I have a 1994 NA Miata which was turboed about 7 months ago everything was professionally done but a performance company in my area.
for about 2 months now i have not driven the Miata because of an idle issue i have been having which both scares me on the road and shuts off my car sometimes aswell.
i have recently checked for vacuum leaks (none) cleaned the throttle body which as a result did nothing again. i have mega squirt in the car, if learning mega squirt is the best thing to do here to really hit the pin on the head here i will read the forum on that and get to it.
i uploaded a video maybe one of you have had the same issue with idle. anything would help thank you in advance. i just found out about this forum site and i will definitely be lurking around here because i really do love Miata's and im curious to see how all of your builds are going.
this is a picture

 

Welcome. What are your plans for the car?

There is a section for tuning questions. There you can also upload your tune, and some logs of the problem.

 

i plan to make it to 300 Hp before 2022 i have a rb28dett turbo that im going to replace with the cx racing one that i have in at the moment. soon i will be redoing the paint color because i didnt prep it well enough before painting it. next real upgrade is going to be better coilovers im embarrassed to say what i have on right now but i will be fixing that when i get the money for it. other then that i am sticking to the soft top and going to weld diff and really just see where the miata takes me

 

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I hope you don't. There are ready options to source and use a limited slip in these cars. Unless you are drag racing it only, I think this is a pretty bad idea, since it will give you a large amount of understeer. In which case, why waste money on better coil overs?

As for your idle problem, it sure sounds like a vacuum problem. If you do not have what you need right now to download the tune and post it, then I think you should go back to the shop that installed it. They can probably identify the problem fairly quickly.

 

I don't know, but have been told that welded diffs on IRS means broken something is on the horizon. I believe the general statement was that welded diffs were for solid rear end vehicles like old Mustangs.

 

It's hard on the CV joints at it loads them in both directions when turning. Some people have no issues, some people go through axles like there's no tomorrow. My , get an LSD and skip the welder. Or weld it and driftbro. it's your car

 

Isn't that supposed to rhyme, and be related to a march...

"I don't know, but I've been told, that welded diffs don't grow old"

 

Thank you, pretty funny, have a cat...