Ben ev
Member
Registered: 23rd Oct 05
Location: kingslynn / torquay
User status: Offline
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trying to get my car through its MOT but fails on o2 levels. all others are ok. car is a corsa gsi with c20let engine. i changed the lambda sensor and put it back on the gas analizer but tester rekons it has a vacum leak somewhere. tried blanking the small roker cover breather with the one way valve in it but no joy. ive blanked everything with a vacum hose one at a time but still hasnt helped. Boost gauge is reading 21hg on idle which iirc is alittle high?. my other car used to be nearer 30 i think with the engine i am currently using.
is there anything else that would create high o2 level(just over 1.3) or is a vacum leak to blame? cheers in advance for any advice
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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afm can cause similar problems.
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Ben ev
Member
Registered: 23rd Oct 05
Location: kingslynn / torquay
User status: Offline
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would it throw a fault code up dave? this is a possibilty as due to my turbo the loom is extended to the afm on the other side. i have played with this part of the loom since transplanting the engine also which is raising suspisons. would there be a simple way to check readings etc?
also would turning the fuel pressure right down help the o2 level reading in any way?
[Edited on 13-04-2007 by Ben ev]
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