1990 mspnp2 t3 turbo back fire at 5krpm - Miata Turbo Forum -Boost cars, acquire cats.

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Old 09-05-2016, 04:51 AM   #1
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Default 1990 mspnp2 t3 turbo back fire at 5krpm

Having trouble with anything past 10psi suppose to have a 14psi wastegate with no controller. Im not to intelligent when it comes to tuning the mspnp2. I'm currently on my phone at work (night shift) I have a tune file.and data long read to send to whomever is willing to take a look at it first thing in the am. I have 800cc injectors and a 340lmp.fuel pump stock fuel rail and regulator.
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Old 09-06-2016, 02:31 PM   #2
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Please post the MSQ and data log.
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Old 09-06-2016, 03:34 PM   #3
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Post them. Probably overboost.
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Old 09-08-2016, 11:49 PM   #4
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Twas overboost protection.. now my afr are wacky wide band harness been pliced in multiple spots! Was on car when bought. Should I just buy new harness or hole new wideband?? Aem ugeo is what I have..
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Old 09-09-2016, 08:28 AM   #5
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you should switch overboost to fuel only or fuel&spark.
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