I have been attempting to diagnose the problem to my 1994 ford ranger xlt 2.3l 4cly. It would started to stall after accelerating in 2nd gear then would start struggling as if it wasn’t getting any gas at all I would have to rapidly press the throttle down or hold it down to prevent it from stalling.
I’ve replaced the spark plugs, Mass Air Flow Sensor, Air filter, Fuel Filter, and the Fuel pump.
any help would be amazing!

 

If it was a fuel issue, it would be better to use a fuel pressure guage to measure pressure first. 35-45 PSI with engine off but key on. 28-35 PSI with engine running. Lets hope that new Mass Air Meter and Fuel Pump are good. New parts doesnt mean 100% gauranteed to work out of the box.
You have OBD1 engine system, scan for codes with test light or dash light. https://www.therangerstation.com/tec...ry/OBD_I.shtml. Youll have ot use "MIL method" which youll be watching dash engine light flash.
Perform KOEO and KOER tests. Report back any 2 or 3 digit codes. You should atleast get a 111 code which is a successful read.
If no codes after those 2 tests, carefully inspect the inside of the PCM. Look for blown capaciters.
Pull those fresh plugs and read them. Do they look black already which suggests a rich condition?
Since its gotten cold with the weather, check Inlet Air Temp sensor and Engine Coolant Temp sensor. Wasnt sure if you said if it ran ok once warmed up?

This is where i would start :)

 

thank you for your help, I ended up figuring it out the pump I got was bad but now whenever I’m driving it around randomly every now and then it’ll just start to low idle and almost stall and I have to rapidly press the accelerator or hold it down to prevent it. It’s not anywhere near as frequent or as bad as before but it seems to mainly only happen when going up hill then coming to a stop. Or sometimes whenever I come to a stop. Any other ideas?

video below is it running clearly sounds rough but after warmed up sounds a lot better

 

Almost sounds like an over rich condition. Pull a few plugs and see what they look like. This will confirm.

Can you get a fuel gauge and measure pressure?

Vacuum line to fuel regulator good?

How old are those O2 sensors?

 

A vacuum leak will make the engine die at idle when warm.

 

Ive replaced the spark plugs and wires, I don’t know about the fuel pressure I’d have to find a way to measure that, as for the regulator I haven’t checked into that at all I’ll look into that and see and the O2 sensors I also haven’t bothered with.

 

Yea i dont mean to replace the spark plugs, but simply take them out and look at them and see if they are discolored. Note which plugs look diferent. Its called "reading plugs". You will see if the engine has been running rich or too lean. If only 1 spark plug is different from the others, that that tells you may have an injector problem on the cyl.

Measuring fuel pressure with guage will tell you if the fuel system is operating correctly at the right pressure (fuel pump. regulator, filter...)

Good luck!