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Ammonia smell.. #579062
31/05/19 07:41 PM
31/05/19 07:41 PM
Joined: Feb 2016
Posts: 1,466
Buckinghamshire
NickCW Offline OP
Has a lot to Say!
NickCW  Offline OP
Has a lot to Say!

Joined: Feb 2016
Posts: 1,466
Buckinghamshire
So curiously today I have started to smell Ammonia quite strongly under high load full throttle, i.e. 3rd/4th gear foot down at around 2.5/3k rpm.

I recall reading somewhere that this is often from old/broken catalytic convertors, however it is coming into the cabin from what smells like the engine bay so I am unsure as to what it is. Usually I get a bit of a strong petrol smell (like the engine is running rich), which I have been told is normal. I have had all fuel lines and connections checked by two Morgan dealers as I was paranoid about a fuel leak so I know it can only be the engine running rich..

Any thoughts/suggestions?
Don't want to poison my pregnant wife when driving ideally! hide

Last edited by NickCW; 31/05/19 07:42 PM.

Aero 8 S1
M3W - Green Shark

"What we do in life.. echoes in eternity."
Re: Ammonia smell.. [Re: NickCW] #579078
31/05/19 09:24 PM
31/05/19 09:24 PM
Joined: Apr 2016
Posts: 291
Hampton Hill, Middx.
DavidR Offline
Learner Plates Off!
DavidR  Offline
Learner Plates Off!

Joined: Apr 2016
Posts: 291
Hampton Hill, Middx.
Nick, just a thought do you usually use the same brand of fuel?

A google search throws up either the effect a rich running engine has on the catalyst when the engine is cold or mould in the aircon, but I would expect that to be more constant rather than throttle sensitive.


David
Aero S4
Re: Ammonia smell.. [Re: NickCW] #579090
31/05/19 10:40 PM
31/05/19 10:40 PM
Joined: Feb 2016
Posts: 1,466
Buckinghamshire
NickCW Offline OP
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NickCW  Offline OP
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Joined: Feb 2016
Posts: 1,466
Buckinghamshire
Interesting question as I usually always run on Shell V-Power 99ron, however currently I am on holiday in the Malverns and the local station is a BP, so have been running it on 97ron ultimate.
Air con was off and is clean so no smells there, how odd..


Aero 8 S1
M3W - Green Shark

"What we do in life.. echoes in eternity."
Re: Ammonia smell.. [Re: NickCW] #579096
01/06/19 01:23 AM
01/06/19 01:23 AM
Joined: May 2017
Posts: 843
auckland new zealand
W
waikiore Offline
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waikiore  Offline
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W

Joined: May 2017
Posts: 843
auckland new zealand
Interesting stuff, as I often have a smell of burning - like a just lit match, very worrying when I first bought this car and thought the woodwork was on fire but after very thorough checking nothing has changed and it still occasionally does it ?


99 plus 8 indigo
Re: Ammonia smell.. [Re: NickCW] #579111
01/06/19 08:44 AM
01/06/19 08:44 AM
Joined: Mar 2009
Posts: 7,373
Hampshire
Alistair Offline
Smile, it confuses them
Alistair  Offline
Smile, it confuses them
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Joined: Mar 2009
Posts: 7,373
Hampshire
There is a lot of cow poo on the roads in that region. Are you certain the locals have not left a deposit on your cat's which is being burnt off ?

I had that in the area around RAF Coningsby where I got a load of cwap on the exhaust/pipes. The smell was quite strong but made worse on full power moments as the pipes got hotter.

I ended up putting it up on axle stands and jet blasting (very very carefully!) down the pipes.


Just time to burn a little more petrol before dinner.
Re: Ammonia smell.. [Re: Alistair] #579125
01/06/19 12:09 PM
01/06/19 12:09 PM
Joined: Feb 2016
Posts: 1,466
Buckinghamshire
NickCW Offline OP
Has a lot to Say!
NickCW  Offline OP
Has a lot to Say!

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Posts: 1,466
Buckinghamshire
Originally Posted By Alistair
There is a lot of cow poo on the roads in that region. Are you certain the locals have not left a deposit on your cat's which is being burnt off ?

I had that in the area around RAF Coningsby where I got a load of cwap on the exhaust/pipes. The smell was quite strong but made worse on full power moments as the pipes got hotter.

I ended up putting it up on axle stands and jet blasting (very very carefully!) down the pipes.


Now this is an avenue I did not think about! Quite possible and would explain why it was worse on full throttle.
I shall have to get the hose out when I am back, to be honest it needs it with a week of bug splatter and rain! drive

Last edited by NickCW; 01/06/19 12:09 PM.

Aero 8 S1
M3W - Green Shark

"What we do in life.. echoes in eternity."
Re: Ammonia smell.. [Re: NickCW] #579205
02/06/19 07:25 AM
02/06/19 07:25 AM
Joined: Mar 2009
Posts: 7,373
Hampshire
Alistair Offline
Smile, it confuses them
Alistair  Offline
Smile, it confuses them
Talk Morgan Guru

Joined: Mar 2009
Posts: 7,373
Hampshire
Stick it up on a kwik-twit ramp and walk under very carefully!


Just time to burn a little more petrol before dinner.
Re: Ammonia smell.. [Re: NickCW] #579404
03/06/19 12:58 PM
03/06/19 12:58 PM
Joined: Feb 2016
Posts: 1,466
Buckinghamshire
NickCW Offline OP
Has a lot to Say!
NickCW  Offline OP
Has a lot to Say!

Joined: Feb 2016
Posts: 1,466
Buckinghamshire
Soft hat at the ready!


Aero 8 S1
M3W - Green Shark

"What we do in life.. echoes in eternity."
Re: Ammonia smell.. [Re: NickCW] #579496
03/06/19 08:42 PM
03/06/19 08:42 PM
Joined: Jan 2009
Posts: 4,796
howard Offline
Part of the Furniture
howard  Offline
Part of the Furniture

Joined: Jan 2009
Posts: 4,796
A cat has been sleeping on your warm bonnet and has peed on the engine.

Re: Ammonia smell.. [Re: howard] #579508
03/06/19 09:40 PM
03/06/19 09:40 PM
Joined: Jul 2011
Posts: 1,946
Kent & Dorset, UK
twotribes Offline
Talk Morgan Enthusiast
twotribes  Offline
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Joined: Jul 2011
Posts: 1,946
Kent & Dorset, UK
Originally Posted By howard
A cat has been sleeping on your warm bonnet and has peed on the engine.


Is that what your Lotus dealer used to tell you? - do Elises still smell of trimethylamine/urea - or as a boat owner, did you not notice the smell of fibreglass? boat


Stuart
"There's no skill substitute like cubic inches."
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