Exhaust question .........

Mike1967 · Dec 27th, 2010, 11:16

I have a "G" reg 1990 facelift 740 with Lamdasond .... On all my previous RWD Volvos they have had a Jetex full system fitted by a previous owner . I cannot get hold of the owner now as over time I have lost his email address .

I have done a search on here regarding fitting a Jetex system but im worried about the cat if removed will throw up a light on the dash .

The CAT on mine is starting to rattle a little .... and also im wondering if by fitting a Jetex system will improve power a little . Not that it's going to be a land speed record winner , but would be nice to improve it a little .

The car is only the 2.0i manual gearbox .

jpliddy · Dec 27th, 2010, 11:44

i had a stainless system on mine from manifold back ditched the cat . but its a 1995 940 tdi . no lights came on as these are pretty basic . yours being 5 years older shoud be basic too but you will need to check . hope some one here knows

CTCNetwork · Dec 27th, 2010, 12:17

Hi,

For the UK your car must have a Cat for 1992 cars onwards.

You could fit a system above with no cat so long as your emissions pass for the MOT then you are Ok.

The sensor for your emissions is actually fitted before the cat so a cats presence or absence will not make any difference to the readings!
However, if the elements of your cat are breaking up then they may be causing a blockage in your exhaust system and that could affect the cars running.

Des. . . ;0

Mike1967 · Dec 27th, 2010, 12:21

Thanks Des ... have sent Mike Brace a PM as from what I understand he used to be able to supply these and fit them .
No reply as yet though ....

davebslater(uk) · Dec 27th, 2010, 12:24

no probs with the cat on yours . dump it .

Steve940estate · Dec 27th, 2010, 13:37

Whats peoples experience with removing cats and passing the emission test ?
I know that testers are allowed to fiddle things slightly (within the test rules) to get some cars through by increaring the revs and warming the car up more etc.
Can a well maintained car pass the test without the cat fitted ?

wooble · Dec 27th, 2010, 14:32

Depends on the car, some cars will pass the sniffer test fine without a cat, and it's perfectly legal to remove the cat on any car first used in 1992 or before. My G-reg 240 never had a cat from the factory and passed emissions fine.

Michael J · Dec 27th, 2010, 14:39

Quote:

Originally Posted by Steve940estate

Can a well maintained car pass the test without the cat fitted ?

Yes. Easily.

Steve940estate · Dec 27th, 2010, 16:34

I have always wondered. My car was built in 94 so it needs a cat and must pass the idle and fast idle test, at least as far as I know.
There shouldn't really be any unburnt fuel as the Lamda sensor should pick this up. I will have to have a proper read up on it. The exhaust is pretty awful on my car and I don't really want the expence of buying a new cat if there is any way round fitting it.

For most of the time I don't think cats do a lot. It's only when they get really hot they work properly anyway.

davebslater(uk) · Dec 27th, 2010, 19:04

yours will need a cat if its working or not .

i can re skin old ones with stainless into a 3 inch cat if need be

Dec 27th, 2010, 11:16	#1
Mike1967 Premier Member Last Online: Dec 12th, 2018 12:36 Join Date: Dec 2003 Location: Here ......	Exhaust question ......... I have a "G" reg 1990 facelift 740 with Lamdasond .... On all my previous RWD Volvos they have had a Jetex full system fitted by a previous owner . I cannot get hold of the owner now as over time I have lost his email address . I have done a search on here regarding fitting a Jetex system but im worried about the cat if removed will throw up a light on the dash . The CAT on mine is starting to rattle a little .... and also im wondering if by fitting a Jetex system will improve power a little . Not that it's going to be a land speed record winner , but would be nice to improve it a little . The car is only the 2.0i manual gearbox .

Dec 27th, 2010, 12:17	#3
CTCNetwork Forum Support Team Join Date: Dec 2004 Location: Liège, Belgium View Photos By: CTCNetwork	Hi, For the UK your car must have a Cat for 1992 cars onwards. You could fit a system above with no cat so long as your emissions pass for the MOT then you are Ok. The sensor for your emissions is actually fitted before the cat so a cats presence or absence will not make any difference to the readings! However, if the elements of your cat are breaking up then they may be causing a blockage in your exhaust system and that could affect the cars running. Des. . . ;0 __________________ Density:- Not just a measurement ~ It's a whole way of Life.! ! ! I drive a Volvo, Please Don't Get In My Way! OldVolvos4Ever He shows up. People die. He vanishes. People should not be afraid of their governments. "He'll deliver more justice in a weekend than 10 years of your Governments should be afraid of their people... "V" courts & tribunals. Just stay out of his way." "I plan to."

Dec 27th, 2010, 12:24	#5
davebslater(uk) redbollock guru Last Online: Jun 30th, 2016 23:54 Join Date: Jan 1970 Location: lincoln	no probs with the cat on yours . dump it . __________________ www.dbsmotorsport.co.uk

Dec 27th, 2010, 16:34	#9
Steve940estate Steam Driven PC Owner. Last Online: Jun 11th, 2024 15:05 Join Date: Dec 2004 Location: Not sure.	I have always wondered. My car was built in 94 so it needs a cat and must pass the idle and fast idle test, at least as far as I know. There shouldn't really be any unburnt fuel as the Lamda sensor should pick this up. I will have to have a proper read up on it. The exhaust is pretty awful on my car and I don't really want the expence of buying a new cat if there is any way round fitting it. For most of the time I don't think cats do a lot. It's only when they get really hot they work properly anyway. Last edited by Steve940estate; Dec 27th, 2010 at 16:37.

Dec 27th, 2010, 19:04	#10
davebslater(uk) redbollock guru Last Online: Jun 30th, 2016 23:54 Join Date: Jan 1970 Location: lincoln	yours will need a cat if its working or not . i can re skin old ones with stainless into a 3 inch cat if need be __________________ www.dbsmotorsport.co.uk

Dec 27th, 2010, 11:44	#2
jpliddy VOC Member Last Online: May 3rd, 2024 14:15 Join Date: Dec 2006 Location: stoke on trent	i had a stainless system on mine from manifold back ditched the cat . but its a 1995 940 tdi . no lights came on as these are pretty basic . yours being 5 years older shoud be basic too but you will need to check . hope some one here knows

Dec 27th, 2010, 12:21	#4
Mike1967 Premier Member Last Online: Dec 12th, 2018 12:36 Join Date: Dec 2003 Location: Here ......	Thanks Des ... have sent Mike Brace a PM as from what I understand he used to be able to supply these and fit them . No reply as yet though ....

Dec 27th, 2010, 13:37	#6
Steve940estate Steam Driven PC Owner. Last Online: Jun 11th, 2024 15:05 Join Date: Dec 2004 Location: Not sure.	Whats peoples experience with removing cats and passing the emission test ? I know that testers are allowed to fiddle things slightly (within the test rules) to get some cars through by increaring the revs and warming the car up more etc. Can a well maintained car pass the test without the cat fitted ?

Dec 27th, 2010, 14:32	#7
wooble Stay gold baby! Last Online: Jul 24th, 2022 16:15 Join Date: May 2009 Location: Bristol	Depends on the car, some cars will pass the sniffer test fine without a cat, and it's perfectly legal to remove the cat on any car first used in 1992 or before. My G-reg 240 never had a cat from the factory and passed emissions fine.

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