hey guys, I'm new here and have a question. I bought my son a 2006 Ranger 4x4 with a 4.0 engine. It's been a great truck and only has 70k miles on her. Well,about a month ago it started acting kinda sluggish when you tried to take off and the check engine light comes on.

I took it to to get the code identified and the tech said that it was running lean on banks 1 and 2. I took it to the ford dealership and they said that it was an intake leak but they couldn't find it.

Newt I took it to a local mechanic that has a good reputation and the tuned it up but the light came back and it started doing the same thing again.....sluggish.

Finally, I took it to another shop that has an excellent reputation but they are kinda pricey. All of the mechanics there are certified and the have had the truck for 4 days and cannot find the leak.

Has anyone here been through this or have any idea as to what the problem could be. Any responses would be greatly appreciated!!!!!

BIGTIME

 

click the link below

If you have an 01+ 4.0 with lean codes (PO171 and/or PO174) look here! - Ford Ranger Forum


i had this issue with my ranger

 

if thats your issue, buy one of theses hoses when you replace it if its cracked. it'll last way longer


https://www.ranger-forums.com/4-0l-o...mon-cel-93776/

 

Thanks for the diagnosis JD!!!!! I also want to thank 99offroadrngr for the link to the new hose!!! You guys are the best. I'm going to enjoy hanging around here and learning new things about my boy's truck.

 

I had my mechanic replace the elbow this morning with no luck. He said that he was going to clean the oxygen censors and see if that helps. PLEASE, where do I go from here??????????

 

It is most likely an Oxygen senso. I see it all the time at work. If its not an O2 sensor, try looking at the wiring going to it. I have had a few customers buy an O2 sensor because their mechanic said they need it and then return it once the mechanic pulled the old one out and just realized it had come unplugged or it had a broken wire.

 

That stinks. Is there another Ford dealership in your area? There should be no issue for a senior master tech to find an intake leak (if thats what it really is) by knowledge and using the IDS.

If you can get the code, post it up.

 

Taking it to another Ford dealership this week. This is just getting plain ridiculous!!!!

 

I have had pretty good luck with vacuum leaks using the smoke machine. Fill the intake with smoke see if it stays in. You could ask about it when you get there, its what they probably use for evap leaks. Good luck with your truck.
ps also might want to check the baro reading with ids can mess with mixture. Depends on your elavation here in Pa where I am its around 154 to 157ish. If its down in the 140s here it can make her lean.

 

The guy that has it now has a smoke machine. I called a dealership about 20 miles from here and I'm taking it to them. This really stinks!!!!

 

I haven't taken it to the 2nd dealership yet because shop #3 said that he was positive that it was 2 Oxygen sensors. I had him install them but it didn't help at all. He told me to take it and drive it on the interstate at 75-80 MPH for 30 miles and back and that should fix the problem?????????That sounds insane to me. But I will try it in the am and then it's going to the Ford Dealership.

Now I have a moral delema. Do I pay for the sensors that were not the problem. What would you guys do???????

 

Did you already pay for them or not? If you didnt I would ask for your old ones back if he does not have them I would not pay him because he threw yours away and they were ok and now you need them. I see p0171 and p0174 codes all the time in the shop and when you look vehical has 2 new sensors from a another shop. And still setting codes. Up to you go with your gut.

 

I definitely wouldn't pay for that if it didn't fix the problem. You'd be paying to pick up your truck the same way it went to them.

If the 2nd dealership can't figure it out, ask them if its possible to contact their Field Service Engineer.

 

The 2nd dealership found and fixed the problem!!!!! It turns out that there was a huge crack in the side of the air box. It was full of water, mud and tiny rocks. They changed out the Mass Air Flow Sensor and the Air Box Assembly. It set me back $780.00 but it's fixed. From now on it will go to the dealership if I can't figure it out.

 

sounds like your son may have been having a bit too much fun with the truck? lol luckily it didnt suck up any water into the engine!

Great to hear its fixed, aside the price tag of course. Kinda sad the first dealership didn't even check the airbox though

 

Glad you figured it out, you might want to tell your son to take it a little easier off road next time.

 

Oh Yea, the wife and I have sat down with him and he offered to pay for the damage out of his savings account but there were so many mistake made and incorrect diagnoses that we have decided to let him keep his money this time but I won't pay for reckless repairs again. I have also learned a lesson in all of this mess. No more backyard mechanics for any of my vehicles. The will go straight to the dealership for a diagnosis. Then I'll call my backyard mechanic. That's for everything fellas!!!

 

Glad its taken care of. We never stop learning, we all beat vehicals from time too time.