[Fast_Ashley]

I'm ditchin' the wastegate, what do I do with the solenoid and the wire harness?? Can I just unplug it, tie off the pigtail, And ditch the solenoid? Will it set a de-fuel code??

 

[skylinedan]

It'll proble throw a code and SES light, I could go and find out for you, I was just about to get out the Solus and check my HPOP presures whille I'm going down the road. I want ot see if I have a soft code for the IAH sence I took that off Thursday night after work.

Dan

 

[skylinedan]

It won't throw a hard code , so no light. You'll have a soft code in the memory just like the one you get when you take off the IAH, I just unpluged mine to see what would happen, so you should be fine other than having the soft code in memory.

Dan

 

[Fast_Ashley]

Thanks Dan-O:ford:

 

[ELKHUNTER]

Are you guys talking about the EBPV and not the Turbo waste gate????

 

[Fast_Ashley]

Are you guys talking about the EBPV and not the Turbo waste gate????

Negative, we are talking about the wastegate solenoid.

 

[ELKHUNTER]

No offense, but what wire harness plugs in to your waste gate solenoid, mine is operated by boost pressure through a hose.

 

[Fast_Ashley]

The green and red vac. hoses run up to the solenoid(on the intake spyder), and there is a electrical connector that plugs into the solenoid.

 

[ELKHUNTER]

What is tha, a sensor of some sort??? What does it sense in relation to the wastegate???

Curious, I believe that may be the only sensor I dont know about.

Thanks

 

[skylinedan]

Your waste gate is vacume operated, On the intake hose before the turbo you'll see a green plastic line which goes to a solinoid on the front of the spider. from there a red plastic line running to the waste gate on the turbo.
If your interested in removing the waste gate, just pull the red line off the waste gate put it on a Ic boot clamp near it. The problem with doing this is you will make your drive preasures at the turbo higher than 1 to 1 which is bad for the turbo they say.

Dan

 

[ELKHUNTER]

I got ya now, I had no idea the PCM had control over the waste gate, I thought it was operated by manifold pressure alone. It is operated by pressure and not vacuum.

 

[CSIPSD]

Mine has been gone for years... Just unplug it and throw it away...

 

[ELKHUNTER]

Can we revisit this little solenoid or what ever it is, for my own personal knowledge if nothing else. I was looking at it and the wastegate actuator line (red) is tee'd into the spider and then to this unit along with the green line that dumps in pre turbo. What is this thing, I cant find any info on the web, but it looks like a dump valve to me.
Who can explain it to me?

Thanks

 

[gregrob]

Elkhunter, that is the wastegate actuator.
The red line is conncted to the Y pipe and feeds boost to the wastegate actuator.

The actuator moves the rod and opens the wastegate and relieves excess boost pressure into the turbine housing of the turbo and out the exhaust.

Google up 'wastegate' if you want to read more. I'll look around.

 

[JMS1]

The wastegate control solenoid (WGC) I believe is what you may be referring to. The PCM will control the boost pressure by duty cycle to the solenoid, not allowing more than 16.5 psi (as per the 7.3L diesel powertrain control / emissions diagnosis service manual). In the de-energized state the valve is in the closed position. When pressure is supplied on the red hose and the solenoid is closed the pressure will go to the wastegate actuator. This will cause the wastegate to open as the pressure in the red hose over comes the existing preload of the wastegate actuator and thus dumping boost. However if the map sensor sends the PCM an input that reflects low or no pressure the pcm will duty cycle the solenoid open and allow the pressure in the red hose to divert to the air inlet to the turbo. This would leave me to believe if you have some sort of boost fooler the map sensor and the pcm will never see an excess boost condition and therefore the pcm will duty cycle the WGC solenoid open continually. This being the case it stands to reason that the solenoid is currently serving no regulatory purpose. I have my wastegate adjusted for 28 psi boost, when I removed the solenoid it effectively changed nothing.

 

[ELKHUNTER]

JMS1 thanks, that was what I was looking for.

gregrob, I new what the actuator was, thanks anyway.

 

[sttstroke]

Why would you unplug it my truck don't run as good when I unplug the red line., and is really weak on bottom end with a trailer.

 

[NWSUPRD]

I disconnected mine for a bit. It was recommended that I use a big head type actuator. So Woodman put one on and adjusted it as tight as he could. I have hit 35lbs now withour WOT. Spools up much faster and can hold more boost. With your TN I would think you would do well with the same type actuator.

 

[sniperonhigh]

The actuator moves the rod and opens the wastegate and relieves excess boost pressure into the turbine housing of the turbo and out the exhaust.

Just so you all know, the wastegate is actuated and operated by boost pressure. It does not, however, relieve or in any way dump boost pressure. The wastegate bypasses excess drive pressure (read as exhaust gasses) around the turbine wheel to slow the turbo down and thus reduce or maintain a steady boost pressure. oke:

 

[gregrob]

thanks for picking that apart for me and correcting me.