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Have some issues trying to solve a fuel trim problem running LPG.

Using ESP Automotive software in analysing the OBD codes, this software has real time freeze frame facility, I get long and short fuel trim banks that are numbered No.1 to 4. I know what Fuel Banks trim 1 and 2 are, but not what 3 and 4 represent.

For a six cylinder engine I expect to see Bank 1 and 2 only, but I see there are 4 fuel banks shown, or is my software not set up correctly??

Can anyone help me with this information or perhaps tell me where to look on the Internet. I have been searching every where for this information.

Appreciate your help.

Thanks.

Stuart Burgess. :)
 
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