LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Car feels sluggish after xe218/224 install, NEED HELP!

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Old Jul 18, 2003 | 10:49 AM
  #16  
badblackz's Avatar
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I know that mine is installed properly because I checked and rechecked 15 times. I just lined the dots up.

Thunderracing said to run the colder plug due to the increase in compression.

Another question - My idle is screwed up. When coming to a stop and I push in the clutch, the idle drops to like 600rpm. Then after about 10 seconds it recovers itself and runs great right at about 1000 rpm. During the install I took the IAC Valve out to look at it. It was coated with heavy carbon deposits. I cleaned it with carb cleaner and reinstalled it. Could this be the culprit??
Old Jul 18, 2003 | 02:05 PM
  #17  
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Anyone? Is this just how it will run with the cam? Or is this a tuning issue? IAC?
Old Jul 18, 2003 | 02:27 PM
  #18  
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Has to be your IAC.Mine idles fine.
Old Jul 18, 2003 | 02:48 PM
  #19  
Chris 96 WS6's Avatar
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Originally posted by badblackz
I know that mine is installed properly because I checked and rechecked 15 times. I just lined the dots up.

Thunderracing said to run the colder plug due to the increase in compression.

Another question - My idle is screwed up. When coming to a stop and I push in the clutch, the idle drops to like 600rpm. Then after about 10 seconds it recovers itself and runs great right at about 1000 rpm. During the install I took the IAC Valve out to look at it. It was coated with heavy carbon deposits. I cleaned it with carb cleaner and reinstalled it. Could this be the culprit??
Probably a tuning issue. With a non stock cam that needs a bit more idle RPM you need to increase the steps on the IAC throttle follower table. This is what keeps the idle speed up when you are coasting to a stop.
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