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Old 11-23-2007, 02:48   #1 (permalink)
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hard starting

HI every one!

I have a 99' Ranger, 4.0 that has a hard time starting when the outside temp is below 30 degrees and it sits for several hours. I have replaced the battery and cables, iac, iat, ect, fuel filter, cleaned the maf, changed the plugs and wires, and lower intake gaskets, had the coil tested. it will start and idle realy rough for 10 to 20 seconds and is fine after that. My mechanic tested the pressure for leak down and stuff and said it is fine, but he never had a hard time starting it. ( it was in a garage) Could the pressure regulator be causeing low pressure only when it is cold and it is haveing the problem? I cant hear the pump prime for 2 sec. should you beable to for sure with this model? I dont hear it when it is running either however. Some times when its really cold out it will start, sputter and some times die. on restart she fire right up. Once in a while it will start rough when it is warmer out ( low fifties) it seems like its always moist out durring that instance. thanks to all.



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Old 11-24-2007, 06:34   #2 (permalink)
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Re: hard starting

I had the exact same problem. But mine stopped after i did the intake gaskets and reset the computer. But if you dont hear the fuel pump prime when you turn the key to on, then it sounds like the fuel pump relay is bad.
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Old 11-25-2007, 18:33   #3 (permalink)
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Re: hard starting

thanks for the reply! Was it the upper o-rings or the lower intake gaskets you replaced. I had my lower gaskets replaced thinking that was my problem but it didnt help. my mechanic swears that the upper orings arent the problem.
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Old 11-26-2007, 05:57   #4 (permalink)
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Re: hard starting

I replaced them all a few years ago....Then the lower intake bolts worked themselves loose.....I guess they are known for that...So i just replaced the upper gaskets again, and retorqued the lower intake bolts to 20 ft. pounds.....But while I had the upper intake off i used a baby bottle brush and a can of carb cleaner to scrub all the ports nice and clean...(upper and lower) and when i put it all back together and hooked the battery back up it's been fine ever since...no more running like shit when it's cold for 10 or so seconds.
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