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

Lost timing on 7730

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Old Feb 25, 2003 | 05:17 PM
  #1  
Bob H's Avatar
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From: Sarasota,FL/No. Anson,ME
Lost timing on 7730

Hi guys,
I seem to have lost 3.5 deg timing in PE across the board. Acts like a default. The bin am running has 29.9 in 100KPA slot and no additional in PE table. Now runs 26.5 deg when in PE. Timing below appears unchanged.

I have noticed in past when compairing bins in Tunercat that it will sometimes change values in file that you are looking at. Wondered if I have changed some timing table vrs IAT or ECT or something else that Tunercat doesn't have table or constant for.

Have checked MAT tables, start up timing and etc. trying to find a change but no luck.

Have seen 30 deg back before started tuning.

Any ideas?

Thanks,
Old Feb 25, 2003 | 06:30 PM
  #2  
c5formetoo's Avatar
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Joined: Dec 2002
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From: manheim pa
check in the table called spark correction vs map vs temp. and see if there is retard called for at the temp you were running at when you scanned.
Old Feb 25, 2003 | 09:58 PM
  #3  
Bob H's Avatar
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Joined: Mar 2002
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From: Sarasota,FL/No. Anson,ME
Checked all the spark tables that TC has and can't find anything. Thought maybe there was something that TC doesn't have in their program that got changed when comparing bins. Ran into like problem before with 14.7 AF being changed to 14.6 and corrupted all bins that I compared. Had to buy new copy of my TPIS memcal to get back. Finally got TC to correct his 8D program to stop. Maybe a like routine with something else?

Thanks for the thought.
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