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Discussion Starter · #1 ·
Anyone know anyone that knows how to tune a 4g69? The one I have is running great but is having a lag issue. Was wondering if a tune would help it, in both the computer side and mechanical side( a friend said he could help me with the mechanical) I want to tune the computer so I could get it running better on the performance side. (Ik the car isnt terribly fast but any gain is good)
 

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Discussion Starter · #5 ·
The mechanic issue is just my exaust manifold leak. I have to get a new gasket and new downstream bank 2 sensor.
What codes are you throwing? And how do you know it's leaking? You should replace your sensors first before getting a tune.
It throws a code for the bank 2 sensor and p0401, the cats are dirty. Ik I have an exaust leak cous the previous owner had the manifold checked and the mechanic forgot a bolt on the manifold.
 
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