Why is there hissing and black smoke from under the front end??
Thread Starter
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Being Evaluated
Joined: Feb 2010
Posts: 1,905
Likes: 15
From: Buffalo, NY
That would blow nuts. The IC and lines look fantastic; great shape. Could that be why mu truck is sloooow? I mean, compared to my '99 psd 7.3 6spd this thing feels like an auto 4cyl honda
Thread Starter
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Being Evaluated
Joined: Feb 2010
Posts: 1,905
Likes: 15
From: Buffalo, NY
Ok guys did some investigating. There is some device mounted right in front of the alternator or some electronic device (just got out of shower.. cant think of what it was) down low, drivers side, closest to the fan.. it has a vac line coming out of it towards the drivers side fender, then there is a 90* angle on it, and it's sucking air. Nothing attached to it.
About 6" from that line, there is a larger diameter harder clear plastic line just hanging out that goes up somewhere into something along the firewall..
About 6" from that line, there is a larger diameter harder clear plastic line just hanging out that goes up somewhere into something along the firewall..
Thread Starter
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Being Evaluated
Joined: Feb 2010
Posts: 1,905
Likes: 15
From: Buffalo, NY
Ya I was thinking about snapping pics but figured you guys would know what I was talking about. I dont think it's the alternator (pretty sure its not) I just cant think of what the heck that was right behind it. I'll have to check again tomorrow. Is that where the vac. pump is located? Drivers side, lower part of motor, few inches from the fan?
Diesel Bomber
Joined: Aug 2007
Posts: 1,525
Likes: 79
From: Livingston Montana
Ya I was thinking about snapping pics but figured you guys would know what I was talking about. I dont think it's the alternator (pretty sure its not) I just cant think of what the heck that was right behind it. I'll have to check again tomorrow. Is that where the vac. pump is located? Drivers side, lower part of motor, few inches from the fan?
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Being Evaluated
Joined: Feb 2010
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From: Buffalo, NY
Yes thats it!! What is that line thats capped off? Because on my truck there is a 90* facing the firewall and the line is cut going to nothing! But then 6"-12" from it, there is a hard plastic clear line (thats dirty) going upwards to the top-rear of the motor...
See above
See above
Diesel Bomber
Joined: Aug 2007
Posts: 1,525
Likes: 79
From: Livingston Montana
Thats the vacuum line for everything on the truck. Mine's capped because I don't need it. Trace back from your brake booster, figure out where it was cut on that end, then re attach it to the pump.
Thread Starter
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Being Evaluated
Joined: Feb 2010
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From: Buffalo, NY
Interesting!! So there will be a main hookup line on the brake booster? Thats why my hvac and cc dont work then? Why do my brakes still work though (
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And I've come to the conclusion that the black smoke under the front end is oil from my front cover leak. Mystery almost solved!!
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And I've come to the conclusion that the black smoke under the front end is oil from my front cover leak. Mystery almost solved!!
Last edited by 85_305; Mar 10, 2010 at 07:37 AM. Reason: Automerged Doublepost
Diesel Wrench
Joined: Apr 2008
Posts: 634
Likes: 18
From: Tulia, TX
are your brakes hard to push? if so it needs vacuum to the booster if not there is a T in the middle of that main line coming out of the vac pump and that is where the smaller plastic line connects to
