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Discussion Starter · #1 ·
Got a used 557p ecu off . Just installed it along with my origonal working stock injectors and stock fpr.

Car started up perfect and idled fine for a minute . Then got a cel ( car was still idleing perfect.) tried giving a tiny bit of throttle and when I let off the cars idle became irratic and came down very slow and then idle started going up and down

Codes
P1136 (system too lean longterm) and p1613


Bad ecu? Or maybe just from all the gas coming out ofthe fue rail .
 

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Discussion Starter · #3 ·
I unplugged battery before I started. Then I did injectors and fpr. And then ecu. Then battery pluged in. And tba .

Then started car. I just took it for a ride and delete d codes. The lean code didnt come back. The other one did.
 

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Discussion Starter · #4 · (Edited)
Found something from the jetta forums and said somthing about softcoding the ecu.. guy told me it was for fwd but coding was still off. I recoded with the lite version(no one could tell me ifn you needed the full version). And cel went away by itself. We will see if it comes back
 
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