Never seen this before...
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Master of Strokes
Joined: Mar 2007
Posts: 6,808
Likes: 25
From: CA
Never seen this before...
Working on a 2000 7.3. It has what I thought was really bad turbo surge just rolling down the freeway with the cruise set at 70. It tunes out that the waistgate solenoid is opening and closing over and over and over. With the key on but engine off you can hear it opening and closing and it won't stop. Checked the MAP sensor and its showing 14.3 while the EBP sensor is showing 14.7. Was going to replace the MAP sensor anyways cause the plastic tab that keeps the plug locked onto it. None the less when I unplug the MAP sensor the waist gate solenoid keeps cycling. Do you think the waist gate solenoid is being told to do that and the issue is else where or its acting up its self? Was going to see what the voltage being fed to it is does any one know what I should be seeing with the key on engine off as far as volts go?
Laughing Gas
Joined: Oct 2012
Posts: 872
Likes: 18
From: Jasper, Mn
Is it your waste gate opening and closing or the EBPV? The stock waste gate has no computer control, so I am inclined to believe it is the EBPV. Look at the oil and air temps if you can, I believe one of these is used in the control scheme for the EBPV.
Baatzy
Baatzy
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Master of Strokes
Joined: Mar 2007
Posts: 6,808
Likes: 25
From: CA
No it is the Waitegate controller opening and closing for sure it is not the EBPV opening and closing that sounds like a jet. This is the solenoid mounted on the Spider that has the red and green lines running to it.
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Master of Strokes
Joined: Mar 2007
Posts: 6,808
Likes: 25
From: CA
It might but why is it opening and closing is what I can't get over. Its electric since the truck isn't running when its doing it and there is no boost running through it. Literally sounds like a solenoid opening and closing.
BTW thanks for again for waiting with me at RRE after leaving leaving Bens place waiting on Corey to uhhh "help" me
BTW thanks for again for waiting with me at RRE after leaving leaving Bens place waiting on Corey to uhhh "help" me
Elder User
Joined: Jul 2015
Posts: 914
Likes: 4
That green solenoid is controlled by the PCM, but all it does is to send a regulated amount of boost pressure (via the red plastic line) to the wastegate controller (the mechanical/spring diaphragm thing) to help force it amount quicker then spring pressure alone. Many people disconnect the red line, to prevent premature opening of the wastegate.
BUUTTTTT, you're saying the wastegate itself is cycling open/closed with the truck SHUT OFF?
That is physically impossible. With the truck shutoff, there is no airflow through the turbo, and certainly no boost pressure ( or more accurately, exhaust back pressure/drive pressure) to open the wastegate.
Unless your truck is possessed by the ghosts
of Powerstrokes past
, something isn't adding up.
Did you check to see if the rod from the wastegate controller is still hooked up to the wastegate arm on the turbo?
BUUTTTTT, you're saying the wastegate itself is cycling open/closed with the truck SHUT OFF?
That is physically impossible. With the truck shutoff, there is no airflow through the turbo, and certainly no boost pressure ( or more accurately, exhaust back pressure/drive pressure) to open the wastegate.
Unless your truck is possessed by the ghosts
of Powerstrokes past, something isn't adding up.Did you check to see if the rod from the wastegate controller is still hooked up to the wastegate arm on the turbo?
Lead Driver
Joined: Jun 2004
Posts: 6,315
Likes: 582
From: Amarillo, TEXAS!
Pull the red line off the waste gate actuator and drive it. If the symptoms don't disappear, the waste gate control solenoid is eliminated as the cause.
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Post Fiend
Joined: Mar 2007
Posts: 26,966
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From: Texas
Still trying to comprehend how this would be possible. Have you visually or by touch verified the wastegate rod is moving and actually opening and closing the flap?
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Master of Strokes
Joined: Mar 2007
Posts: 6,808
Likes: 25
From: CA
Im talking about the wastegate SOLENOID, not the physical waistegate moving. You can hear it clicking on and off on and off. Just to recap with the key on and engine OFF the waist gate its self is not moving but on the freeway going 70 the solenoid is still turning on and off which is causing the waist gate to open and close. Yes is you unplug to red line it goes away but I still wanted to get to the route of why its doing that.
Lead Driver
Joined: Jun 2004
Posts: 6,315
Likes: 582
From: Amarillo, TEXAS!
When the waste gate control solenoid is powered (active) it is sending less pressure to the waste gate actuator. It's normal for it to be active KOEO and under low boost conditions. It is controlled by a duty cycle percentage, like the IPR is. The lower the duty cycle, the less pressure it's sending to the actuator.
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Master of Strokes
Joined: Mar 2007
Posts: 6,808
Likes: 25
From: CA
This is the only truck I have ever seen that clicks it on and off constantly while the key is on with he truck running. My 7.3 does not do that
When the waste gate control solenoid is powered (active) it is sending less pressure to the waste gate actuator. It's normal for it to be active KOEO and under low boost conditions. It is controlled by a duty cycle percentage, like the IPR is. The lower the duty cycle, the less pressure it's sending to the actuator.
Elder User
Joined: Sep 2011
Posts: 979
Likes: 4
From: Vancouver
How old are your batteries? A battery that has internal problems will still often start and run, but can cause strange electrical events.
Also loose or corroded grounds.
I have had two vehicles with battery problems -when I replaced the batteries, problems went away.
Also loose or corroded grounds.
I have had two vehicles with battery problems -when I replaced the batteries, problems went away.
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