Hey folks, first time poster and looking for some insight. I have a 1997 ranger with a 2.3 manual. Now, I know it's a tiny engine and it was underpowered to begin with but it's just feeling a little doggy. The truck probably has 160,000 mi on it, I don't know because I swapped the gauge cluster because the previous one wasn't working. Do you think it'd be worth doing a tune-up?

 

Welcome to the forum

Spark plugs and wires are a good thing to change every 5 to 8 years
Call local Ford Dealer to see if they have any sales on or coming up, you can usually get Motorcraft spark plugs and wires from dealer cheaper than discount brands from local auto parts stores or even on-line, IF they are on sale.

Check if your throttle cable has stretched, common issue on older cars.
Key off
put something on the gas pedal to hold it down to the floor, stick against the seat works OK
Open hood and check if you can manually open the throttle more, if so.........
Google: Ranger throttle cable mod
Simple fix

new fuel filter every 5 years
Check and clean air filter, you already have a Cold Air Intake

Get a vacuum gauge, $25, works on ANY gasoline engine
Test vacuum
This will tell you if compression is still OK
You can also test for exhaust blockage, this robs power

Rangers all have tuned exhausts, the exhaust manifold creates a lower pressure at the valves to suck exhaust out within a certain RPM range, this leaves more power in the crank for rear wheels, and restriction in the exhaust pipes takes that away, i.e. broken Cats or Mufflers
Tap on Cats and Mufflers with wooden stick or rubber mallet, if you hear rattling then parts are broken inside, and that can restrict exhaust flow

Good read here on using vacuum gauge: http://www.gregsengine.com/using-a-vacuum-gauge.html


2.3l lima engine uses a timing belt, these do stretch over time, replacement is speced at 70-80k miles, if valve timing is off then compression gets lower and with it power gets lower
2.3l should run 9.3:1 compression, so 170psi would be expected

Look at the drivers door sticker to see what rear axle ratio you have, read here: http://www.therangerstation.com/tech...le_codes.shtml

3.73 was pretty standard
3.45 or lower was often used on 4 cylinders because it gets better MPG on the highway, but lacks power around town or for towing, people buying 4 cyl pickups are usually after MPG not power

4.10 or higher gives better low end power for around town or towing, but less MPG at highway speeds