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07-24-2014, 03:15 PM
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#1 |
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Registered User
Join Date: Jul 2007
Location: Fall River California
Posts: 2,026
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Tach pulses at idle
I noticed my engine stumbling at idle, I looked at my tach and the needle pulses or bounces while the engine idles. The tack jumps about 20 rpm for just a partial second then does it again about every 2 to 3 seconds. What could cause this? A bad plug? Plug wire? I checked all the wires and they seem fine. The engine is a 350 with electronic distributor. I've never notice this happening before. Thanks for any suggestions!
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