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The factory tach is reading much too high. Is there a simple DIY adjustment to make on the tach from under the dash, or do I have to take it out and send it to someone. If the latter, who is recommended?
Thanks in advance.
I put on my spare alternator & the needle jumping has gone away, so I just dropped off the original alternator to my local repair shop.
I thank everyone for their input & advice.
Thanks for all the replies. To answer questions.....
I haven't checked the battery voltage.
No, at idle it's fine & as soon as you increase speed it goes +20 and the needle bounces.
This is the original alternator on my 68 survivor Charger R/T.
Tried several voltage regulators...
What causes an ammeter to read like this with the needle bouncing around about 1/8"? New NOS Chrysler voltage regulator, 1 year old battery, alternator & ammeter connections are tight. Good ground on the regulator & the bulkhead connectors are fine.
Thoughts?
Well, he pulled out the bulkhead connectors and saw a nice burn on the fuse link wire on the bulkhead side. As you can see, besides being melted, the connector inside the plastic is pretty roached out. A replacement bulkhead connector is on order.
Done that, no fuel leaking. He had an issue with the fuse link wire melting a bit on the bulkhead side a few years ago & I wonder if this might be worth looking at.