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

How to combat low MAP and TPS? Fred? Rob?

Old May 18, 2003 | 06:47 PM
  #31  
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tested the MAP harness with the key forward. A and B are ground. C had 5v. anyway to test the MAP sensor itsself?
Old May 18, 2003 | 07:50 PM
  #32  
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How about putting a link to your Datamaster (.uni) file, too. Your initial MAP (baro) looks a little low to me and you don't seem to be pulling much vacuum. I am not an expert on this stuff, but trying to learn more.

Your TPS voltage is still screwed up, too. How can it see 5.1% throttle and no TPS voltage?
Old May 18, 2003 | 08:32 PM
  #33  
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Originally posted by shoebox
How about putting a link to your Datamaster (.uni) file, too. Your initial MAP (baro) looks a little low to me and you don't seem to be pulling much vacuum. I am not an expert on this stuff, but trying to learn more.

Your TPS voltage is still screwed up, too. How can it see 5.1% throttle and no TPS voltage?
www.acaenterprises.com/fredrun.uni

I was thinking the same thing on the TPS, its all ****ed up. There is 5v going to the TPS and MAP.

The pressure up here is much less than down there remember. Mile above you guys

Rob, can you get on AIM if you have a chance, I'd like to talk with ya about this.
Old May 18, 2003 | 08:59 PM
  #34  
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i dont understand... why dont you just replace the TPS sensor? its obviously not working correctly. maybe you could take it off the TB and spin it by hand to see if that will show any voltage changes.
Old May 18, 2003 | 09:36 PM
  #35  
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i am going to replace it. can i get it at like autozone? do they carry the GM one?
Old May 18, 2003 | 10:34 PM
  #36  
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Originally posted by thewinner
i am going to replace it. can i get it at like autozone? do they carry the GM one?
they probably have them... its whatever brand makes thier sensors.. wont be GM i can tell you that but it should work fine and if it doesnt then just take it back to use that lifetime guarantee they have.
Old May 18, 2003 | 10:39 PM
  #37  
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ya i'll probably pick one up tomorrow then, how hard are they to adjust and remove and install?
Old May 18, 2003 | 10:43 PM
  #38  
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no adjustment is necessary. just take the old one off and put the new one on.
Old May 18, 2003 | 10:49 PM
  #39  
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good deal, someone suggested that the egr code could also be causing these. I didnt believe it, but better safe than sorry.
Old May 19, 2003 | 07:43 PM
  #40  
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w00t amazing what a new tps can do. got rid of both codes!!!

uploading a new program to get rid of egr! idles nice now!
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