "boom". I got home and the tailpipe had melted pieces of the catalytic converter coming out. Now the car is running a bit better with a blown cat, it even has a sweeter low rumbling exhaust sound.

Lesson learnt: Always beat the moisture in the tank by keeping at least 1/2 full. And don't jump the fuel relay too long.

Next step: Gut the cat, and add spacer to rear O2 sensor. (Sorry tree huggers, I just can't afford a new cat right now).

Bluevanacd2005
Posts: 245
Joined: 18 October 2013
Year and Model: 1983 760
Location: USA

Post by Bluevanacd2005 »

Wow. Do you think an actual explosion took place in the cat? Maybe it was really plugged up and got too hot.
I like curves on my women, not my cars

jose456891
Posts: 132
Joined: 13 June 2013
Year and Model: 850 GLT 2.4 1996
Location: Rockville
Been thanked: 1 time

Post by jose456891 »

Not an explosion explosion, but it was loud enough for me to pull over. The pieces I recovered look like a melted grey honeycomb.

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