North American Turbocoupe Organization



Applying Pressure to WGA
philS Offline
Senior Member
#1
The circlip holding the wastegaste rod to the flapper has vanished! So the turbo will not make any boost.

I've read some of Pete's other posts about applying 10 psi to the vac port on the WGA. I need to do this in order to get the WG rod to move a little farther out in order to match up the rod hole with the flapper. But how? I can't really get my air compressor down to 10 psi. I could use one of my bike pumps, I suppose, but with what kind of adapter?

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86 TC, 73 Mini, 72 Mini Van project (w/ LS-1 motor)

Click here to beat a ricer.
Did you hear about the Lucas powered torpedo? It sank.

86 TC, 73 Mini, 64 Mini Van, Saturn wagon
Click here to beat a ricer.
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Keith Nubel Offline
Posting Freak
#2
I would just use one of hand pumps for vacuum or pressure. You should be able switch from one to the other. You need to make sure the wastegate is free before you test the actuator.
1985 TC
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philS Offline
Senior Member
#3
Thanks, I do have a hand vac pump, but I didn't know it was (if it is) reversible.

The wastegate is free - I can turn the flapper door no problem.

No boost bites!!!!

Although too much can be a problem. The other day I went to pass someone on the highway, and the throttle plate in the throttle body stuck open at WOT. So I was making 20 psi, and I ended up in the back seat practically.

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86 TC, 73 Mini, 72 Mini Van project (w/ LS-1 motor)

Click here to beat a ricer.
Did you hear about the Lucas powered torpedo? It sank.

86 TC, 73 Mini, 64 Mini Van, Saturn wagon
Click here to beat a ricer.
Reply

Pete D Offline
Administrator
#4
Did you find out why the throttle plate stuck open? Some things I have heard or experienced are the return spring broke or out of position, linkage hung up on the ignition wires, gas pedal hung up on the floor mat.
Pete Dunham


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philS Offline
Senior Member
#5
Pete,

I thought it might be the linkage, so I oiled all that and it still stuck. I removed the throttle cable bracket on the upper intake so the spring was not involed, and it continued. There was a lot of buildup inside the TB when I removed it to do the valve cover, so I thought that was it.

Now after letting the oil work itself in for a week or so, I can pull the throttle plate all the way open and it won't stick.

I cut back the floor mat when I found it was keeping my clutch pedal from full travel.

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86 TC, 73 Mini, 72 Mini Van project (w/ LS-1 motor)

Click here to beat a ricer.
Did you hear about the Lucas powered torpedo? It sank.

86 TC, 73 Mini, 64 Mini Van, Saturn wagon
Click here to beat a ricer.
Reply

philS Offline
Senior Member
#6
Giddy up, the boost is back.

Keith, you were right. I switched over to pressure on the vac pump and I was able to move the rod enough to reconnect the wastegate.

I used a 5/32" c-clip from Home Depot. Seems to be holding fine.

------------------
86 TC, 73 Mini, 72 Mini Van project (w/ LS-1 motor)

Click here to beat a ricer.
Did you hear about the Lucas powered torpedo? It sank.

86 TC, 73 Mini, 64 Mini Van, Saturn wagon
Click here to beat a ricer.
Reply





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