2G Why doesnt this car have a boost controller hooked up.

[Brian O Conner]

I helped my buddy buy a 1995 Eagle Talon TSI. The car had problems when we got it that the owner did tell us. He also I guess bought it back in 2021 already modified. He was very unknowledgeable and supposibly never worked on the car but use to drive it around. It was a 1g 4g63T and tranny swapped in this car supposibly.On the test drive it would shut off randomly but did idle good. When we trailered it back to my house we worked on it the following day. I found a boost leak on the throttle body gasket which ended up being broken and had a washer wedged in between??? The car has a 30 inch intercooler,megan racing horn tube turbo manifold, stock bov, stock wastegate and a stock td05 turbo. There was no aftermarket boost controller but had 2 stock boost control solenoids that werent hooked up to anything??? The Bov was hooked up to the intake manifold and the wastegate was hooked up to the intercooler pipe right before the turbo compressor/housing??? I am a 420a guy and none of our boys have ever done this odd set up. The car did run better after we fixed boost leak but had no power. My question is why somebody would hook a car up like this.

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[pauleyman]

bov and turbo are not 2g stock. Those are 1g parts. How do you know wastegate is stock? You mean wastegate actuator? Also not stocck as that is not a stock 2g turbo. It's a td05 variant. Would need information to know. Wastegate line does not hookup to piping before the turbo inlet. Are you sure that's how it's hooked up?

 

[19Eclipse90]

Those pictures are terrible quality. Very hard to see much of anything.

A boost controller is not required. Connect the nipple on the J-pipe (nipple on pipe going to intercooler) to the waste gate and it’ll run waste gate pressure.

The BOV is connected correctly.

 

[Brian O Conner]

bov and turbo are not 2g stock. Those are 1g parts. How do you know wastegate is stock? You mean wastegate actuator? Also not stocck as that is not a stock 2g turbo. It's a td05 variant. Would need information to know. Wastegate line does not hookup to piping before the turbo inlet. Are you sure that's how it's hooked up?

Yes for a fact the internal wastegate is hooked up to that pipe.

 

[pauleyman]

Yes for a fact the internal wastegate is hooked up to that pipe.

If the gate actuator is hooked into the turbo inlet pipe the gate will never open.

 

[Brian O Conner]

Those pictures are terrible quality. Very hard to see much of anything.

A boost controller is not required. Connect the nipple on the J-pipe (nipple on pipe going to intercooler) to the waste gate and it’ll run waste gate pressure.

I was out on the road and my buddy took the pictures I agree they are definitely terrible. I will post better ones today now that I am back home. Yes the internal wastegate is connected to the intercooler pipe inches from the turbo housing. So its suppose to hook up that way? Also your saying this set up can regulate the boost without a boost controller or Boost control solenoid? Just making sure.

 

[pauleyman]

I was out on the road and my buddy took the pictures I agree they are definitely terrible. I will post better ones today now that I am back home. Yes the internal wastegate is connected to the intercooler pipe inches from the turbo housing. So its suppose to hook up that way? Also your saying this set up can regulate the boost without a boost controller or Boost control solenoid? Just making sure.

You're still not clear. Is the wastegate hooked up BEFORE or AFTER the turbo?

 

[Brian O Conner]

You're still not clear. Is the wastegate hooked up BEFORE or AFTER the turbo?

Its before turbo. I took the pictures this time instead of my buddy.

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[19Eclipse90]

Its before turbo. I took the pictures this time instead of my buddy.

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Your second picture - this is “after”. The J-pipe, connecting to the hose running to the intercooler, is after the turbocharger. This is fine.

Doing this means the turbo runs the lowest boost pressure it can with the model of waste gate currently installed.

There are (4) solenoids in the engine bay: fuel pressure solenoid, waste gate solenoid, evaporative emissions purge control solenoid, and EGR solenoid. All but the waste gate solenoid are on the firewall. The waste gate solenoid should be underneath the air intake pipe (A-100).

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The MAF is not connected in one of your pictures. Might figure that out.

I imagine the mess at the throttle body is because they didn’t have an elbow, only a tee. So the leg with the screw in the end is simply blocking off the third leg of the tee. The leg not going to the throttle body or blocked off Is probably going to a boost gauge inside the cabin. If you want to connect everything properly, refer to Taboo speed shop vacuum diagram and removal for 1g and 2g for the original diagrams.

 

[pauleyman]

Just curious where you're getting you're information about solenoid location? Resources page here is full of information.
You have a 2g trans. That rusty looking thing in the lower left corner is the counterweight on the shift lever. 1g doesn't have this.
That braided line needs to be moved. It will eat through stuff like a saw blade. Secure and/or move it or wrap it.

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