Help:lots Of Smoke Inside Cab!!! - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 12-27-2007
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Help:lots Of Smoke Inside Cab!!!

Finally got around to getting my 1990 beater on the road. Put a new windshield,tags,insurance today. Drove great to and from work then.....I stopped at a local lube then left to go home. Did not get 20ft from there when smoke pored out of my AC vents and filled the cab in 10 sec. Pulled over,I thought it was on fire but found nothing. My heat was on low so i started back home ( i was 1/4 mile from home) when it started again. It smells like a barn fire smoke and so do i now. I shut it off again to check and again nothing. I turned the heat off and hauled a$$ down my road and got home. Dont do it when the vents are off. Im thinking heater core but ive never seen one smoke that much. What do yall think?
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Old 12-27-2007
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More likely the blower or the fan resistor. There is a resistor for the fan motor that oculd do that.

Try putting the fan on full out high. If it starts to do it in that situation, it's probably the fan motor. When you have the fan on high, the resistor is bypassed.
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Old 12-27-2007
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it could be a rats nest or something that was sitting on the intake or something.
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Old 12-27-2007
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I just went out and ran it for 5min,not doing it now.....wtf. When it was doing it heat was on low and it was set on defrost. The cab and I smell like burning tree limbs and leafs. John, I tried doing what you said but its not smoking now.

The smoke was coming out of my panel vents when it was on defrost.
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Old 12-27-2007
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You said you got your oil changed? They could have dumped a bunch of oil on your manifolds and it burnt off.

edit: but idk how that would get in the vents.
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Old 12-27-2007
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That could be it actually. It could bleed through the back edge of the hood and get sucked right in the vents.

I like the "Rat's Nest" theory also, lol. Maybe it was an oil soaked rat's nest laying up against your fan resistor, lol...(combine the theories...)
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Old 12-27-2007
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I did not get my oil changed i went up there to see if they do state inspections.

I know what burning oil smells like and that smoke smelled like a brush fire.
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Old 12-27-2007
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If the heater core did blow then wouldn't it smell like anti freeze and had a residue on the vents?
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Old 12-27-2007
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yeah, the smoke would smell very sweet and you would have a puddle on the floor of the truck.
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Old 12-27-2007
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Well check anti freeze fluid its full,cranked it up and looked around,not doing it anymore but now the no air will come out unless the fan is on full out high. Will not work on any other speeds.
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Old 12-27-2007
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I think it was.....the Flux Capacitor!! This is commonly caused by a phase shift in the matter anti-matter injectors.

Sounds like something made its home in your truck while it was parked...
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Old 12-27-2007
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I think Rev's on to something. Look for a neutrino flux next time it happens -- that would be a strong indicator.

That or the smell of leptons (muons don't have an odor...)
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Old 12-27-2007
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ha ha ha....ok serious answers now.
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Old 12-27-2007
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Quote:
but now the no air will come out unless the fan is on full out high
I think John hit it on the nail....fan resistor.
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Old 12-27-2007
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Yep, sounds like it. Nevermind sniffing for leptons then...
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  #16  
Old 12-27-2007
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Yep. The smoke was from your fan speed resistor pack burning up. The reason your fan only works on high now is because there is nothing left to burn.
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Old 12-27-2007
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Will it be safe to drive? I think not turning the heat on will be a good idea. Auto Zone said the 87 rangers were the last years to have flux capacitor installed behind the dash.
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  #18  
Old 12-27-2007
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You can use it. Just use the fan full on, or full off.
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  #19  
Old 12-27-2007
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Quote:
Originally Posted by FireRanger
Yep. The smoke was from your fan speed resistor pack burning up. The reason your fan only works on high now is because there is nothing left to burn.
Hey, Matt. Long time no talk to.
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Old 12-27-2007
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Thank yall,doubt ill fix it anytime soon. I was fixin to blow it up cause i just put 300 bucks in it getting it legal. Still have to buy tires too.
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  #21  
Old 12-27-2007
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The partical sun is returned! Good to see your back John!

Yea, you should be fine to drive. However to be on the safe side, do not set the fan for anything but high or off.
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  #22  
Old 12-27-2007
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Quote:
Originally Posted by FireRanger
The partical sun is returned! Good to see your back John!

Yea, you should be fine to drive. However to be on the safe side, do not set the fan for anything but high or off.

10-4....thanks for everything
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  #23  
Old 12-27-2007
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Quote:
Originally Posted by FireRanger
The partical sun is returned! Good to see your back John!

Yea, you should be fine to drive. However to be on the safe side, do not set the fan for anything but high or off.
Ha ha! And judging from my posts here, sub-atomic particle sun...
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  #24  
Old 12-27-2007
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does anyone know what could of caused it?
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  #25  
Old 12-27-2007
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They just go bad after awhile, Kevin. They run hot as they slow the fan down by getting rid of some of the electrical power as heat. They are mounted in the intake airstream of the fan to keep them cool -- but basically they are a heating element and like any heating element they eventually burn through.

I don't think they're very expensive, and it's like 2 screws to get it out and replace it and a connector that plugs into it. Should be easy.
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