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lean idle?


basshead

New Member
TRS Banner 2012-2015
Joined
Oct 4, 2010
Messages
195
Reaction score
0
Points
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Location
Calgary Alberta
Vehicle Year
1998
Make / Model
ford
Engine Size
4.0 bored
Transmission
Automatic
I have a 98 ranger ohv 4.0, a new crate motor was swapped in 1.5 years ago, has 20xxx ish kms now.

Anyways couple weeks ago, engine threw a code and was feeling low on power, based on the symptoms, I changdd the fuel filter, cleared the code and it ran fine for a week, then the engine threw another code. Got it looked at it was "bank 1 bank 2 lean"..
The guy said one of the o2 sensors is shot..
So I got the code cleared and it has been running worse each day, it starts fine ONLY when the.engine cools down, once It warms up in park, the engine idles low almost stalling,then revs.high trying to fix it then low then high, untill I put it in drive then it drives good. But if I stop and push the gas to go it sometimes stalls, and stalling is getting more frequent as days go by. Can someone tell me what o2 sensor would it be?

Also when I start driving from a start, after I get going it drives fine, no power loss no hesitating only when stopped trying to go, or in park idling does it run weird
 
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