running 1.8 throttle body with 1.6 wiring? MSPNP - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-24-2015, 04:17 AM   #1
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Default running 1.8 throttle body with 1.6 wiring? MSPNP

i have a 1990 miata and i am going to swap a 1996 1.8L engine into it. I will be running a 90-93 mspnp and i was wondering if i can keep the 1.8 tps and throttle body or would I have to get an adaptor plate and run my 1.6 tps and throttle body? thanks
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Old 09-16-2015, 02:11 PM   #2
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Keep the 1.8 TB. Snip the electrical connections from a 1.8 harness for the TB and IAT and wire like so.

The IAT plug wires were the same colors in my experience.

That should do it.


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running 1.8 throttle body with 1.6 wiring? MSPNP-80-s0ynn_3ed72c56faece600481ac35a1ec3a9a466b849da.jpg  
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Old 09-16-2015, 07:56 PM   #3
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After some garage testing today, I'm pretty sure the wiring order in that picture is incorrect.
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