Hey guys,

I have a 2008 ford ranger sport and for the past 2 1/2 weeks my truck has been having issues in the morning or when cold. once the engine is warn the problem is gone anyone might know what it is,

thanks chirs

P.S: the gas mileage has been **** since the problem started

 

Hows the battery?

 

Battery is fine when i start in the morning it turns over but then insta-stall

 

So it starts and shuts right off?

 

mine fires up the majority of the time and sometimes it stumbles to start.

 

quarter start yea

 

One of your temp sensors is not reading right, it should be triggering a richer mixture at cold start, it is trying to run like it is warm outside and is much too lean.

 

kk ill change it and see

 

i will also put up a video once i finda the camera so u will have a visual

 

what about my quarter start

 

??????

 

mine fires up the majority of the time and sometimes it stumbles to start....oh snap you have a 3.Slow i got a 4.GO ill make a post in my section sorry

 

here the video of my problem. Maybe this will help your guys and help me figure it out

YouTube - 2008 Ford Ranger Cold Start

 

This problem can also be due to the fuel regulator on the fuel rail losing function, or the vacume line to it becoming damaged. it can create either too rich or too lean conditions, although i would think too rich would set off the CEK for the o2 sensors. but it will definately effect fuel economy.

 

Another point to check would be the wires going into your negative battery terminal, The fuel pump has its own ground connection there that if it faulters will cut out your fuel pump or reduce its pressure potential.

 

Same problem just different engine, could be negative terminal on battery or fuel pressure regulator,Vacuum hose to pressure regulator may be cracked and leaking. Im not sure which temp sensor sets up cold start mixture but that could be bad as well.