Power loss

[Joshua719]

I recently moved from Ohio to Colorado and my 09' XLT 4x4 Ranger has an extreme loss of power and fuel economy. I had a code for MAF sensor intermittent, I replaced with no change in symptoms but code is gone. I replaced the TPS and it seemed to make a little difference at first but back to same symptoms and still no codes... I was going to replace 02 sensor next.

 

[MaicoDoug]

Bumped....
Have you considered a plugged CAT? Simple test is to tape a shop rag to the exhaust pipe & hit the throttle. It should blow sideways showing plenty of flow. I'm 2 years behind you. Where abouts did you land in CO?

 

[gaz]

What is your elevation

 

[sgtsandman]

Gaz has a point. That can be a big change in altitude and can cause problems. What octane fuel are you using? There will probably be other questions that need answered to walk you through the troubleshooting.

 

[Joshua719]

Thank you, I will try that. Im in Colorado Springs. Im from Colorado but had lived in Columbus

What is your elevation

Bumped....
Have you considered a plugged CAT? Simple test is to tape a shop rag to the exhaust pipe & hit the throttle. It should blow sideways showing plenty of flow. I'm 2 years behind you. Where abouts did you land in CO?

What is your elevation

Im at about 6,500 ft so thats about 5,500 ft elevation increase from Ohio. I thought about it but didnt think it was as big an issue as with a carburetor engine. What can be done to correct or adjust if this is the case.

What is your elevation

 

[Brain75]

my experience with big altitude changes on pretty much all the computerized ones is either A) they adapt fine with no issues B) you have to unplug the computer (battery) for 1/2 hour to 12 hours to get them to forget everything and then start over. (My OBD2 GM is in the latter category - it will throw lean codes all day long till you unplug and let it reset.)

C-Springs has gotten huge - the far west is 9000+ ft elevation and the lowest is 5700 so lower than Denver and lower than where you typically start having problems.
idaho springs (totally different tiny mountain town west of denver) is 7520 +/- and that is where you generally start seeing 85 octane gas sold and issues with computers both, so it really all depends on where you are in the C-Springs I would say.

MAF in a few vehicles I have touched (especially my GM) will cause a loss of economy - in my case drastic. Problem is new MAF's are 50/50 chance of getting crap part. Might have fixed the code but not fixed anything really, dunno on that one.

Before you throw parts at it like crazy, get the codes and relay em to us and we can help you diagnose most every part before just replacing. If you have absolutely no codes at all I'd go the forscan + cable route and look at long term and short term fuel trims, should show if the computer is going wonky trying to adapt.