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 Hi from New Zealand 
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 Post subject: Hi from New Zealand
PostPosted: Tue Jan 16, 2018 6:53 am 
Newborn - handle with care


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Hi, new member on here. I have a 1998 Lotus Elise with fairly standard non VVC 1.8 K series. Anyone with any success in trouble-shoooting misfire issues, potentially related to O2 sensor, feel free to drop me a line! I've resurrected an old post which sounds similar but didn't have a solution...
Not much Rover support in NZ so any help greatly appreciated :-)


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 Post subject: Re: Hi from New Zealand
PostPosted: Tue Jan 16, 2018 8:37 am 
RT GOD


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Does it have a distributor.

Doubt it would be a oxygen sensor


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 Post subject: Re: Hi from New Zealand
PostPosted: Tue Jan 16, 2018 10:42 am 
Newborn - handle with care


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Yes, changed the distributor and rotor, plugs and leads but didn't fix this issue.
Misfire is very occasional. Down change with fairly high revs seems to be the trigger. The car appears to go rich, with stuttery gentle acceleration and unable to cruise smoothly on a steady throttle. Full throttle and all is good.
This issue started after I changed exhaust manifold for a 4-2-1 janspeed downpipe with new o2 sensor. I eventually tried unplugging it altogether and experienced no change. I've recently changed it and, while the car seemed to run the same, the problem seemed to go away until it recently had the misfire occur again. Once it starts, it won't go away until ignition is turned off for a minute or so. All is good after restarting.
I've also changed throttle position sensor too. The car appears to be running fine in all other respects except recently it seems more fumey than it used to be, noticeably during engine braking when I get a whiff of fuel. After long drives wirh roof off my clothes now smell a bit of petrol. I'm sure I never used to get this.


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 Post subject: Re: Hi from New Zealand
PostPosted: Tue Jan 16, 2018 1:31 pm 
RT BiKiloPoster


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Is it wetting the plugs?
Are the plugs new and gapped correctly?
leads?
regards
Scott

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 Post subject: Re: Hi from New Zealand
PostPosted: Tue Jan 16, 2018 3:47 pm 
RT GOD


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Are the plugs even in colour? Might be something like one of the injectors is overfuelling making the lambda think something is wrong overall

Drew


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 Post subject: Re: Hi from New Zealand
PostPosted: Wed Jan 17, 2018 7:56 am 
Newborn - handle with care


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Thanks for the comments. Plugs were new but that was nearly 2 years ago ( this has been going on for over 3 now! ). I need to pull them and check gaps and wetness.


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