Mondeo 2.0l Zetec - Bert
R reg, Can anyone tell me why the 2 small diameter rubber pipes that go to the exhaust gas analyser (small alloy thing fitted to bulkhead) keep being blown off when I rev the engine.

Bert
Mondeo 2.0l Zetec - Malcolm_L
Could be for a number of reasons, however excessive back pressure from the exhaust is a possibility.
Has the fuel consumption increased and does the engine appear to be running hotter than normal?

Mondeo 2.0l Zetec - Bert
Only just happened this afternoon. The gases from the pipes was so hot it started a small fire in the matting material fixed to the bulkhead.
The 2 pipes come off of a metal pipe that runs from the exhaust manifold to another unit fixed to the side of the inlet manifold. This other unit looks like it might contain a diaphragm of some sort. Another metal pipe goesfrom that to the inlet manifold to form a gas circuit.
We have tried a few things so far but as soon as the revs rise off the pipes go
Mondeo 2.0l Zetec - Bert
Further to your suggestion of excessive back pressure, we have just put it back together again & tried it, there does not seem to be much coming out of the exhaust, so a blocked cat could be the reason.
How much for a new one
Cheers
Mondeo 2.0l Zetec - Bert
All OK now, new cat fitted for £225
Bert
 

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