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My 99 Ranger 3.0 will not go faster than 25 mph. Fuel filter…

Customer Question
My 99 Ranger 3.0...

My 99 Ranger 3.0 will not go faster than 25 mph

Mechanic's Assistant: Are you fixing your Ranger yourself? What have you tried so far?

Yes. Fuel filter and upstream O2 sensors.

Mechanic's Assistant: Have you located all of the vehicle's oxygen sensors? Are the wires leading to and from each intact and in good shape?

Yes replaced the upstream 2 already

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

No codes.

Submitted: 6 months ago.Category: Ford
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Answered in 5 minutes by:
8/5/2017
Ford Mechanic: Dan, Technician replied 6 months ago
Dan
Dan, Technician
Category: Ford
Satisfied Customers: 25,187
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Ford Mechanic: Dan, Technician replied 6 months ago

Is it because vehicle is not shifting or because engine has no power?

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Customer reply replied 6 months ago
The engine loses power at about that speed and will almost die on a hill.
Ford Mechanic: Dan, Technician replied 6 months ago

If you try to rev engine in park/neutral does it act like it has a rpm limiter such as not wanting to go above 3000 rpm?

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Customer reply replied 6 months ago
If I rev it up it will act normal. It is only driving that there is an issue.
Ford Mechanic: Dan, Technician replied 6 months ago

Flex fuel vehicle?

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Ford Mechanic: Dan, Technician replied 6 months ago

Also, automatic or 5 speed?

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Customer reply replied 6 months ago
automatic
Ford Mechanic: Dan, Technician replied 6 months ago

Unplug the mass airflow sensor and take for a drive, let me know if that helps.

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Customer reply replied 6 months ago
where is that?
Customer reply replied 6 months ago
by the air filter assembly?
Ford Mechanic: Dan, Technician replied 6 months ago

In the air filter housing. Also check to see if check engine light comes on when first turning key to on position for bulb check. Thanks.

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Customer reply replied 6 months ago
no change in performance. Bulb is working.
Ford Mechanic: Dan, Technician replied 6 months ago

Completely remove front oxygen sensor from exhaust and see if it drives better with oxygen sensor removed. If not check compression of all the cylinders and let me know what they are. Thanks.

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Customer reply replied 6 months ago
There are 2 oxygen sensors and I don't have the tools to take them out or check compression.
Ford Mechanic: Dan, Technician replied 6 months ago

You can buy a oxygen sensor removal tool from parts store for around $10 and compression tester for around $20. These are going to be the next steps that are going to be needed to figure out problem. Let me know how it goes, thanks.

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Ford Mechanic: Dan, Technician replied 6 months ago

Ever get it figured out? Thanks.

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