 soot on the intake runners |
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| VaccaRabite |
 Mar 4 2020, 07:33 PM
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#1
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En Garde!  Group: Admin Posts: 13,456 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region  |
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I'm not getting a lot of work done on my car this winter. Its been so mild I keep driving it every time I open up the garage to work on it. I'm getting oily soot on the outside of my intake runners, clearly burping out from the joiner hoses at the manifold. Why is it there, and is it something that I need to be concerned about? Zach |
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| Krieger |
Mar 5 2020, 09:07 AM
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Advanced Member Group: Members Posts: 4,723 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None 
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Idk the numbers for the pressure changes that is experienced by the intake system, but it is all over the place. From idle with a good amount of vacuum to deceleration and the throttle plate closed with a larger amount of vacuum. Then there is also a reversion pulse when air is flowing back from the intake valve, under certain circumstances, toward the plenum. Just change those big hoses, or maybe clean up the soot and put some big zip ties or clamps on the hoses to see if the problem is eliminated.
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Posts in this topic
VaccaRabite soot on the intake runners Mar 4 2020, 07:33 PM
Bleyseng Is the engine backfiring? Mar 4 2020, 10:03 PM Krieger You have a wire unhooked. How old are those hoses... Mar 4 2020, 10:10 PM
VaccaRabite
You have a wire unhooked. How old are those hose... Mar 5 2020, 07:15 AM JamesM
http://www.914world.com/bbs2/uploads_offsite/live... Mar 5 2020, 10:21 AM Olympic 914 It would seem that a leak in one direction would a... Mar 5 2020, 02:59 PM |
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