Wow, that's really crooked.

Looks like the stud on the wastegate arm got bent. Straighten that out.

If you can, also adjust your can a bit in towards the manifold so the arm is as perpindicular as possible to the stud.

After all that, readjust your preload.

Angles = Binding = Bad

Uck. Fix that right there. Bend the rod or get a new straight arm.

https://www.miataturbo.net/attachmen...517_171617-jpg

Ok. I was able to rotate the actuator arm to get a better angle. It is not perfectly straight, although it looked good from my point of view.

I took a drive and did a few 1-4 gear runs and it never went over 8 PSI according to the gauge in the car. I did not log it.

See the pictures below.

That looks perfect.

I recently installed EBC and I wasn't sure it was working properly because I was getting too much boost and over boost was kicking in.

I reconnected the wastegate signal line like before, directly connecting it from the IC pipe, post-IC, and to the actuator.

I still over boosted. I disconnected the actuator arm from the wastegate arm. I moved the wastegate up and down without any problems. I pulled the actuator arm a few times. It seemed ok.

I reconnected the actuator and wastegate and the arm is tightened three revolutions.

I took another drive and still the boost shoots up until over boost. The hose is brand new; I just bought it for the EBC.

The last two times I was over boosting I was able to adjust the arm properly to correct it.

I think your actuator is finally dead.

Do you have a way to pressurize the wastegate line? Small pump of some sort? You only need 5-10psi (basically, the boost the compressor makes). You're trying to see if the wastegate actuator opens with that pressure.

I thought u said it was working few days ago without the MBC?

Take a pic of the MBC installed for me pls.

It was working before. This is the third time in the last couple weeks that it stopped working.

I do not have MBC. Before I started working on the EBC a few days ago the car ran on actuator pressure only.

I can try and blow on the line to see if that moves the actuator.

So, blowing in it real hard did not do anything. Although, I'm not really sure if it should be possible or not.

LOL. Unless you're a real blowhard, I don't think you can generate the pressure required.

What we're trying to detect is whether the diaghragm in the actuator has a leak. I'm thinking that applying vacuum with one of those hand pumps and seeing if the vacuum is maintained would accomplish this -- but I'm not sure if that's a correct test. Maybe try searching for "wastegate actuator testing" or something like that. Or call BEGI.

Did you rotate the actuator arm relative to the actuator when you were trying to get things lined up better? That's a no-no -- can tear the diaghragm.

Yep.

Although, it had obviously rotated away from the preferred position at some point.

Blowing with ur mouth you wont be able to generate even 1 psi. You need to use a pump.

So is it working with actuator pressure only? Few days ago you said it was after you fixed the angle.

Let me get this right, it was working properly after you fixed the angle just on the actuator pressure and then you added an EBC and its not working any more?

It was working after I fixed the angle. hornetball now says that rotating the arm in the actuator like I did is bad. But it had to be rotated at some point for me to need to adjust it. I probably did it at some point in the last few months by accident.

A few days later I started working on the EBC. Even though the EBC was open, I was still overboosting.

I connected the signal line back the way it was before, directly to the actuator. The EBC is not involved at all right now. I am still over boosting.

I disconnected the actuator arm and wastegate arm. I confirmed that the wastegate can move up and down. I pulled the actuator arm a few times to see that it moves. I connected the actuator and wastegate. The actuator arm is 3 tightened three revolutions.

I am still over boosting. The actuator is not opening soon enough, or at all.

I will see about hooking up a pump.

Well man i'd get a new wastegate and call it done.

wastegate, or actuator ?

Actuator. Might as well get one for the correct psi you need. Get one made for 10 psi or whatever you want... not one made for 6 psi that will work for 10 psi by extending or shortening a rod like the ones begi sells.

gotcha, thanks again!

I put my new actuator in tonight and it seems to have solved the issue with the wastegate not opening.

Below is a log of a few pulls and it holds pretty steady under full throttle between 152 - 154 kpa.

Now I can get back to the EBC!

Wow! What a difference.

Yeah, a big difference. I put two runs together into one image.

The top half is when I thought the actuator was still working correctly. The bottom half of the image is from tonight after installing the new actuator.

No sag and nice and straight.