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Sorry if this has been discussed previously, but I can't find it.
Anyways... Drove home to NW Oregon and back over the weekend, and maybe 450 miles into the trip (600 each way) my tach started to bounce... I admit I was going a bit fast, but in 5th at about 4200rpm and up the tach would flutter a bit higher than the motor and fall back to where it is supposed to be. It did the same thing the entire way back home. I didn't hear any misfiring, and I've used Chevron or Shell for the trip (5 tanks). I also dumped in some Chevron FI Cleaner for the return trip, with no change.
My first thought is the igniter I have been hearing about...or some sort of electrcal gremlin. BTW, what does the igniter do?
Any thoughts?
Anyways... Drove home to NW Oregon and back over the weekend, and maybe 450 miles into the trip (600 each way) my tach started to bounce... I admit I was going a bit fast, but in 5th at about 4200rpm and up the tach would flutter a bit higher than the motor and fall back to where it is supposed to be. It did the same thing the entire way back home. I didn't hear any misfiring, and I've used Chevron or Shell for the trip (5 tanks). I also dumped in some Chevron FI Cleaner for the return trip, with no change.
My first thought is the igniter I have been hearing about...or some sort of electrcal gremlin. BTW, what does the igniter do?
Any thoughts?