Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

car has black soot on bumper, how to stop this? w/ tunercat

Old Aug 23, 2003 | 08:24 PM
  #1  
Fbody1's Avatar
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From: fl,jax
car has black soot on bumper, how to stop this? w/ tunercat

well I can guess that it is running a little rich, but how ,or what tables in tunercat do I adj to correct this ,I hear of people changing one table and nothing happens, if it is a few tables wich one's are they, and do you add or subtract from the tables, any suggestions please?
Old Aug 24, 2003 | 11:41 PM
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What does your datatlogger say your BLM's are running at?

I would assume you are rich, but rich across the board or just rich in certain areas.

Since you changed your injectors, you need to look at your constant you have it set at but only after looking at your datalogger data.

Ben
Old Aug 27, 2003 | 07:00 PM
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From: fl,jax
well last week I looked at them they were @ 108 ,l and r, and I changed the inj constants to what they say to for the svo 24 lbs inj( I think it was like 25.69) I done this about 4 month ago, and I have a GMS maf so I set the maf tables to add 45% , for the maf (they said if flows 45% more )
Old Aug 27, 2003 | 08:58 PM
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Your problem was adding 45% to the MAFS tables. There's no way it flows that much more.

Try going back to stock and adding 10% (multiply by 1.1) and see if that helps. Your BLMs should definitely go back up.
Old Aug 28, 2003 | 08:41 PM
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The Granatelli is preprogrammed from the factory. You need to set your pcm back to stock....you'll get some power back too.

Joe
Old Oct 15, 2003 | 08:59 AM
  #6  
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Did you ever resolve this problem?

I have the same black soot too which stains the bumper but my Block Learns are like 120 when cruising not 108.

Thx,
Claude
Old Oct 19, 2003 | 06:44 PM
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From: fl,jax
well ,I just put the maf tables back to stock, did not do a data log since this, but the ,pop, or the miss that would happen at the rpm that the change took place is gone, still got plenty of black stuff on the bumper, would the valve guide seals ,leaking oil into the combust chambers have somthing to do with the (soot )on the bumper?
Old Oct 20, 2003 | 01:44 AM
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From: Long Island, NY
yeah the valve seals would do that, at least thats the problem on my car
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