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Author Topic: Back firing adn smoke from my engine  (Read 2543 times)

Offline five0roller

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Back firing adn smoke from my engine
« on: March 17, 2009, 12:45:03 pm »
i purchased an 85 C10.  Great exterior but the engine is giving me problem.  idles very high constantly and then backfires when i shut it off.  There is a hose which runs from the left side of the air filter housing down to the engine which is melted.  I know this may not explain the problem but its the best i can do woithout a picture of it.  The Hose runs to teh exhaust manifold i believe.  I thought this was supposed to be metal.  And would this hose being detatched cause it to melt and would it cause my Idle/backfire problem?
« Last Edit: March 17, 2009, 12:50:08 pm by five0roller »
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Offline VileZambonie

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Re: Back firing adn smoke from my engine
« Reply #1 on: March 17, 2009, 01:03:00 pm »
Post a pic. The stove pipe is metal. Do you have a.i.r.? Pix would really help. Check for vacuum leaks.
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Offline 406 Q-ship

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Re: Back firing adn smoke from my engine
« Reply #2 on: March 20, 2009, 01:45:05 am »
Sounds like just a high idle speed to me, reset the idle speed to about 700-800 RPM.  I bet the backfiring you are hearing is the engine run-on.  The hose you describe is the fresh air for crankcase ventalation, if it is in that bad of shape I bet the vacuum hose aren't doing that well either.......replace them all too (cheap insurance).
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