mike0179

Hi all,

My 99, 4.0 ranger has a hard time starting when its cold out and it has sit over night. I usally have to crank it twice until it will start and when it dose start it hesitates a little and then idles fine. I have replaced the idle air control and the fuel filter. The engine runs good and strong. Could bad plugs and wires cause hard starting? Any Ideas:

thanks,

mike

mike0179

Any one?

This is a returning probem. I bought the truck in october snd it had the same problem plud it would idle rough and die. I cganged the iac and it solved the problem. the truck would start in the coldest conditions, but now it returned minus the idle problems. On tuseday it was about 40 degrees out and it fired instanly.

thefonz

Since you said it runs good and strong, I wouldn't suspect plugs or wires. Probably a sensor, but I'm not sure. Hopefully someone will be here soon with some advice. Good luck

mike0179

any Ideas? Im thunking it is a sensor problem because if it is warmer out it will fire right up. I wouldnt think if it were a fuel delivery problem because of that. However I just changed the fuel filter, if it was leaking could it cause the problem. Are there any experts here who can help.
thanks

mike0179

Well, I was told to go out in the morning before starting the pick up see if there was still pressure at the rail by pressing he pressure release. When I checked it there was no pressure untile I checked it with the key on.
What could be the most likely cause? Could it be the fuel filter leaking after the man cchanged it.

thefonz

If the fuel filter was leaking, it would be an external leak and you would see or smell it. They are probably talking about the fuel injectors leaking down.

mike0179

Well, im still having a hard time starting the truck after it has sat overnight. Once it starts it only hesitates for a second at the most and idles pefectly. The weird thing is I can go t work for nine hours go out and it will fire right up, and its just as cold. the other day it was warmer out (34 degrees) and it fired right up. Like I mentioned before ther are no driveability problems what so ever, and the gas mileage hasnt changed. Could a sensor cause this?
I heard it could be the upper intake gasket leaking when cold, but My truck idles perfect as soon as it starts. Thanks

mike0179

Any more ideas?

mre_power

something in the fuel system. might have a leak some where or bad valve in the fuel pump. or what ever keeps the fuel from flowing back into the tank when the engine is shut off.

consider this. when you change a fuel filter you have to turn it over twice. once to prime the system and the other to actually start it. sounds exactly like what you discribe.

spike6969

I would try turning the key to the on posistion, wait about 7 secs or so..Let the fuel pump to the motor and try..Let me know if that helps..