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How should I adjust the turbo precontrol actuator rod?

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Old 11-04-04 | 07:24 AM
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WaLieN's Avatar
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Thumbs up How should I adjust the turbo precontrol actuator rod?

I need to shut mine so that my primary builds a little faster (it isn't building proper boost in neutral and it is a little slow in building full boost on the primary -- https://www.rx7club.com/3rd-generation-specific-1993-2002-16/sequential-owners-can-any-you-make-4psi-neutral-364327/).

I recall seeing a thread where it said to adjust it so that 3/4 of the pin that the rod goes onto is showing, but I don't recall which 3/4 (towards the car, or before?). I tried searching, but I couldn't find the thread that I saw before. If anyone of you guys remeber that thread or has a pic of a properly adjust TCA rod, please post it. Also, how exactally should I adjust the rod? I think I have an idea of how to do it (take off the c-clip and the rod from the pin, then twist it at the end w/ pliers so that it gets shorter then use the pliers to pull it back onto the pin, correct?), but I am not 100% clear; the last thing I would want to do is to goof up this $400 actuator.

Thanks guys. Hopefully, after this my sequentials will be working at 100%. (a step by step would be greatly appreciated -- below is a pic of the rod so that you can reffer to)

Attached Thumbnails How should I adjust the turbo precontrol actuator rod?-complete-turbos-2-medium-.jpg  

Last edited by WaLieN; 11-04-04 at 07:39 AM.
Old 11-04-04 | 07:39 AM
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From: Miami - Given 1st place as the POOREST city in the US as per the federal government
Well if you notice, the flap opens up more and more as the rod is pushed out. If you were to turn the tip inward, it would thread close to the actuator thus closing more the flap.

Some people around here may suggest connecting a Home Depot valve to the actuator itself. I had originaly tried that but didn't get much results.

The thing is VERY sensitive. Don't think turning a bit now and thats it will do you good. You are gonna have to drive it several times before you have it at where you want it.

Old 11-04-04 | 07:43 AM
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How exatally do I adjust the end of the rod though? Is there a jam nut or do I just freely turn the end of the rod with a pair or pliers?
Old 11-04-04 | 07:49 AM
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https://www.rx7club.com/showpost.php...1&postcount=11 has a picture.

According to Vanditmar, both actuators should have a 1/2 hole of stretch. When adjusting, First hit the threaded end with some PB blaster. Then I used some super-strong gripping vise-grips to hold the actuator rod while I turned the end with a wrench. Just don't allow the torque to twist the workings inside the actuator. They can be a little seized.

Dave
Old 12-16-04 | 01:59 AM
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I finally got around to tackling this job, but I've hit a wall. The rod won't budge at all. I've hit it with so much penetrating oil but it still won't budge. I was thinking of just removing the actuator and working on it on my workbench. Any suggestions on alternative solutions?

Last edited by WaLieN; 12-16-04 at 02:02 AM.
Old 12-16-04 | 06:37 AM
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I took the actuator off and adjusted it; that thing was seized pretty bad. I had to use a table vice grip to keep it in place. Man, 8 hours of work for just that one little rod.
Old 12-16-04 | 07:08 AM
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i know what you mean, when you are doing something big and you get stuck on some dumb ****.
Old 12-16-04 | 07:53 AM
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well at least its a very very very good thing that you have it off the car.... damn... its a pain in the *** to get to it when the turbos are in the car.... kekekeke.
Old 12-16-04 | 01:07 PM
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Originally Posted by WaLieN
I took the actuator off and adjusted it; that thing was seized pretty bad. I had to use a table vice grip to keep it in place. Man, 8 hours of work for just that one little rod.
Unfortunately pretty normal considering the continual heat those components get exposed to over time...
Old 12-16-04 | 02:30 PM
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I got the play by play on AIM last night, but did you drive the car yet today?

Sonny
Old 12-16-04 | 06:44 PM
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Originally Posted by Sonny
I got the play by play on AIM last night, but did you drive the car yet today?

Sonny
I finally got a chance to test it out; I was grinning from ear to ear and yelling out joy mixed with profanity. My GF couldn't stop laughing from all the profanity-mixed phrases I was yelling out. For once, my sequentials are working just right. I can now make 10psi by 3krpms. One thing though is that the transition is dipping down to ~7psi, but it shoots right back up to 10psi in a second [and the 1" hose that goes to the ABV (BOV for those you wish to call it that) has a slight crack on it, so I should be able to spool even faster once I get that replaced]. Oh well, I'm done messing with them for now.

I don't know if any of you have been following my journey towards a working sequential system, but it has been a long and arduous one. Though, the reward of a fast-spooling sequential turbo system is worth the cut hands, verbal blasphemy, and showers that leaves a black residue in your bathtub. For those of you who have a troublesome sequential system, I highly reccomend you don't give up and go non-sequential. The feeling you get when you actually fix everything in that complex maze of a sequential control system is amazing.
Old 12-16-04 | 10:35 PM
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a little confused>?

did you adjust the turbo pre-control actuator or the turbo control actuator rod?
Old 12-16-04 | 10:58 PM
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Originally Posted by ORX705
a little confused>?

did you adjust the turbo pre-control actuator or the turbo control actuator rod?
The rod.
Old 12-17-04 | 01:24 AM
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Good job
Old 12-17-04 | 03:02 AM
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Originally Posted by adam c
Good job
Thanks Adam! Man, it spools so fast now!
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