cold engine issue
#1
cold engine issue
hi. i recently got a 2004 rx8. it runs great but once it gets below 15 degrees celcius outside when i start it up and let it idle the rpm meter revs up and down fluctuating about 1000rpm's. it doesnt do it when my foot is on the clutch. eg. itll rev up to 2500rpm then imediatly down to 2000rpm then up to 2500rpm then down......until the engine is warm. Anyone have any ideas whats causing this?
#3
Rotating eccentrically
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hi. i recently got a 2004 rx8. it runs great but once it gets below 15 degrees celcius outside when i start it up and let it idle the rpm meter revs up and down fluctuating about 1000rpm's. it doesnt do it when my foot is on the clutch. eg. itll rev up to 2500rpm then imediatly down to 2000rpm then up to 2500rpm then down......until the engine is warm. Anyone have any ideas whats causing this?
It stops when you put the clutch in because the computer figures you're thinking of driving off so it gives you back control over the throttle.
#6
Dum Spiro Spero
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Some fluctuation in rpms is considered normal for rotary engines. However, you might want to check your plugs. Unstable idle can be caused due to fouled plugs. Do you know when was the last tune up?
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Rotating eccentrically
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First time it happened to me I ran inside and logged onto rx8club.com and got the very same answer I gave you. Don't listen to all these guys from the sunny South.
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Totally normal. Though if the temp drops below -10F (or so) you can expect 3k for about 10 seconds after startup, then it'll lower to 2.5k, maybe bounce between 2.5 and 1.5k, until it gets its fluids warm enough to idle happily at 1.5k.
The highest i've seen my RPMs go is 3.5k on startup, and that was at -25F. It only lasted for 30 seconds at the most, then dropped between 2.5k and 2k.
The highest i've seen my RPMs go is 3.5k on startup, and that was at -25F. It only lasted for 30 seconds at the most, then dropped between 2.5k and 2k.
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