Miata Turbo Forum - Boost cars, acquire cats.
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Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   MEGAsquirt (https://www.miataturbo.net/megasquirt-18/)
-   -   MSM MSPNP Pro Stock Injectors Leaning out @ 9psi. Stock ECU Fine (https://www.miataturbo.net/megasquirt-18/msm-mspnp-pro-stock-injectors-leaning-out-%40-9psi-stock-ecu-fine-100992/)

rhombus 09-02-2019 12:56 AM
Originally Posted by curly (Post 1547540)
So your voltage correction is wrong? You may want to check that.
No, it was correct. The fuel pump was weak requiring higher voltage to maintain pressure.

rhombus 09-02-2019 01:02 AM
Update and resolution.

Replaced the fuel pump and Im now able to tune afrs for the 11s all the way to redline at <90% DC @ 10.5psi. Problem was a weak fuel pump. I put in a DW200. Thanks for everyone's help!

18psi 09-02-2019 11:31 PM
Originally Posted by 18psi (Post 1547384)
its probably losing fuel pressure
Originally Posted by rhombus (Post 1547675)
Update and resolution.

Replaced the fuel pump and Im now able to tune afrs for the 11s all the way to redline at <90% DC @ 10.5psi. Problem was a weak fuel pump. I put in a DW200. Thanks for everyone's help!
:likecat:
I'm starting to see more and more weak/dead pumps these days. I'm guessing age is finally catching up to these cars

DNMakinson 09-03-2019 11:19 AM
Originally Posted by 18psi (Post 1547743)
:likecat:
I'm starting to see more and more weak/dead pumps these days. I'm guessing age is finally catching up to these cars
And you were correct. It was also interesting to me the compounding issue with improper MS3 Pro alternator output voltage setting.


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