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Old 14-06-2019, 08:45 PM   #1
Caprobbo
Fordluva
 
Join Date: Dec 2010
Posts: 105
Default AU2 XR8 EFI Problems

The Windsor is chewing the fuel again
Replaced the 02s 2000ks ago when it had the same problem
That seemed to 95% cure it

Now a couple of years later its back to running rich and hunting at idle again
As soon as it switches to closed loop the fuel trim heads skyward, in open on a cold start they start at 18% then fall to 3% till the ecu switches to closed.

The first vid shows how the trims react on a warm start up ,on cold start they drop to 3%

Can someone who knows this system have a look at the two YouTube vids and give me an opinion, Thanks Bret.

https://youtu.be/32EKs5Tnen0
https://youtu.be/JaYz8f5UuNQ

Also disregard the Forscan vids on YouTube, that was from last time (4yrs ago)

Last edited by Caprobbo; 14-06-2019 at 08:55 PM. Reason: add more info
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Old 15-06-2019, 02:37 AM   #2
crakrz
T3 TE50 Blueprint
 
Join Date: Apr 2005
Posts: 934
Technical Contributor: For members who share their technical expertise. - Issue reason: Craig has shown and shared an outstanding amount of knowledge in the field of Tuning. Craig is only to happy to share with anyone that asks his knowledge on the EEC tuning system, in particularly in the use of Moates Quarterhorse and Binary Editor. 
Default Re: AU2 XR8 EFI Problems

Your second video shows one of the O2 sensors switching even when the engine is off. It should go full lean at key off. What brand of sensor are used in the videos.
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