i can get the psi to go down just not up do to the fact that it spools so slow i am never hitting peak boost like i should. do you think my wastegate acutator could be broken

 

i can get psi to go down just not up do to the fact my turbo is spooling slow. it never peaks like it should

 

I've had an issue with only making low boost before, but that was because my intercooler piping kept coming loose. I got rid of the garbage garden hose clamps and went with some heavy duty T-clamps

http://www.siliconeintakes.com/produ...1c341ae8c918db

Might be a completely different issue, but just make sure all your intercooler pipes are good and solid.

 

EDIT: See post 21 below.

 

Take a look at your wastegate flapper, sometimes they get cocked sideways or jammed open.

N

 

I will share sparky's holy grail: First, Remove the heat shield from your exhaust manifold. Now disconnect your MBC. Your MBC has two hoses connected to it. Disconnect the two hoses not at the ports on the MBC body but instead disconnect the first hose at the WGA and disconnect the second hose at compressor discharge tube.

Run a new length of 4mm rubber hose directly from the WGA nipple to the nipple on the compressor discharge tube. So, now the actuator diaphragm will receive the boost signal directly from the compressor J-pipe. Secure the ends of this control hose to the nipples with hose clamps or zip-ties.

Loosen the backup nut that secures the WGA's turnbuckle onto the threaded tip of the actuator rod. Remove the cotter pin that holds the turnbuckle onto the peg on the pivot arm of the flapper valve.

Using a large flat-bladed screwdriver pop the turnbuckle off from the peg on the flapper valve's pivot arm. Next, rotate the turnbuckle so that it adjusts to the length where the corresponding hole in the turnbuckle flat freely slides on and off of the peg on the flapper valve's pivot arm. Reinstall the turnbuckle onto the peg on the flapper valve's pivot arm.

Now, take the car out for a spin and check boost on your boost gauge in 4th gear at WOT. You should get a reading somewhere between 10-12 PSI. Is this so?

Park the car. Allow sufficient time for the exhaust manifold and the turbine housing to cool back down again. Once again, pop the turnbuckle away from the pivot arm and readjust the turnbuckle by rotating it inward clockwise four complete 360 degree turns. Reinstall the turnbuckle onto the flapper arm and take it for a spin again. Boost should be up around 16-17 PSI. Is this not so?

Once you get boost up to this 16 PSI level, then repeat process but with smaller 180 degree half rotations of the turnbuckle testing after each half rotation until you get the preloaded WG spring pressure up to 17-18 PSI. Now, you can reconnect your MBC and use it to make the final adjustment up to your desired peak boost level.

Tip: There are some secret tools for adjusting the spring preload on the cramped WGA location. You may find that these come in handy. At Sear's in the tool dept., they sell a set of tiny ignition wrenches that are open-ended with offset angled heads. They are American Standard but there is a size that fits the backup nut on the turnbuckle perfectly. These wrenches come as a set and as I said are tiny and come in a small plastic pouch. They are called ignition wrenches and are relatively inexpensive. I think that in the old days they were used to make adjustments on distributors(what's that?). Check them out.

Hope this helps.

 

i got it fixed the actuator rod on the wastegate was loose and vibrated the hole bigger. a couple twistes on the rod to bring back tension and did the trick. thanks for the help and the ideas the helped alot