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Strange Idle, Any Ideas?

Strange Idle, Any Ideas?

Old 08-25-2009, 07:18 PM
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Default Strange Idle, Any Ideas?

Hi everyone,

I tried out a different glow plug last night, it was an OS medium hot.

As soon as I started i noticed a difference with the idle, it was ALLOT higher that with the standard glow plug that came with my buggy (1:8 nitro .21 SH).

Is this common? Naturally I adjusted the idle back to where it was previously but just curious if this is a common change when trying out a different glow plug.
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Old 08-25-2009, 08:38 PM
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I think yes when you change from cool to hot plug. Correct me if I am wrong.
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Old 08-25-2009, 11:57 PM
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Anyone else???
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Old 08-26-2009, 08:48 AM
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What has happened isnt uncommon when you are changing from one heat range to another. When your engine was built it was designed to run on one type of heat range. Now when you go to a hotter plug you are advancing the timing of the engine, as well goes when you use a colder plug is retards the timing. Either way you are going to have to retune your engine accordingly in order for the system to work such as amount of intake and fuel needed to run at the set timing you have made.
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Old 08-26-2009, 05:34 PM
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Ok thanks, so I should start by richening it up, if the hotter plug is advancing the timing its going to make it leaner. Sound correct?

Ill take it back 1/4 turn and go from there.

Thanks for that.
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Old 08-26-2009, 09:13 PM
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Originally Posted by sperera View Post
Ok thanks, so I should start by richening it up, if the hotter plug is advancing the timing its going to make it leaner. Sound correct?

Ill take it back 1/4 turn and go from there.

Thanks for that.
whenever i change a plug range/brand or different nitro brand (same %), i'll richen my HSN and LSN by 15mins and retune from there.
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Old 08-26-2009, 11:26 PM
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Originally Posted by keavze View Post
whenever i change a plug range/brand or different nitro brand (same %), i'll richen my HSN and LSN by 15mins and retune from there.
I think thats what I will do, cheers mate.
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