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: My car starts and shifts but doesn't move in any gear and there is no check engine light, what would be the problem?

You need to check the transmission fluid level to see if it is low. This would cause the no transmission engagement. If fluid is full then you have a transmission shift control valve issue which will need to be tested...

Q: Just replaced the fuel pump with a prime choice off of Amazon and put in brand new fuel lines. I can smell the gas but I don't hear the fuel.

Hi there. From the description you have provided, you may be dealing with a combination of problems concerning the fuel pump replacement in your vehicle. First being, it could be the replacement fuel pump, is incorrect by application. Second being,...

Q: Why would I have an intermittent spongy brake pedal on my 1999 Chevrolet Suburban

Hello. Most of the time this is caused by the master cylinder failing internally. If you have replaced it with a new one then that should not be the issue. If you used a rebuilt master cylinder then that may...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.