LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Could an exhaust leak cause...

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Old 03-18-2011, 01:28 PM
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it to run rich? These band clamps have always been a pain getting them to seal after the first use but recently I can hear a ticking coming from where the longtube collectors meet the true duals. I'm at school so I cant mess with it to fix it. But the car seems a tad bit sluggish and whenever I go full throttle to about 5k I can see a dust cloud behind me and it smells like gas
Old 03-18-2011, 06:07 PM
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Only if the leak was prior to the O2 sensors.
Old 03-18-2011, 08:22 PM
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Originally Posted by RamAir95TA
Only if the leak was prior to the O2 sensors.
well if the leak is post O2 but close enough to the O2 sensor to allow clean outside air to come in contact with it and give a false reading it could cause a similar condition.
Old 03-18-2011, 08:53 PM
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how rich will it run if it is leaking from the manifold? Mine is leaking bad from the passenger mani and it will barley run. I just replaced the opti so if that isnt it, could the leak cause this?
Old 03-18-2011, 09:06 PM
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well if it gets to 50% increase in fueling a ses light will come on. it could be anywhere in between. It really depends on how bad the leak is.
Old 03-19-2011, 09:59 AM
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Originally Posted by nitrous2fast
well if it gets to 50% increase in fueling a ses light will come on. it could be anywhere in between. It really depends on how bad the leak is.
it sounds pretty bad on either the 6 or 8 cylinder. but my car is running so rich at this point it will barely idle. I have a post about it and everything I ve been workin on.
Old 03-19-2011, 10:00 AM
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heres the link

https://ls1tech.com/forums/lt1-lt4-m...ire-96-ta.html
Old 03-19-2011, 02:06 PM
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Not to hijack this thread but im having the same problem with these band clamps, does anyone have any idea how to get a nice seal out of these
Old 03-19-2011, 02:15 PM
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Are you guys using 3in band clamps? If so might try using aluminum foil and wrap it around the exhaust pipe before putting on the clamp might help it some.
Old 03-19-2011, 03:59 PM
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yes im using 3 inch band clamps but i am running 3in duals
Old 03-19-2011, 05:09 PM
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Here this happened to me. I had a false lean condition on the left bank. If you think the leak is at the collector and not the band clap you tell by only two ways and one involves taking the header out. The other is easy. On a cold start start the car and run over and shove your hand up in the middle of the collector. if it is leaking you will feel pulsating air comming from the leak. If you feel nothing check around the out side of the collector for pulsating air. I't important to do it cold so A. you don't burn your self but B. the pipes are cold and they will expand as they get hot. Mine used to somewhat seal it's self up but still show up on the O2 as a false lean and cold sounded like a rod knock. Here's the thread, This is what I found. https://ls1tech.com/forums/lt1-lt4-m...er-w-pics.html



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