hissing mondeos

You haven't driven through a snake pit have you ;-)

Not recently....how long would a snake be expected to live inside the engine bay?

Perhaps I'll wait until the weekend to have a look - I'd not like to be bitten in the dark ;)

Hey, don't knock it till you've tried it :->

It certainly sounds like the cat has broken up though.

Are the heater controls still working? These often dropped the vacuum pipe off under the manifold.

Thanks Andy,

The MOT is due in a couple of weeks, so I'll change the CAT and see if it's better.

I'll check the vacuum pipe too.

Cheers, Mark

Mark, Does the car have A/Con ? The compressor discharging can hiss for up to a minute after stopping.

The Vacuum hose under the coil pack does split on mondeos but this usually manifests itself with high idle etc..... There is two 10mm hoses from the exhaust to the Exhaust pressure transducer and they blow off if the cat is getting blocked.... the hiss will be more pronounced as the RPM increases... just to the rear left of the battery box.

other than that I say look for that bloody python under the hood !

JK

Hi JK,

Thanks.

No A/Con - I wish!

It's a Mk1 too, I should have said this.

I'll put my head under the bonnet over the weekend, but from what's been said the cat seems the most popular cause :( I thought that it was going some weeks ago when I heard a metallic rattling from inside the cat, so I'll just have pop down the breakers for another. Poor things done 150k, so is a little tired now.

Cheers, Mark

FWIW when my cat went (Mk II Mondeo @ 85K) it started with a light buzzing that got progressively worse over a month until the matrix let go all together and blocked the pipe meaning the car wouldn't rev under load higher than about 2K.

Seem to remember a new cat was £150ish plus labour.

Cheers

Kev