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I HAVE A 4.2 IT HAVE NO POWER AND HESITADE AT ACCELARATION

Customer Question
NO CK ENGINE LIGTH JA: Is...
I HAVE A 4.2 IT HAVE NO POWER AND HESITADE AT ACCELARATION NO CK ENGINE LIGTH
JA: Is the power loss consistent, or does it fluctuate?
Customer: CONSISTENT
JA: What is the model/year of your Ford?
Customer: 2000 F150 4.2
JA: Are you fixing your F150 yourself? What have you tried so far?
Customer: YES I REPLACE TRANSMISSION
JA: Anything else you want the mechanic to know before I connect you?
Customer: NO JUST THAT
Submitted: 1 year ago.Category: Ford
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Answered in 2 minutes by:
11/17/2016
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 1 year ago
AMEDEE
AMEDEE, FORD TECHNICIAN
Category: Ford
Satisfied Customers: 26,795
Experience: ASE CERTIFIED TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
Verified

Hello and welcome!

My name is ***** ***** I can assist you with your question.

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Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 1 year ago

Are you looking for possible causes?

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Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 1 year ago

NO problem.

I will be happy to help!

Here are the three most likley possible causes

1. Mass air flow sensor

2. Low fuel pressure

3. Plugged exhaust.

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Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 1 year ago

I am glad I can help!

It has been a pleasure working with you. Please dont forget to honor your good faith deposit by rating my answer as "5 STAR SERVICE" for assisting you today.

Keep in mind, we can still continue this conversation at no further cost to you even after you rate my answer. Just reply back to me using this page and I will get it and get back to you ASAP!

Also, if you are a member or if you have a subscription to the site, you still need to rate my answer in order for me to get credit for assisting you with your question.

Please let me know if you have any further questions.

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Customer reply replied 1 year ago
I replaced mass air flow sensor and fuel filter and exhaust is free flow
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 1 year ago

Excellent!

What is the oxygen sensor readings at under a load?

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Customer reply replied 1 year ago
that I have no idea
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 1 year ago

How about exhaust back pressure or fuel pressure?

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Customer reply replied 1 year ago
the engine revs real good in parking but when you put it in drive it has no power
and it have slow take off
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 1 year ago

Right, this is most likley caused by a sever lean condition.

You can also check the air intake snorkle from the mass air flow sensor to the throttle body to ensure it is not cracked or ripped in anyway.

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Customer reply replied 1 year ago
I did and I also spray starting fluid on top of all the vacuum lines on intake and no changes
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 1 year ago

Ok, excellent!!

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Customer reply replied 1 year ago
what I do next?
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 1 year ago

Check the fuel pressure.

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Customer reply replied 1 year ago
ok ill di that tomorrow
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 1 year ago

Sounds good!

I am glad I can help!

Please dont forget to rate!

Have a great night!

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Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 12 months ago

Hello! It's Amedee from just answer.

I am just checking in to see if you need any further assistance?

Let me know!

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AMEDEE
AMEDEE
AMEDEE, FORD TECHNICIAN
Category: Ford
Satisfied Customers: 26,795
26,795 Satisfied Customers
Experience: ASE CERTIFIED TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector

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