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

Could this have been my problem with the DTC33.

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Old Feb 22, 2008 | 11:24 AM
  #1  
BlazinREDZ28's Avatar
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Could this have been my problem with the DTC33.

Think I Have Found The Problem!!!!!!!!!!

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Okay everyone, I went outside this morning and changed out my MAF that had been ported, polished and descreened with an un touched GM MAF I borowed from my neighbor. My Iac counts droped to 43 and my MAP droped to 23 ihg and the car ran smoother at idle. I hooked up my friends MATCO determenator scan tool to the car and allowed it to run until it went into closed loop. The long term fuel count on bank2 to was 160!!!! So i scrolled down and took a look at the o2 on bank to and it was reading .430, .360, .240. It never switched from 900mv to 100mv. So I am thinking that the MAF and The right o2 sensor or trash and I have been fighting a problem that has been right here in my face the whole freakn time. Please someone tell me I am right. Thank you Injuneer and Shoebox for all your help.
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Old Feb 27, 2008 | 10:28 AM
  #2  
BlazinREDZ28's Avatar
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any thoughts on this being my problem? And for those who asked the cam is a comp cams 306
Old Feb 27, 2008 | 11:56 AM
  #3  
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Did you try swapping the o2's from bank to bank to see if the problem follows? Did you go back to a stock GM MAF yet?
Old Feb 27, 2008 | 12:15 PM
  #4  
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MAP = 23"Hg sounds incorrect. That would be a 7"Hg vacuum. You should still have DTC 33.

Right O2 sensor or the wiring appears it may be a problem. Excessive air in the exhaust would cause the same result though.
Old Feb 27, 2008 | 09:39 PM
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Friday I am off work and I will change the right o2 sensor for I have already repaired the damaged wires. I will rehook the scan tool and see what it says. By the way I am installing a Delphi O2 sensor is that a good one to use. Injuneer have you had a chance to look at that data log? Thanks to everyone for all the help. God knows I appreciate it because now I have two forth gens.LOL
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