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bpu699 bpu699 is offline
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Join Date: Apr 2007
Location: wisconsin
Posts: 2,539
Originally Posted by T77911S View Post
the fuel pump flow rate is measured out of the return side of the fuel head, IE the amount of fuel returning to the tank. dont worry about rechecking.

above 3k the O2 sensor is no longer used and it goes into open loop.

your control pressures are really high. 75 psi (5.1bar) . this will lean things out.
55 (3.75bar) is better. control should be 3.75bar.
I know it should lean things out...but I am running rich/good...

I will check the mesh in the WUR today if I get time.

I am wondering if there is any way that I can be measuring this "wrong", but I don't see how...

I did have one thought last night, but haven't had a chance to check. I wonder if the HF tester screws in further into the WUR that another brand, therefore blocking part of the passage?

Based on how the car drives, and the AFR's, they seem reasonable (except idle with the 02 pugged in). With a control pressure of 55-75, I would think it should be crazy lean. It isn't...

Thanks for the comment, more to come...

Old 11-12-2014, 11:00 AM
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