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rbo1577186 · Nov 20th, 2007, 06:59 PM

I don't know anything about the tach. I'm guessing it's tied into the ignition system somewhere, but anyway here's my problem/question.

Occasionally my tach jumps 1k for no apparent reason. It will stay 1k above what it is actually running for a few seconds, then slowly inch it's way back down to what the engine is actually turning. Today I was at idle tach read app. 1300, but idle was actually normal - 800ish. It's a 97 XE HB, 2.4 manual with 92k. I noticed it around 30k, just didn't care. Really don't care now but I'm curious to why it's happening. No CEL light. It might not do it for a few weeks, then it may act up several times in one week.

Nov 20th, 2007, 06:59 PM	#1 (permalink)
rbo1577186 Nissan Enthusiast Join Date: Jan 2005 Location: Winston Salem, NC Posts: 186	Tach Problem I don't know anything about the tach. I'm guessing it's tied into the ignition system somewhere, but anyway here's my problem/question. Occasionally my tach jumps 1k for no apparent reason. It will stay 1k above what it is actually running for a few seconds, then slowly inch it's way back down to what the engine is actually turning. Today I was at idle tach read app. 1300, but idle was actually normal - 800ish. It's a 97 XE HB, 2.4 manual with 92k. I noticed it around 30k, just didn't care. Really don't care now but I'm curious to why it's happening. No CEL light. It might not do it for a few weeks, then it may act up several times in one week.