No no no, 3000-4000 rpms is the average speed for highway traveling, driving too close to the red mark on your rpm is bad
the rpms should rise and then drop no more then 500 rpms when the fan on the radiator turns on and then off.
If your 1992 Voyager does not seem to drop into the proper RPMs so that you are running at 5000 RPMs at 65 miles per hour, the timing belt might need adjusted. It can also indicate the idle is set too high.
If you accelerate and the transmission shifts to a lower gear of the overdrive disengages the RPMs will increase. If the vehicle has a manual transmission a slipping clutch will cause the RPMs to increase if the clutch is defective.
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.
in relationship to engine rpms a ratio of something like 3.08 would have less acceleration and lower highway rpms compared to 4.11s. the 4.11 ratio would give you better acceleration and less top speed and lower gas mileage at highway speed
If you don't know how to downshift (and upshift) and unsynchronised manual progressive shift transmission, you really need to go to a truck driving school. You're not going to learn how simply by read about it. In school, they'll teach you to drop the RPMs down to 1000, pop it into neutral, kick the accelerator to 1500 RPMs, then drop it into the next gear. It might look simple enough on paper, but you're not going to get this down without some hands-on experience.
If the rpms are to high for to long the engin will over heat and you will drop it
Try replacing the map sensor
If you mean why the difference in RPMs between idling and driving, the difference is due to the engine load; At idle, the engine isn't really doing much other than staying running, but under load (driving) the engine has to put its power out to the drivetrain, hence the symptomatic loss of engine speed (RPMs).
First make sure all your tires have the same amount of pressure about 35psi/40psi(22's). Also city driving is the worst try to get more highway & keep your RPMs under 3(3000)!
The A/C puts an extra load on the engine, so it's natural that the engine RPMs drop slightly when the A/C is activated.
If it is the SRT model it is probably the turbo, if not it may be the transmission
Check the timing and check that the cable to the accelerator is adjusted correctly.
No, that is not normal. Should be around 2500 rpms.
Erratic RPMs while driving or in park could be due to a faulty oxygen sensor. It is also possible that poor gas is being used.
about 12, 13,000 RPMS.
lower rpms use less gas higher rpms have more power
If by surge you mean the batterys volts drop and the engines rpms drop all the vehicles accessories that are on at the time are wanting to draw more amps then the vehicles alternator has to give. or by surge you mean the rpms increase a little bit and if the heat or A/C is on at the same time the A/C pump or clutch might possibly be going out.
3-4 thousand rpms
If the engine doesn't recover, the timing belt (if applicable) could have let go otherwise it could be a fuel delivery issue (dirty fuel filter, faulty fuel pump) or a restricted exhaust (damaged catalytic converter). If you have a check engine light illuminated, start with checking the codes.
Alternator belt is slipping. Tighten or replace as necessary.