waste gate

[gr8chef@comc]

I do not have any boost. Could the cause be a waste gate stuck in the open position? The turbo is good with no shaft play.

What else could cause this. I am going to be replacing the cracked exhaust manifold ( thanks to indiana Dave ) What else could I try?

thanks fellas

[cobra0478]

Is the actuator rod still connected?

[gr8chef@comc]

yes, that was the first thing I checked...
believe me it seems a lot easiers to work on my older stangs.

[SVOeric]

I have a hard time believing that your older stangs are easier to work on-- just a little different knowledge needed to get done what you are after.

You should take the clip off the actuator rod, and make sure the flapper will actually move -- they have been known to get stuck ..

Can you give us a little more info on when the boost stopped working ?

you should check the hoses and boost controler itself (also -- what year is your car -- 84-5, and 85.5-86 have different boost controlers.

[gr8chef@comc]

I purchased the car a about 7 months ago and the owner told me
the car had no boost. I have a new turbo, manifold and actuator.
I did not check to see if the flap on the waste gate was not stuck.

When I get home today I will check. My car is an early 84 with the upgraded turbo ( i guess it was converted at some point ).Where is this boost controller and how easy is it to replace?

Thanks

[jayG]

The boost controller is on the right front of the fender beside the breather housing. It will be a cylinder a/b 1 3/4" tall and 1" in diameter and is mounted on a triangle plate. there will be two wires coming from it, one red and one yellow. there will also be two hoes' at the top on a "T" connector. If the controller is bad just replace it with a Ric Gillis adjustable controller, its only $40 and will allow you to turn the boost up a couple more pounds.

[SVOeric]

a 84 will have a boost controler (2 hoses connected to a little round thing) on the passenger side fender well, just in front of the strut tower. there is also a square box under it, that is the electronic controler for the boost controler.

you should make sure it has some hoses connected to it. -- if they are routed backwards, you get un-regulated boost.

When you are driving the car, does it feel like you have boost? -- is it possible that maybe just the boost gauge isn't working ?

You may also want to check that the turbo still spins freely