boost problem ????

[99Smokin73Stroker]

Yeah I haven't done anything about that to my map sensor yet. Sometimes if I crank up my TS chip it will set off the ses light so I might have to get that too..

[Veggie-Destroyer]

im not sure what im talking about
but
could it be that the mo mo is getting the wrong amount of vac. use hands check and there no leak or obstructions . or like what happened when.... after the superchip or after the new waste gate . i would read boost w both clogged and open vac . just to compare what happens .

for me to fix somthing i just think and go look at the last thing i touched and bam that's the prob.

[99Smokin73Stroker]

I wish it was always that easy!

[Ramsmoker]

I'm confused about the waste gate actuator. The feed line is in the intake tube which has vacume in it from the air reshing by. That line goes to a switch that I think the PCM controls. The line going out of the switch goes on the waste gate actuator. So how come i'm told that the waste gate is pressure actuated by a internal action in the turbo. Does the actuator push or pull? This seams so simple when I'm under the hood but I have to know how exactly this work's.

[purduefarmboy460]

Don't forget too that if you put in one of them relief valves, you have to have your boost gauge tapped into the horn on the turbo to get acurate readings, if not, you'll only read 21 psi or whatever it dumps at....

Anybody know anything more about grounding out the map sensor? that would be cheaper than buying the relief valve...

How about those little tubes they have at blackcloud, that you put on the end of the wastegate actuator, those do any good, 3-4 psi maybe? if so, what would it take to make our own?

[bradfordboatworks]

Originally Posted by Ramsmoker

I'm confused about the waste gate actuator. The feed line is in the intake tube which has vacume in it from the air reshing by. That line goes to a switch that I think the PCM controls. The line going out of the switch goes on the waste gate actuator. So how come i'm told that the waste gate is pressure actuated by a internal action in the turbo. Does the actuator push or pull? This seams so simple when I'm under the hood but I have to know how exactly this work's.

the accuater push's buy means of boost from the solenoid buy the intake elbow. that,s why when disconnected you have higher boost levels, until pcm defuels. on another note any ideas what could be causing my 10 psi problem???? only gettin 10 psi unless i disconnect accuater hose then sometimes goes to 25-30 then but no more power when it does get the boost. only ses light for overboost

[Ramsmoker]

This is still confusing to me. I was out and followed my disconected system today to help out on another site. The supply tube hooks up between the air box and the turbo. There is no pressure in there. A whole bunch of air movment which lead me to believe the passing air created a vacume. Then the solinoid is triggered by the PCM to relieve the pressure. Will the waste gate open by itself with hi boost?? Is there any other mechanism in the turbo or petistal to open the waste gate without the intake line hooked up?? I took the waste gate off my truck's a long time ago. I have never noticed any defueling or waste gate operation. I have seen over 40psi boost. That was scary. Anybody want to jump in here would be great. The more the merrier. Thankyou to the boatworks for your quick responce. Bill

[mschn99]

ill email ya some stuff to help ya out bill........

[mschn99]

Originally Posted by bradfordboatworks

the accuater push's buy means of boost from the solenoid buy the intake elbow. that,s why when disconnected you have higher boost levels, until pcm defuels. on another note any ideas what could be causing my 10 psi problem???? only gettin 10 psi unless i disconnect accuater hose then sometimes goes to 25-30 then but no more power when it does get the boost. only ses light for overboost

i would guess a bad wastegate controll valve, a bad controll selenoid, or a cracked line to one of the above........just based on what i know now.

[mschn99]

here are the possibilities and a description



Plugged green wastegate hose or port in the charge air intake to the turbo
Wastegate control solenoid not electrically but mechanically inoperative
Wastegate actuator
Wastegate valve
Wastegate turbo
Intercooler hoses leaking
A wastegated turbo is designed to reach maximum boost sooner then a conventional turbo, but overboosting will cause damage to the turbo. The PCM will control the boost pressure by duty cycle to the solenoid to maximize boosting performance. When pressure is supplied on the red hose going to the actuator (solenoid NOT energized) the valve will open, dumping boost. When low or no pressure is on the red hose going to the actuator (solenoid is being energized) the valve will stay closed.
l our posibilities and a description of operation