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-   -   1990 1.6L G28 Turbo Tune Help (https://www.miataturbo.net/megasquirt-18/1990-1-6l-g28-turbo-tune-help-90659/)

matrussell122 10-04-2016 01:16 AM

Currently this is where im sitting. did some more logs tonight. Im almost possitive its a spark issue. going to check all my grounds tomorrow and also change the plugs to a BKR7E and gap to .030 to see if that helps. I have boost control turned off in the tune to eliminate that from the issue. Doing some shorter pulls around my house i was able to build 6psi boost before any cutout. when it cuts out the rpm has a slight drop for just a second like the ecu is losing power.

matrussell122 10-04-2016 01:17 AM

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matrussell122 10-06-2016 02:04 AM

Checked all groundsn and all are good n tight. and replaced plugs and gapped to .035. engine still sputters like a fuel or ignition cut. kinda lost on this. What could make it sputter like an ignition cut?

pakmx5 10-06-2016 02:54 AM

Your boost control cutoff is 150kpa so I'm guessing anytime you hit 6psi/150kpa there is a fuel cut. Adjust this number to slightly higher than your planned boost

edit: confirmed by looking at logs. PW drops off as soon as you hit 150kpa.

matrussell122 10-06-2016 09:02 AM


Originally Posted by pakmx5 (Post 1365653)
Your boost control cutoff is 150kpa so I'm guessing anytime you hit 6psi/150kpa there is a fuel cut. Adjust this number to slightly higher than your planned boost edit: confirmed by looking at logs. PW drops off as soon as you hit 150kpa.

I was thinking something similar but my boost control is turned off would it be in a different table?

matrussell122 10-06-2016 12:17 PM


Originally Posted by matrussell122 (Post 1365669)
I was thinking something similar but my boost control is turned off would it be in a different table?

I'm dumb I'll do that tonight and get some new logs up here. Will get my boost solenoid in this weekend hopefully


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