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Digital tach for engine analysis

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Old Aug 25, 2005 | 05:54 PM
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junior-ae
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Default Digital tach for engine analysis

Does anybody know of a decent tach that I can either plug into the tach service connector or use under the hood to help set the idle speed? I'd much prefer a digital tach to do that instead of trying to guess what the RPM is by looking at my dash tach that doesn't have ANY marks between 500-1000 RPM.

Do the inductive tachs work well? There's several of em on eBay, and supposedly they work much like a timing light.

Sears has an "Engine Analyzer" that has a bunch of different testing functions, but the product description on the website isn't very detailed at all, and I can't tell from the picture how it hooks into the car to measure RPM.

Thanks!
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Old Aug 25, 2005 | 06:01 PM
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The reason I'm looking is because either my idle is low, or my IACV is going bad. The car idles rough, and from the dash tach, I think it may be too low. But when I'm driving and roll to a stop (clutch in, no A/C, no load except the radio), the idle drops to ~750, the climbs back to ~1000, then drops back off and stabillizes somewhere just above 500-600. This is in a 96 EX.

My girlfriend drives a 00 EX, and I drive her car and mine the exact same way. Her idle drops and stabilizes immediately, and is smooth as a baby's ass. Mine bounces around, and is still rough when it does stabilize.

Ideas here? Thanks.
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Old Aug 25, 2005 | 08:37 PM
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All your vaccum lines good?
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Old Aug 25, 2005 | 08:43 PM
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From: topton,pa
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mine does the same thing i was told its just a honda querk
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Old Aug 26, 2005 | 01:21 AM
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i have a apexi vafc2 and a apexi rev speed meter. both reads rpms and does bunch of other kewl stuff. yes ima meter freak. but i have valid reasons for both.
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