My Wife's 04 Punto has just suddenly started blowing ridiculously loud - the noise is deafening and sounds like a Spitfire!

We replaced the front section of the exhaust about 3 months back due to corrosion - worked fine since then.

Suddenly today she got about half a mile from our house and this started.

When she pulled over and put it in neutral the revs were peaking to about 2k, then the engine would almost die, then back up - on an endless cycle about once every two seconds.

The noise is so loud it is almost impossible to pinpoint where it is coming from Definitely from within the engine bay rather than further back as with the exhaust - it sounds like from the top of the engine - rather than the base - but given the volume when you go anywhere near it it's almost impossible to determine.

Any initial thoughts/suggestions?

My primary concern is - safe to drive home? About a mile or so.

Apologies - should have added it is the 1.2 Active.

Here is the link to the previous post from my wife to clarify what the issue was last time and what was repaired

https://www.fiatforum.com/punto/280236-punto-04-blown-exhaust.html?p=2843768

A Super Loud Blowing Noise again is going to be the exahust system

It could be the Cat has blown a hole on the manifold part = Super loud Noise in a cofined space in the engine bay

the 2k RPM is because the lamba sensor is picking up Way to much oxygen - so its fueling up higher, But because air is creaping in where it should

lots of fuel and lots of air = Rev's increase

Get the Source of the Noise/Leak and report back
My guess is going to be the Mani-cat

ziggy

Thanks - from that okay to drive home then?

A very short distance should be OK. Wear paper bags on your heads to cover the embarrasment.

Heh - I followed behind with the kids in my car! Hear it myself and concur with what she informed me other than to add noise sounds the same as when the fron of the exhaust blew.

Also the engine management light is flashing - would this stack up with the above analysis?

blue_manc said:

Heh - I followed behind with the kids in my car! Hear it myself and concur with what she informed me other than to add noise sounds the same as when the fron of the exhaust blew.

Also the engine management light is flashing - would this stack up with the above analysis?

Click to expand...

yes a blowing exhaust will be Picking up way way way to much oxygen

So the ECU is probably putting up a fault Lamba Sensor - To lean error

ziggy

Thanks Chaps - I'll take it in tomorrow and report back.

blue_manc said:

Thanks Chaps - I'll take it in tomorrow and report back.

Click to expand...

open the Bonnet and Run the engine - have a look - its going to be obvious as hell where its blowing from

Ziggy