My ranger is not running right need help!

[Mudslut91]

I have a 1986 ford ranger 4x4 2.9 5speed an when I start it an take off it cuts in an out an pops an if it is sitting there idles it will jus randomly start acting like it's runnin out of gas an die...I have replaced
Both fuel pumps..fuel pressure regulator..distributor..plugs..wires..every sensor on the motor I have replaced an I have replaced the computer

 

[SenorNoob]

What about the fuel filter?

 

[RonD]

Not for nothing...............but

If you are replacing all those parts then money must not be a problem................
So why not just buy a new truck instead of replacing it one part at a time?


If you want to keep this truck, my first suggestion would be to invest in some diagnostic tools, buy or rent, a compression gauge, and fuel pressure gauge.
Buy a Volt/OHM meter($15) and a Vacuum gauge($25).
These are way cheaper than parts you don't need, and you can use them on any vehicle.

I doubt you could run into any engine problem that couldn't be diagnosed if you had access to these 4 tools.
Remove all spark plugs, do a compression test and write down results.

Install pressure gauge and cycle key on and off a few times, write down fuel pressure.
Wait 20 minutes and write down fuel pressure.
Start engine, write down idle fuel pressure
Rev engine to 2,500rpms and hold it there for 1 minute, write down pressure at that time

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

Volt/ohm meter can be used to test sensors and wires

Your problem reads like you have bad gas, water in the fuel tank.
If you have changed the in tank fuel pump then you drained all the fuel out right?

Next guess, and it is only a guess, would be blocked/clogged exhaust system.
Exhaust systems rust from the inside out, Cats and mufflers can collapse inside, you usually first notice this as a lack of power at higher speeds, but it can appear suddenly.
If exhaust can't get out then fuel can't get in, so "acts like it is running out of gas" is a symptom.

 

[Mudslut91]

Yes I replaced fuel filter to and I replaced gas and it doesn't have any cats on it and it has a flowmaster muffler on it

 

[RonD]

Yes I replaced fuel filter to and I replaced gas and it doesn't have any cats on it and it has a flowmaster muffler on it

And the tools you are using?

 

[BrianbroncoIIman]

The fuel rail can rust internaly and choke off fuel flow to the injectors but like rond says you need test equitment to tell whats going on, dont just replace parts and waste money.


Sent from my iPhone using Tapatalk

 

[--weezl--]

this is an interesting one...

what does the exhaust pipe smell like when it dies? eggs? raw fuel? soot?

when you pulled your plugs, what did they look like?