mspnp 550cc w/out afm,wont start - Page 2 - Miata Turbo Forum -Boost cars, acquire cats.

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Old 06-05-2007, 09:55 AM   #21
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Im kind of curious as to what is in the PNP wiring to control the FP from the stock ecu plugs? Proprietary? or was it something that is already public....

<-- still has to make his own harness for his MS.... still procrastinating.
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Old 06-05-2007, 11:44 AM   #22
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Most people with DIY setups just jump the AFM connector to run the FP anytime the key is on. For the MSPNP we designed a little transistor circuit to control the FP direct from the ECU.

Thankfully on the 94-95 Mazda came to their senses and started controlling the fuel pump like most other cars... directly from the ECU, and ground switched relay instead of 12v switched...
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Old 06-05-2007, 01:14 PM   #23
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our 96 runs a switched 12V for the FP on standalone cuase we had major relay issues from the previus owners stereo mods etc.
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