jamesw
Member
Registered: 28th Jun 02
Location: Station Town, County Durham
User status: Offline
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Last night it blew off when i was on way home, managed to limp home (didnt know what had happened at the time). Anyways had suspected where it blew off may have been leaking for some time, as car hasnt been hitting correct overboost and holding well etc. So have put it back on and and tight, car now overboosts as it should and holds mint. HOWEVER now the damn thing is running lean (which it never has done). Im wondering, has the ECU tried to be clever when i was limping home as car was running extremely rich and tried to adjust the map to compensate, im right in thinking the ECU changes the map yes? Or maybe my lambda could be well clogged up now? Its strange if i take it easy when i apply throttle, no problems, holds 1 bar and afr is spot on, same as if i take it easy till ive got a few psi on then floor it, again no problem, its only when theres no boost and i floor it, goes extremely lean, mainly causing problems when i change gear. What people think?
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jamesw
Member
Registered: 28th Jun 02
Location: Station Town, County Durham
User status: Offline
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Damn thing, have left battery off for an hour, and done a heater and free air calib on my lambda - same problem, @ tickover just touching the throttle dam thing plummets from 16 ish to 17 - 18. Used to be mint before, would sit between 13 and 14, and on any revs or boost go rich 
[Edited on 10-08-2006 by jamesw]
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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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what are you using to test lambda output?
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jamesw
Member
Registered: 28th Jun 02
Location: Station Town, County Durham
User status: Offline
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innovate xd1 digi gauge, came with the lambda
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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accurate stuff then, it is running lean. plugs ok??
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jamesw
Member
Registered: 28th Jun 02
Location: Station Town, County Durham
User status: Offline
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will have a bit more of a check tonight, took battery off last night - will connect it back up when i get in.
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jamesw
Member
Registered: 28th Jun 02
Location: Station Town, County Durham
User status: Offline
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still the same, gonna check the plugs today, cant see it being this tho, as surely the lambda would still pickup the unburnt fuel
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jamesw
Member
Registered: 28th Jun 02
Location: Station Town, County Durham
User status: Offline
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Just noticed something else, whenever i had any revs on previously boost gauge would change from vacumme to 0 - now the vacumme drops nearlly gets to 0, then get vacumme back again - gonna check all the joints i have on the air intake / turbo
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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check all the vacume pipes etc, sounds like you have an air leak somewhere after the afm.
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