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What is this? *with pictures*

Printed From: West Coast Fieros
Category: Technical Topics Forum
Forum Name: Technical Questions and Discussions
Forum Description: Got a technical question about your fiero? ask it here.
URL: http://www.westcoastfieros.com/forum/forum_posts.asp?TID=2903
Printed Date: 22 November 2024 at 11:18pm
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Topic: What is this? *with pictures*
Posted By: InfernoFiero
Subject: What is this? *with pictures*
Date Posted: 28 April 2012 at 2:10pm
My car is not working (died on the highway while driving and the temp gauge went off the charts*, and I saw this pipe not connected the next day when i towed it back home and the area in the red square is the place I feel the pipe might have been connected as there is a hole there. What does this pipe do?




Replies:
Posted By: Dr.Fiero
Date Posted: 28 April 2012 at 6:40pm
Originally posted by InfernoFiero InfernoFiero wrote:

What does this pipe do?


It leads to Narnia.  Yes.  Most definitely.

Of course, there's also a slim chance that's it's the hinge for the air door, and not really a tube.  We are looking at the side of a duke air cleaner, right?


Posted By: InfernoFiero
Date Posted: 28 April 2012 at 8:11pm
I too was thinking it could lead to Narnia.

I  read up more info n the air filter, and so i take it that the pipe in the picture is in fact the tubing for the air intake manifold? Whatever it is it completely broken from the base too as I was trying to reattach the top, so I'll try to get a replacement part at NSAP.

Edit: So the symptoms usually entails a loud idle, stalling, cylinders misfiring and the buildup of carbon. This would explain my car stalling, but would this also explain my car dieing while driving because the stalling symptom requires the car to stop?


Posted By: Dr.Fiero
Date Posted: 29 April 2012 at 8:11am
Oh..  were you talking about the small tube facing you, or the larger one pointing down?  That hooks to the exhaust shield (via the flex pipe), and just provides warm air on startup.  Around here it's warm enough it really doesn't do much anyhow. You could remove it and never notice the difference.

Loud idle...  chance are the exhaust manifold is cracked.  They almost all did it.
This lets air in, giving a false lean signal. so the ECM pumps in more fuel.
Then you get the carbon and sooting, and a 'rich mis-fire'.



Posted By: InfernoFiero
Date Posted: 29 April 2012 at 10:17am
I was talking about that aluminum tube facing me in the 2nd picture, so it's not that important then?


Posted By: Dr.Fiero
Date Posted: 29 April 2012 at 4:48pm
Yeah, that aluminum tube (dryer duct!) that goes down to the manifold/exhaust, it would normally go up to the tube sticking out of your air cleaner in the first picture.

When it's cold out, the door in the tube/air cleaner housing opens up allowing preheated air into the throttle body. As the air heats up, the door closes and lets fresh cold air from the outside in.  It's the same thing they've used on carburated engines since the 60's (earlier?).

Anyhow - not that important.  Find that exhaust leak.  20X more important.  If you can't find another manifold, pull that one off and Damien or myself can weld it up probably.




Posted By: InfernoFiero
Date Posted: 30 April 2012 at 5:05pm
You were very helpful, thank you very much!



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