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Ranger intermittently kicks like a mule.


SpacemanSpiff

Member
Joined
Dec 15, 2011
Messages
8
Vehicle Year
1996
Transmission
Manual
Hey guys and gals.

The GF has a '96 Ranger 4cyl standard with ~¼ million miles on it that's still in really good shape.
Although it usually purrs like a kitten, a few months ago it developed a random "kick", mostly when starting off from a dead stop. It feels like the whole ignition/combustion process stops for a split second and then, *thunk*, picks up where it left off.
I should note that, at least once, it occurred while cruising along @ 55, and not in the middle of a shift.
I replaced the fuel filter first [it was original, cheap and easy], then the TPS [on the recommendation of her ex-] and finally, the plugs and wires on the right bank. I noticed one of the wires had been poorly routed against the end of a bolt sticking out of a bracket and had rubbed through the insulation. I was hopeful that was the cause...starting torque causing the wire to short to ground, interrupting the spark. [Seemed logical at the time]
Looked good for a few weeks, but now it's doing it again.
It appears to do it more frequently after idling at a long traffic light or stop sign, and possibly more often if it's damp...first thing in the morning. But...the same exact scenario may do nothing the next 2, 10, or 50 times.
Any clues, thoughts, suggestions, incantations?

TIA.

-Spiff
 
Ive been having a similar issue, except it only does it when i am at a stop light.

Ive heard that an old fuel pump may not produce the pressure it should, even 10-20 psi lower, but the motor will run fine intermitantly. I just need to check my fuel pressure to confirm this.
 
Fuel injectors?

A costly guess I must admit, but if you're planning on keeping it for the longrun...
 
Ive been having a similar issue, except it only does it when i am at a stop light.

Ive heard that an old fuel pump may not produce the pressure it should, even 10-20 psi lower, but the motor will run fine intermitantly. I just need to check my fuel pressure to confirm this.

Unfortunately, I have no way to test the fuel pressure.
I've been suspecting the fuel pump, but I'm not sure that it wouldn't act up at all speeds.

If someone could offer a logical explanation as to how a pump could behave this way after idling, I'd be more willing to replace it on a whim.

On the other hand...the pump is 16 years old and has 250,000 miles on it.
Kits can be had the bay of E for $30 incl shipping.

Maybe my weekend is cut out for me.

Let me know if you check your pressure and/or replace your pump. :)
 
DON'T start replacing stuff....wiggle each connector good while the engine is running/fuel pump elec connectors/ground wires as well to see if you can get the engine to act up---yes, it's a pain, but it could be that simple .....
 
Unfortunately, I have no way to test the fuel pressure.
I've been suspecting the fuel pump, but I'm not sure that it wouldn't act up at all speeds.

If someone could offer a logical explanation as to how a pump could behave this way after idling, I'd be more willing to replace it on a whim.

On the other hand...the pump is 16 years old and has 250,000 miles on it.
Kits can be had the bay of E for $30 incl shipping.

Maybe my weekend is cut out for me.

Let me know if you check your pressure and/or replace your pump. :)

Do it the easy way. Remove the bed.
 
In the continuing saga, the truck now tries to stall when idling with the a/c running.
You can hear the compressor kick on and off repeatedly.

I'm far removed from the days of idle screws.
Shouldn't the computer raise the idle to prevent stalls while stopped with the a/c on?
Am I looking at a bad sensor or computer or???
 
In the continuing saga, the truck now tries to stall when idling with the a/c running.
You can hear the compressor kick on and off repeatedly.

I'm far removed from the days of idle screws.
Shouldn't the computer raise the idle to prevent stalls while stopped with the a/c on?
Am I looking at a bad sensor or computer or???

Have you cleaned the idle air control valve? Maf? Checked the air filter? Start with the little stuff that is cheap or free then go from there? Is there any codes?
 

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