engine loses power
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engine loses power
I've noticed that my 97 4.0 Explorer feels like it's running out of gas sometimes after cruising at highway speeds then slowing down. I have a new fuel filter. Fuel pressure was checked and is good. Car just threw a check engine light- code for O2 sensor. Would a bad O2 sensor make a car run real lean causing it to feel like it was running out of gas?
Cargo Master
Joined: Aug 2003
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From: BC Canada
I've noticed that my 97 4.0 Explorer feels like it's running out of gas sometimes after cruising at highway speeds then slowing down. I have a new fuel filter. Fuel pressure was checked and is good. Car just threw a check engine light- code for O2 sensor. Would a bad O2 sensor make a car run real lean causing it to feel like it was running out of gas?
in short, YES
But you need to complete proper diagnosis to find correct cause.. no guessing, costs $$$$
Cargo Master
Joined: Aug 2003
Posts: 3,263
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From: BC Canada
sensor 1 = first one downstream of engine...
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I hope this solves my lack of power problem. car had full tune up not too long ago. I don't think I have a vacuum leak because I have a smooth idle. plus the lack of power is intermittent. this P0153 code is the only code I got.
Cargo Master
Joined: Aug 2003
Posts: 3,263
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From: BC Canada
I would clean the MAF first, cheap, easy and calculates the volume of air entering the engine... ensure no illegal air between MAF and throttle body...
Recall I advised, test first before spending $$$....
Recall I advised, test first before spending $$$....
Fleet Mechanic
Joined: Feb 2007
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From: Boston, MA
that code alone indicates that there is a 95% chance the sensor is bad......if you have more than 100k on the truck it should be replaced anyways as maintenance
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I just put a new MAF sensor about 2 weeks ago. I got that code. judging by the way these O2 sensors look, I bet they are original. truck has 127,000 on it. That O2 is super tight. my 7/8 O2 socket felt like it was about to strip the sensor. I'm going to bring tuck to friends shop and heat up sensor to loosen. I hope O2 sensor is not seized in there. I was able to turn sensor about 1/4 turn only. After that, it felt real tight.
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I just put a new MAF sensor about 2 weeks ago. I got that code. judging by the way these O2 sensors look, I bet they are original. truck has 127,000 on it. That O2 is super tight. my 7/8 O2 socket felt like it was about to strip the sensor. I'm going to bring tuck to friends shop and heat up sensor to loosen. I hope O2 sensor is not seized in their. I was able to turn sensor about 1/4 turn only. After that, it felt real tight.
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