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rough idling

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Old Sep 14, 2009 | 05:08 PM
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rough idling
what would cause my car to idle rough? when first crunk it surges all the way up to 6 or 7 thousnd rpms and then drops down way past one and then dies
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Old Sep 14, 2009 | 05:28 PM
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Post year/model info.
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Old Sep 14, 2009 | 05:34 PM
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86 fc nonturbo
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Old Sep 14, 2009 | 07:45 PM
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Originally Posted by squatches
what would cause my car to idle rough? when first crunk it surges all the way up to 6 or 7 thousnd rpms and then drops down way past one and then dies
my car does this too sometimes but all i do is give it a rev and it doesn't die..
i have a 88 rx7 vert by the way
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Old Sep 14, 2009 | 07:51 PM
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ive tried that if you rev it it automatically kills it i thought it might be bad gas but ive drained all old from tank and lines but still the same thing
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Old Sep 14, 2009 | 09:06 PM
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the 88 i am looking at does the same thing, only it dies immediately on trying to rely on idle, it runs fine just pops and sputters when it gets around 1k. i was told compression could cause it
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Old Sep 15, 2009 | 01:09 PM
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it doesnt do it every time its ran it only does it about one out of five times being drove or ran other than that one time it runs great
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Old Sep 17, 2009 | 07:07 PM
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maybe leak? or TB? not enough air? Have you find a problem?
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Old Sep 17, 2009 | 07:13 PM
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no not really i have no clue its still sitting in the building until i can figure out what it is
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Old Sep 17, 2009 | 07:36 PM
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Try leak test, check TB, voltage and wires. what ems you runing? running a TP?
Last edited by Chef-j; Sep 17, 2009 at 07:49 PM.
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Old Sep 19, 2009 | 06:28 PM
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havent ran a leak test but i will try it and stock ems and no
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Old Sep 19, 2009 | 08:55 PM
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Then i'm assume you are running cats? i would also check the core.
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Old Sep 19, 2009 | 11:58 PM
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ok ill check that to thanks
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Old Sep 20, 2009 | 07:07 PM
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check for vacuum leaks,
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Old Sep 20, 2009 | 07:57 PM
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tryed that far as i can tell none
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