If my truck is running a little rich will changing to the next hotter plug help lean it out?

Update:

1988 F250 injected 5.0

Stock autolite #25 plugs

4 Answers

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  • 6 months ago

    No it won't. You need a scan tool to read all of the engine data to see if you have any sensors out of spec. A bad ECT sensor, MAF sensor, or 02 sensor can cause a rich code.

    Source(s): Mitsubishi Master Tech
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  • L.N.
    Lv 7
    6 months ago

    No, it could help burn carbon deposits off the plug tips but your mixture won't change and the rich condition will still exist. It could also lead to pre ignition and engine damage.

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  • Anonymous
    6 months ago

    NO. To make it run leaner you either need more air or less fuel. A different spark plug won't change the fuel-air ratio.

    Source(s): A basic clue about combustion principles. Get one
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    • Jay P
      Lv 7
      6 months agoReport

      The answer did not state that you don't need a spark plug ( which you don't on diesel engines by the way as diesels rely on compression ignition ). What it did state is a DIFFERENT spark plug won't change the incoming fuel:air ratio.

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  • Anonymous
    6 months ago

    No. That will have no effect whatsoever. You need to solve the problem rather than guess at solutions. If it's carburetted you could fit a clean air filter, or fit slightly smaller jets. If it's fuel injected clean/replace the mass air flow sensor. Tutorials are on the 'net.

    • Ryde,0n
      Lv 7
      6 months agoReport

      No Mass Air Flow , It runs on a MAP .

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