DynoDave
CO-ADMINISTRATOR
Motown Mopar-Wizard
Posts: 11,169
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Post by DynoDave on Apr 1, 2014 8:02:32 GMT -5
Make vacuum leaks hiss-tory Curing deadly engine vacuum leaks OCW |
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Post by odzking on Apr 1, 2014 8:45:57 GMT -5
Great article
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Deleted
Deleted Member
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Post by Deleted on Apr 2, 2014 19:16:02 GMT -5
Too bad the article is grossly incorrect.
A Vacuum leak when sprayed with carburetor/intake cleaner will usually result in a drop in idle speed, not an increase as stated in the article.
In fact, if the leak is big enough....you might cause the engine to stall when spraying around.
here is a video.....go to 3:35 and watch.
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Post by charger440sixpac on Apr 3, 2014 8:31:09 GMT -5
Could the difference be due to how our older carbureted muscle cars behave vs. the newer models with ECU's?
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Deleted
Deleted Member
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Post by Deleted on Apr 3, 2014 14:06:47 GMT -5
Could the difference be due to how our older carbureted muscle cars behave vs. the newer models with ECU's? That is a distinct possibility. I was speaking from my own experience on late model vehicles. Can't say that I have ever done any leak testing on our dinosaurs.  I watched another video by Edelbrock that stated, but did not demonstrate, that the idle speed would increase. So, I reserve the right to be correct or incorrect in my previous statement. A better statement that would apply to either application is that you will notice a change in idle speed if/when you spray in an area where a vacuum leak is present. |
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DynoDave
CO-ADMINISTRATOR
Motown Mopar-Wizard
Posts: 11,169
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Post by DynoDave on Apr 3, 2014 19:03:46 GMT -5
Yes, it would have been a little more generically accurate to say the idle will change when you find the leak (depending on what substance you are using, and it's flammability).
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