GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: DubAndDubber on 23 July 2013, 18:47
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Fitted my decat a few weeks back and didn't sort out the lambda issue.
What do I need to do to remove the EML?
I've read that some kind of spacer does the trick, or washers?
Any help would be great.
Thanks
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get it mapped out. i now if you use a spacer on the agu pre cat sensor the car runs very lean.
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I have an AUM. Already had a map too.
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get it mapped out. i now if you use a spacer on the agu pre cat sensor the car runs very lean.
You shouldn't need to space a pre cat :undecided:
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I had decat on my agu was fine..no lights nothing :undecided: as for aum map it out
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I'm hoping Dom will come along and help me out...
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I'm hoping Dom will come along and help me out...
You called? :grin:
I'm lucky in that my decat hasn't thrown the EML on. You have 2 options, first is to have it mapped out, second is to space the post-cat lambda, not the pre-cat one as has been suggested.
The pre-cat one controls fuelling, post-cat just checks that the emissions are within an acceptable range and isn't really needed. By spacing the post-cat sensor it will read the emissions to be lower than they actually are, therefore in most cases preventing the EML from coming on.
Something like this...
http://www.ebay.co.uk/itm/LAMBDA-O2-OXYGEN-SENSOR-BOSS-EXTENDER-SPACER-FOR-DECAT-FROM-HIGH-GRADE-STEEL-/161046047401?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item257f17aaa9 (http://www.ebay.co.uk/itm/LAMBDA-O2-OXYGEN-SENSOR-BOSS-EXTENDER-SPACER-FOR-DECAT-FROM-HIGH-GRADE-STEEL-/161046047401?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item257f17aaa9)
I'd check the thread is correct before buying though, use your cat if you still have it :wink:
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get it mapped out. i now if you use a spacer on the agu pre cat sensor the car runs very lean.
You shouldn't need to space a pre cat :undecided:
i had to on my agu because the 3" straight through Exhaust system i brought from the US had the lambda sensor hole on the downpipe too close to the fire wall so i had to buy a 90 degree spacer which in turn caused it to run very lean.
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get it mapped out. i now if you use a spacer on the agu pre cat sensor the car runs very lean.
You shouldn't need to space a pre cat :undecided:
i had to on my agu because the 3" straight through Exhaust system i brought from the US had the lambda sensor hole on the downpipe too close to the fire wall so i had to buy a 90 degree spacer which in turn caused it to run very lean.
It will have been running lean due to the false reading, was it a cheap decat? I'm running a 3" one from the US and had no such issues.
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Thanks Dom! I remember reading through your dub rides section, but I wasn't searching through it to find out :grin:.
Thanks for that, the car isn't driving bad, if anything it's better. But that bloody light drives me nuts!
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mk4 aum with decat, i have the right angle spacer on after cat and no light, no codes. engine runs a lot smoother and i have noticed better MPG though dont know if thats a combination of hot weather as well. managing 150 miles a week with 2/8ths of a tank used only :smug:
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get it mapped out. i now if you use a spacer on the agu pre cat sensor the car runs very lean.
You shouldn't need to space a pre cat :undecided:
i had to on my agu because the 3" straight through Exhaust system i brought from the US had the lambda sensor hole on the downpipe too close to the fire wall so i had to buy a 90 degree spacer which in turn caused it to run very lean.
It will have been running lean due to the false reading, was it a cheap decat? I'm running a 3" one from the US and had no such issues.
when my car went for custom mapping at rtech i had to have the lambda sensor hole moved on my downpipe because the 90 degree spacer was giving false readings causing the car to run lean.
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I have cable tied my post cat sensor to the subframe and left the blanking plug in the decat. No lights yet.