[urq] Sudden lean running 10v

[Brandon Rogers]

No good answers here - just a few thoughts...

Did you do the t-belt - off a tooth?

Do you have a local "neighboring" car that you can compare all your
electrical connections?

Have you re-adjusted or checked freq valve duty cycle on the DMM? 

Brandon 
 
 


-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On Behalf
Of Mike Del Tergo
Sent: Tuesday, June 21, 2011 6:38 PM
To: urq at audifans.com
Subject: [urq] Sudden lean running 10v



Ihad the engine pulled last fall to clean up the engine department and drop
in my rebuilt rack. Finally got a chance to play around with it after the
engine went back in and had a lot of electrical connections to correct that
the wrench was not sure of.  I have had an O2 in it for some time with an
AFM.  Car starts fine cold and hot, and shows correct very rich on cold
start.  It would always go to full rich under firm acceleration.  Now after
the engine pull, I barely get mid range AFR and dreaded pinging if I goose
it.  Car will slowly rev past 4K so IAT switch seems fine.  Hwy cruise is
fine.  Both throttle switches show on/off functionality so I am at a bit of
a loss.
Ideas? 		 	   		  
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