Q: 1999 Ford Ranger 2.5L. #3 and #4 cylinders are not firing, #2 sometimes doesn't fire.

asked by on

Engine is getting air and has good compression. Fuel pump is working and I installed a new fuel filter. The injectors all read the same resistance so I assume they are all functioning. My next guess is to check if the cylinders are receiving power. Also, it could be that the fuel pump is not providing enough pressure to the fuel rail. It is either that or something with the injectors not getting signaled by the computer.

My car has 106000 miles.
My car has a manual transmission.

You should first check the fuel pressure is within specification. Then check plugs are getting fire and then do a compression test on all 4 cylinders. If all this is normal then remove injectors to look for clogged injector inlet screens for trash in the system that builds up and clogs the injectors. Clean or replace injectors as needed and flush out fuel rail.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. 1999 Ford Ranger 2.5L. #3 and #4 cylinders are not firing, #2 sometimes doesn't fire.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: hello, i have a 2011 camry and the problem is when the alternator is putting out more juice it makes the belt tensioner bounce

If you are using an aftermarket tensioner, that is not a Toyota OEM part, that might cause some difference in the manner of operation. Also, be sure that the belt is the correct part number and measure the belt tension...

Q: Fuel gauge not working correctly

Hello, it sounds like the sending unit in the tank is bad. The only way to repair it is to replace the fuel pump assembly in the fuel tank. I would recommend having a technician come out and replace the...

Q: will not drive in right gear only in neutral will it move.

Hello there, many common faults will cause your 1999 Honda Accord to only move forward in neutral. The most likely fault is the shift linkage is faulty or worn shift linkage bushings. A qualified technician such as one from YourMechanic...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...