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Breaking up under boost

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Old 09-10-2019, 12:04 PM
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Default Breaking up under boost

I've read all over the forums and I cant seem to find a definitive answer. I've started to have an issue when I get over 8psi, my car begins to stutter. I use to run at 14psi with no issues at all. I've done all the obvious (that I can think of) ie. Checking my over boost protection (set at 16psi) checking grounds, gaping my spark plugs more/just completely changing them (I began with the extended reach ones on flyin miata now to bkr7e plugs.) I would do more however I currently dont have a space to do other work than that. From the logs I dont seem to run lean so i dont think it's a fueling issue, also when I changed the spark plugs it worked for one pull than it went right back to stuttering.

Useful info?
1992 1.6
440cc injectors
Ms2pnp ecu
T28 turbo -14psi
Bkr7e spark plugs - .28

I guess worst case scenario flyin miata is down the street. Maybe one of them will give me a hand.

Last edited by Adust; 09-10-2019 at 12:30 PM.
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Old 09-10-2019, 12:11 PM
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Coils going bad?

Post a log of the event.
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Old 09-10-2019, 12:19 PM
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Originally Posted by sixshooter
Coils going bad?

Post a log of the event.
My AFRs are lean at lower rpms. I had switched back to this map to see if it had something to do with the tune I was using before
Attached Files
File Type: msl
bnbnbnbnb.msl (3.81 MB, 70 views)
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Old 09-11-2019, 12:17 AM
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Coils or bad plug wires is my guess.
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