Boost/Fuel Cut problem. need help

Jdizzle659

Member
:
Mazdaspeed 3
So I have been experiencing most likely a fuel cut and I just got my car fixed so I can't compare cold to hot weather conditions. It's about 30degrees outside and I know that in the cold it is more likely for our cars to cut out. I'm really just looking for another opinion on the matter. I've attached a log of the run. Please look it over and let me know what you think. If you can't open the attachment please let me know so I can fix it. thanks
 

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So I have been experiencing most likely a fuel cut and I just got my car fixed so I can't compare cold to hot weather conditions. It's about 30degrees outside and I know that in the cold it is more likely for our cars to cut out. I'm really just looking for another opinion on the matter. I've attached a log of the run. Please look it over and let me know what you think. If you can't open the attachment please let me know so I can fix it. thanks

291.24 99.06 168.8 4169 39.2 0 197.18 74.1 66.49 29.25 52.25 1711.39 19.43 3 0

Your fuel pump is taking a dump. You won't get fuel cut running the accessport, which I assume is how you ran this log and made 21psi. You are making fuel until reaching a greater injector duty/boost/engine speed and your pump can't keep up. This is how my pump ended up after running the accessport for about 2 weeks. Getting the new pump corrected the problem. An AFR of 29.25 @19.43psi right before failure is horrifying. I would stay out of boost until you get a pump.
 
291.24 99.06 168.8 4169 39.2 0 197.18 74.1 66.49 29.25 52.25 1711.39 19.43 3 0

Your fuel pump is taking a dump. You won't get fuel cut running the accessport, which I assume is how you ran this log and made 21psi. You are making fuel until reaching a greater injector duty/boost/engine speed and your pump can't keep up. This is how my pump ended up after running the accessport for about 2 weeks. Getting the new pump corrected the problem. An AFR of 29.25 @19.43psi right before failure is horrifying. I would stay out of boost until you get a pump.

That's what i figured. What fuel pump you get? This is my 3rd set of internals from pg.
 
That's what i figured. What fuel pump you get? This is my 3rd set of internals from pg.


I went with the PT-Perfromance pump assembly. I had to pay the core charge up front, but the were really quick getting that back to me when they received my pump. I felt better about them building a pump for me, being that it is their profession, and I have never built a pump. The pump from them has been perfect for me.
 

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