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It appears that you may be suffering from the same problem i had a while back. Have you checked the wires to the alternator or even the plugs because the rev counter on a lot of cars runs of the alternator. Or it could be the alternator on the way out.

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โˆ™ 2015-07-17 17:41:27
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Q: Why do the rpms suddenly drop to 0 when driving on the highway?
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Related questions

What is the normal RPM range driving at highway speeds for a 1994 Jeep Grand Cherokee SE?

2-3 rpms

Is it bad to accelerate in a 1996 Camry with 228K on the clock at 3000-4000RPM will this shorten its life or not if so what are good RPMs to accelerate without hurting it?

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What would cause a rise and fall of RPM while idling in gear?

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Can you drive a truck with no overdrive on a highway the overdrive has to be looked at it is about an hour of driving on the highway?

Certainly. It's been done for years before overdrive became a thing... it just means you'll turn higher RPMs at speed, and you'll want to drive slower if you're conscious about fuel consumption. I had no problems when I took my 87 Silverado with a Muncie 465 direct drive transmission on the highway.

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Why does a 1983 Monte Carlo with 305 eng loose RPMs when the air conditioner comes on?

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