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Old 07-31-2010, 08:42 PM   #1
WICKEDSS
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High RPM smoke

Ok guys I need some help.

Ok just got done getting my cats removed like 45 minutes ago.... Must say it sounds awesome!!! Only down side if when you get the rpms over 5K and let off the throttle uy poors smoke out , didn't do that before. You can smell fuel really bad. I was thinking we might have messed up a oxygen sensor or I have bad gas? Performance is way down like 0-50 in 9 seconds. I'm stoked on what it would be. And really need help. Only mods are a 228R cam, muffler delete, dyno tune and now no cats.
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Old 08-02-2010, 07:29 AM   #2
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So what did they put in place of the cats? Straight pipes? It's probably just the oil residue on the inside of the new pipes burning off. Give it a couple of miles...
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Old 08-02-2010, 07:40 AM   #3
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They just removed the guts the shells are still there just empty..... What gets me is it only does it when you take your foot off the throttle

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Old 08-02-2010, 10:33 AM   #4
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Quote:
Originally Posted by WICKEDSS View Post
They just removed the guts the shells are still there just empty..... What gets me is it only does it when you take your foot off the throttle
When letting off of the throttle, vacuum is at it's highest. You are probably sucking oil into the air intake system from the line that runs from your intake elbow to the top of the passenger side valve cover. A lot of people run an oil "catch can" to eliminate this problem.
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Old 08-02-2010, 11:39 AM   #5
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no cats = what you are experiencing.
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Old 08-02-2010, 01:30 PM   #6
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Ok and a drop in performance is normal at first? Guess the ECM needs to make adjustments
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Old 08-02-2010, 02:38 PM   #7
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Ok and a drop in performance is normal at first? Guess the ECM needs to make adjustments
you might need to retune.
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