On the way to work this morning I noticed that the exhaust note of the car is a fair bit deeper than normal, and sounds a bit like the chavvy backbox I had on my other 306 (this one's a standard exhaust). It did not sound like this yesterday, and it was like this on the way home as well.

The engine pulls just as well as before as far as I can tell, and the revs climb just the same, but seem to be a tiny bit slower to fall (although I could be imagining this part).

Over the weekend I'm going to have a proper look around the car to see what this might be, my first thought was that my cat is on the way out and the inside has collapsed, thus leaving much less of a restriction in the exhaust. I could hear no rattling though.

At this stage, if anyone has any ideas what this might be, or anything else I should check in order to narrow the cause down then your advice would be much appreciated.

Will update with findings once I've had a proper play around.

Thanks!

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61k miles Ph.1 Diablo '6 Project Thread

Hole. Get underneath with it running and have a look.

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Senior Test Automation Engineer for the 306GTi6 Owners Club Forum

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Look at the rear of the cat a few inches in front of where it joins to the mid-section, there is a weakness there. This went with very little warning on mine, and got worse very quickly to the point where it was split almost all the way around - you could see daylight through the split - and the noise was deafening, all within about 40 miles. Got it welded and it is holding up so far but replacing cat time is coming I reckon.

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Cherry Rallye SOLD

Exact same happened to me literally one week after it passed an mot.

Crazy how fast they split when they do

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Ex- Phase 3 China GTi-6 T-Reg

Sounds more like an air leak around filter area.

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Pug fee`ver,

Pick a Bogey, buy a Pug.

Black 306 GTI 6 Standard, was 60k mileage, bargain!!

Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & =

I feel your pain.

I've got a major leak just before the cat (cat has been welded in on mine) and im just waiting for it to snap off completely....got a 2nd hand cat and Peugeot exhaust system ready to put on but its finding the time and someone to do it who wont rip me off

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''Oh, it does handle like a golf!'' Why drive a Golf....when you can drive a GTi-6?

-1 For Putting A Capital Letter At The Start Of Every Word

+1 for the 5th and 6th cylinders kicking in. they tend to do that at this age of these cars now

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306 rallye reproduction decals (full sets/individual decals) | 306 b-pillar textured vinyl weatherstrips
306 slam panel esso stickers | 306 yellow / orange / pension fund red side door badges
gti6 inlet manifold badges | 306 rear boot badges (p2/p3)
winner of Extraction of toys from prams with outstanding vigour award 2009 [source: gti6 owners club]

I got it welded up for a contribution to the coffee fund and it's still holding out.

Good result.

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61k miles Ph.1 Diablo '6 Project Thread

I tried this and a snake bit me. Maybe I'll turn my engine on next time I hear a hissing noise

Good tip, in this case the hole was very, very easy to find as the cat split away from the exhaust the whole circumference of it.

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61k miles Ph.1 Diablo '6 Project Thread