Hello I am new here and have a 98 3.0 ranger...it has been siting for a few months and is now being used again...Put fresh fuel in it and new fuel filter and when going up a hill its a dog ( compared to how it use to be before it sat ) wont go over 3k in 3rd gear also does not want to run untill warmed up and has a miss at idle...It is showing P0171 P0174 and P0401 I cleaned the MAF sensor but nothing now when I unplug it the idle is normal when pluged in it has a rough idle can the maf sensor cause the O2 sensors to throw a code? Im new to fords thanks guys!
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i am having the same issue on my 4.0 should be the same fix. i changed my fuel filter, o2 sensors, maf, and i have found it is the fuel pump. now it can be either one of those things i had to narrow it down. i just dont have the cash for a fuel pump yet lol
How did you find out it was the fuel pump? This is not the original fuel pump but anything is possible sent from my sgh-1717 running CM10
yup i changed everything else. what you should do first is check the fuel pressure coming from it and check it before the injectors. it also might be those but i wouldnt be sure on that. but do check the pressure.
will check that but is there also a way to test maf sensor? like I said when u unplug it the idle clear's up
buy a new one plug it in if it fixes it thats what was wrong if not return the part for your money back lol
Wow I just bought it 160$ for a sensor? If it fixes it I will try to return it and get one from a junk yard sent from my sgh-1717 running CM10
The junk yard is about 20 miles from me that's why lol but I'll post back if this fixes it sent from my sgh-1717 running CM10
Had battery disconnected and installed new maf sensor and no difference truck is getting worse to drive...the codes did not come back yet but could a bad 02 sensor really make the truck run this bad? Its getting to the point where you can't drive it sent from my sgh-1717 running CM10
it possibly could. i dont know much about the 3.0 but if there is to much or not enough fuel getting to the engine it will run like crap
Cleaned egr can't find vacuum leaks and did the pro pain test on one 02 sensor it was good...couldn't get other one out tho sent from my sgh-1717 running CM10
No I want to Replaced dppf sensor still have codes can't seem to see any vacuum leaks can a weak fuel pump cause this? sent from my sgh-1717 running CM10 sent from my sgh-1717 running CM10
