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Limp mode loss of power 05 plaste

  • Cornthwaite
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22 May 2020 15:39 #222671 by Cornthwaite
Limp mode loss of power 05 plaste was created by Cornthwaite
I've got a 05 plate jimny that has a intermittent power loss issue, it suddenly loses power but will still run ropie if i pull over and turn it on anf off a few times it revs up and away i go...at mot it failed its emissions but they kindly passed it:) its had a new lamba sensor because that wasnt working.any ideas anyone..thanks in advance

Mark

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22 May 2020 17:23 #222675 by Scimike
If you have a new Lambda and it still failed emissions it suggests a possible fault with the catalytic converter (CAT). I would expect a possible CO fail on emissions, but with a fail on HC as well if this was the case. Don't know why it has a power loss unless the CAT is blocked. I assume you don't have any warning lights on when you loose power?
Mike

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  • Cornthwaite
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22 May 2020 17:27 #222676 by Cornthwaite
Replied by Cornthwaite on topic Limp mode loss of power 05 plaste
no warning lights or engine light no codes, did have but it said was the air flow so changed that still doing it but now no codes on reader

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22 May 2020 17:48 #222678 by Cornthwaite
Replied by Cornthwaite on topic Limp mode loss of power 05 plaste
it can do it when its cold or hot on a short run or longish run. inbetween doing it it runs fine but i do think it has lost some pulling power.

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  • Lambert
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23 May 2020 04:28 #222695 by Lambert
As above this sounds like a catalytic matrix disintegrating and causing a significant flow restriction.

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23 May 2020 07:30 #222714 by kirkynut
Get a cheap code reader if it's a twin cam (soft tops of this era might have a single cam) and check for codes, then report back.

Given the severity of the problem with no engine management light I'm in the blocked Cat camp too.

When this happens the exhaust can't escape, so from your suck, squeeze, bang blow, it can't blow, so there's no room for it to suck into as that space it still occupied by the exhaust gas that should have been blown. In effect its choking itself.

Kirkynut

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