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

Help w Bank 1 Sterm high only??

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Old Dec 6, 2005 | 06:03 PM
  #1  
Deenasty's Avatar
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Help w Bank 1 Sterm high only??

Just as stated, Bank 1 STerm Count goes to 150, while the LTerm stays at 130 at idle.

Bank 2 everything is fine Sterm Count 128, and LTerm Count 128.

This is only occuring at idle, with an idle PE tune. My lm-1 is on bank 1, after the o2, and it is reading 13.8 at idle. What can cause the STerm to be reading so high? There are no exhaust leaks present. Can it be a misadjusted intake valve?
Old Dec 6, 2005 | 06:08 PM
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Re: Help w Bank 1 Sterm high only??

Are you running an aftermarket TB? Some aftermarket TB's don't have the "air feed hole" that the stock TB has to supply air directly to the intake ports for idling. This has been known to cause a mismatch in blocks. Try doing a search on this topic.
Old Dec 6, 2005 | 06:26 PM
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Re: Help w Bank 1 Sterm high only??

Originally Posted by OBE1 95Z28
Are you running an aftermarket TB? Some aftermarket TB's don't have the "air feed hole" that the stock TB has to supply air directly to the intake ports for idling. This has been known to cause a mismatch in blocks. Try doing a search on this topic.
I do have an aftermarket TB (BBK 58), but this is only occuring on on side(BANK 1) so its not a case of split BLM's.
Old Dec 6, 2005 | 08:50 PM
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Re: Help w Bank 1 Sterm high only??

anyone please..
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