Turbo problem I think
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Junior User
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Turbo problem I think
95 PSD.
Not sure I am describing this right but here goes.
Last year started the truck and it had no power. I would describe it as if the exhaust was plugged up. Turned it off and started it up again. All has been good since. Recentley I have noticed when I start it up and take off there is a momont where it feels the same way and then it goes away. Does this thing have a waste gate (or whatever it is called) in the turbo that is not opening as it should or is this normal. If not what can I do? I'm driving to CO. with the boys over spring break and am kinda concerned about it.
Thanks
Not sure I am describing this right but here goes.
Last year started the truck and it had no power. I would describe it as if the exhaust was plugged up. Turned it off and started it up again. All has been good since. Recentley I have noticed when I start it up and take off there is a momont where it feels the same way and then it goes away. Does this thing have a waste gate (or whatever it is called) in the turbo that is not opening as it should or is this normal. If not what can I do? I'm driving to CO. with the boys over spring break and am kinda concerned about it.
Thanks
Postmaster
Joined: Jan 2004
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From: Kearney, Nebr
There is no waste gate on the OBS trucks. It sounds like your EBPV is closing. Does the exhaust make a loud hissing sound while its doing this? What are the temps? Does it do it when its warm and cold? Need a little more information, but I would guess it's your EBPV sticking.
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Junior User
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It does it when its cold. I cannot say wether it gives a hissing sound because it only last for a second or two. It doesnt do it all the time but it feels the same as if you started out in second gear. What is a EBPV?
Postmaster
Joined: Nov 2006
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From: somerset KY
exhaust back pressure valve. shuts for faster warm up. good when working proper, a booger when not working right. unplug it and it will be fine. you dont want to chance it shutting while on the highway.
Postmaster
Joined: Jan 2004
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From: Kearney, Nebr
Look right infront of the turbo, on the impeller side. You will see a two wire clip there. Right next the the driver side valve cover.
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Junior User
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I see it. When does the valve "kick-off". Is it controlled by pressure. I let it run a minute or so before I leave to get oil everywhere. But, definatly not long enough for the motor to warm up.
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Postmaster
Joined: Jan 2004
Posts: 3,207
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From: Kearney, Nebr
The EBPV is controlled by oil pressure. It turns off when the oil temp reaches a certain temperature. I can't remember the exact temp but I think its somewhere around 120?
Thus, it takes a long time to get your oil temp that high let alone up to operating temperature.
Also, the valve will open once you hit a certain rpm and will close again once it goes below that desired rpm/back pressure.
Most people on here have them unplugged besides they stick or they become annoying. Some even have them rigged up for an exhaust break.
Thus, it takes a long time to get your oil temp that high let alone up to operating temperature.
Also, the valve will open once you hit a certain rpm and will close again once it goes below that desired rpm/back pressure.
Most people on here have them unplugged besides they stick or they become annoying. Some even have them rigged up for an exhaust break.
Postmaster
Joined: Jan 2004
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From: Kearney, Nebr
The reason why people unplug it is because they have a tendency to stick, and that it can come on when you don't want it to. I.e. going down a hill make cause the back end to slide out on slick surfaces because it works like an exhaust break for the engine.