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? will Lucas fuel cleaner richen up the fuel?

This is a discussion on ? will Lucas fuel cleaner richen up the fuel? within the Computer & Tuning forums, part of the LSx Technical Help Section category; car 99 WS6. after the FAST intake swap from LS1 intake tech2 tester reads SES light as lean on banks ...

  1. #1
    Member qwik219d9's Avatar
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    silver
    99 ws6

    ? will Lucas fuel cleaner richen up the fuel?

    car 99 WS6.

    after the FAST intake swap from LS1 intake tech2 tester reads SES light as lean on banks 1 &2 car was not retuned after FAST.

    without the Lucas fuel injector cleaner SES light comes on for a 20 or 30 miles then stays off for several hundred miles.

    if SES light is on I add the Lucas and a few miles later the SES light go'es off.

    ? will Lucas or any other fuel cleaner richen up the fuel and cause the SES light from not coming on?

    I did a search no results.

    Thanks
    Last edited by qwik219d9; 05-27-2009 at 06:10 PM.

  2. #2
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    silver
    94 silv

    If it does have any effect on the a/f ratio, then it will be very subtle. I've never noticed it.
    If the Lucas stuff is making the a/f ratio change (which I don't think it is), then the fuel trims must be on the edge of setting a SES light anyway.
    If you just put a FAST intake on your engine, and you're getting lean codes, you'll want to check for a vac leak.
    The best way is to use a smoke machine, where there's smoke, there's a leak.

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