1.6 Na miata turbo idles at 4k rpm
#1
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hey there, im helping my friend try to get his 92 1.6L running with a ebay turbo kit. we have the whole kit installed, a MS1, 440cc injectors from an rx-8. and the exhaust is dumping off the turbo through the roof. We have it just on a base map at the moment with no MAF sensor, and no afm. first issue we ran into was with the TPS (non VTPS), we replaced, and put it back in place. once we have the tps adjusted the car starts and holds its rpm at 4k right off the bat and doesnt show signs of coming down as the vehicle warms up. Any ideas on what could be wrong? im including a couple data logs aswell.
#3
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Did you ever figure it out? Having same issue with a buddies miata, we've tried tuning the iacv, unplugging the iacv in total, and it still revs and idles to 4k solid.
I wanted to assume vacuum leak somewhere but we've triple checked the intake manifold, intercooler piping, and even smoke tested it.
My FM turbo miata did the same thing, but tuning the iacv fixed it right away. This one is just weird.
I wanted to assume vacuum leak somewhere but we've triple checked the intake manifold, intercooler piping, and even smoke tested it.
My FM turbo miata did the same thing, but tuning the iacv fixed it right away. This one is just weird.
#6
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Did you ever figure it out? Having same issue with a buddies miata, we've tried tuning the iacv, unplugging the iacv in total, and it still revs and idles to 4k solid.
I wanted to assume vacuum leak somewhere but we've triple checked the intake manifold, intercooler piping, and even smoke tested it.
My FM turbo miata did the same thing, but tuning the iacv fixed it right away. This one is just weird.
I wanted to assume vacuum leak somewhere but we've triple checked the intake manifold, intercooler piping, and even smoke tested it.
My FM turbo miata did the same thing, but tuning the iacv fixed it right away. This one is just weird.
And doesn't like to rev higher if under more than 5psi boost.
The 1.6 also has idling issues, but not as severe. Yet it won't go more than about 5psi before bogging down under full throttle.
If, however, we just lightly press on the gas, it will go up to about 7 PSI before bogging back down to about 4000 RPM.
I would love to figure out what this problem is, because it would fix two cars at once!
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Silver NB
MEGAsquirt
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06-28-2020 01:30 PM