forcefed1

OK
I have a unique turbo problem I know they’re all unique. No matter what I try I can not get more then 7 psi on the primary turbo. I have no pill in my lines. My pre control and wastegate solenoids work correctly with voltage applied via a battery. The lines survived a pressure test too. Im trying to up the boost with the PFC and accept for creep I get nothing…
So I tried the home depot valve. I put it after the actuator to simulate the solenoid.
On the precontrol I saw little change…. 7-5-7 creep to 11
When I put the valve after the actuator on the wastegate I got 7 primary then anywhere from 7-15 on the secondary…. After seeing it hit 15 I got off the gas and closed the valve all the way. This resulted in 7-5-7 just like before.

So I think I have eliminated the wastegate and precontrol This can’t be a regular leak but I looked anyway. NOTHING.
How do I raise thee boost on the primary turbo?
Please anyone take some guesses.
I haven’t checked the actuator under the turbos yet. could it be causing low primary boost? And all the rest of the system seem the same?
I can’t imagine it’s the PFC since I took it out of the loop using the valve?

Can anyone please help?

P'cola FD

Try this, hook a boost gauge to the hose going to the precontrol actuator, and come back to tell us what happens. I think that the precontrol solenoid might not be duty controlling(maybe).

forcefed1

OK ill give that a try and see what I find.
If I also remove the bleed off line from this actuator, shouldn't that increase the primary boost?
I figure it has to be one of the actuators since Im seeing 7-8 PSI steady. The wastegate actuator does seem fine. Both wastegate and precontrol solenoids opened when voltage was applied via direct wire from battery.

anyone have another guess/test I can try?

Wade

iTrader: (1)

If you are putting the valve in the line after the actuator then you aren't going to get what you want. When the valve is totally open, you will be running 7psi because you have no pills. When you close the valves more, it is the same as trying to dial in even less boost with your PFC.

You need to put the valve on the WG before the actuator and get your boost up to about 10psi that way. Then you can use your PFC to move it up and down by adjusting the duty cycles.

After you do this you will probably also need to put a valve in the PC line before the actuator to get your primary boost up.

Wade

forcefed1

so what your saying here.
the primary boost needs a restriction (pill) in BOTH the wastegate AND the Precontrol lines.
Since Im running one with NO pill and the other with the valve, Im not allowing enough air to be bled off by the solenoids.
SO both of these need to be happy for primary boost to raise.

OK ill get another valve and try restricting both lines teh pills should be in.
I suppose the stock pills will also do the trick. Eventually Ill see about using them at least in the wastegate line since I may need more controll over the prespool.

Ill let you know how this helps.

forcefed1

this is mostly so the search function is a bit useful in the future.

I fixed my boost problem last night.
I had one HD valve and it wasn't doing the trick. the owner before me said he had a good boost pattern so I figured you only needed one and no pills. looks like he was running low on primary and then raising the secondary by restricting teh wastegate a bit with the valve.

In order to raise the primary boost and have controll of all boost with the PFC you MUST HAVE 2 PILLS one in both preconrtol and one in the wastegate better yet use the valves.
After installing both valves and about 15 min of fine tuning them I was right in the middle of teh PFC's controll with a very very nice 11-10-11 (and still some creep porting the WG coming up) boost pattern It was great.

If you have a PFC and can't controll boost. Get those stock pills both installed or put in some valves. Now It works great.

This morning it was like 43 deg and I was able to cut the boost back a bit with the touch of a button.... Almost like it was designed to do it that way.

WHAT AN AWSOME CAR!

Rotary93

Put the correct pills back in......

Wade

iTrader: (1)

You can get by without a pill in the precontrol if you want to, but you probably won't be able to get as much primary boost as you'd like.

Sounds like the PC valve worked out for you, glad to hear it.

Wade

JeffShoots

2nd turbo low boost or 1st turbo low?

2nd turbo controlled by pills or controller (valve)

1st turbo can be upped with the actuator rod tightened.

Later, Jeff

Wade

iTrader: (1)

I'd suggest adjusting pills or a valve in the precontrol long before suggesting messing with the actuator rod. If the precontrol rod is adjusted properly (and it likely is, unless someone has been goofing with it) there is no need to mess with it.

Just my opinion, someone else might rather adjust the actuator rod instead. However there IS supposed to be a pill in the PC line, and if it's missing the sensible thing to do would be replace it (or add an adjustable valve in it's place).

Wade

RX7 Rotary Rocket

iTrader: (1)

"1st turbo can be upped with the actuator rod tightened."

I want to know where that rod is please explain me !

Thanks
Carl