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post #1 of 5 (permalink) Old 07-23-04, 08:50 PM Thread Starter
rev
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Increased plug gap improves idle

After a year a screwing about trying to fix a rough idle when cold (plugs, leads etc etc), I decided based on an a real old thread about another issue, to increase the plug gap from the recommended 1.1mm to 1.3mm. The car now idles perfectly. Maybe the extractors, PULP and a few degrees extra advanced timing made it want more gap to burn better. *shrug*


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post #2 of 5 (permalink) Old 07-23-04, 09:07 PM
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Re: Increased plug gap improves idle

yep i mentioned iti a recent post as well after talkig to a friend with a similar problem.One question though???How does the car go?
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post #3 of 5 (permalink) Old 07-23-04, 09:15 PM Thread Starter
rev
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Re: Increased plug gap improves idle

Seems to run just fine though I haven't gotten up it. The transmission changes (up and down) almost seem smoother but that may be my imagination.

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post #4 of 5 (permalink) Old 07-23-04, 10:22 PM
Jim Mock You Rock
 
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Re: Increased plug gap improves idle

So realistically openning the gap will cause a bigger spark and then the computer will compensate with a better performance..i hope..i..m gonna try it.thanks.!!
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post #5 of 5 (permalink) Old 07-24-04, 03:53 AM
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Re: Increased plug gap improves idle

Yeah a bigger gap will give you slightly better performance and spark AS LONG as the coil can dispense enough energy to bridge the gap. If not then you get no spark unfortunately. The recommended 1.1mm is probably the "safe" maximum gap.
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