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beepbeep beepbeep is offline
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Join Date: Jun 2001
Location: Sweden
Posts: 5,560
Negative on turbo. If turbo is so worn that there is "gas going from hot to cold side" you would notice it in much more spectacular fashion. There is a bearing in-between lubricated with hi-pressure oil film. Once that lubrication is gone, turbo is trash within seconds.

Remember, as long as you aren't leaking something out of the system, all air sucked into engine is going trough CIS first. So even if BOV piston is stuck or leaking, everything is going trough CIS, is metered and fuel is dispatched accordingly.

Thus: you still have good-old CIS fueling problems. WUR, control pressure, cone steepness...the usual.

Do you have wide-band lambda? If nothing else helps, you might try to strangle the cone on low-load part. Thus manually "map" the leanness from the low-load region.

Remember, CIS doesn't know about turbo...it just feels the air sucked trough it. It delivers same amount of fuel regardless if you boost or not, as long as it's feeling the same flow trough it. Only way to "map" it is to to modify cone or to use digital WUR or such.

Frankly, you could use Megasquirt connected to one injector, in order to "bleed" fuel from control-pressure and voilá, you can map it any way you like. MS costs 200 bucks and you are a handy man
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Last edited by beepbeep; 07-27-2008 at 02:53 PM..
Old 07-27-2008, 02:46 PM
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