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No power pulling small hills. 99 ford v10 6.8. showing

Customer Question
No power pulling small...

No power pulling small hills. 99 ford v10 6.8. showing p1130,p1131,p1132

Mechanic's Assistant: Is the power loss consistent, or does it fluctuate?

Fluctuates

Mechanic's Assistant: What is the model of your '99 Ford?

Motorhome class a

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

Just scanned so far. hope its an east fix..

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

Just that I was recently in real cold weather. now I am in a little warmer weather

Submitted: 7 months ago.Category: Ford
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Answered in 8 minutes by:
12/30/2017
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
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Did the codes, check engine light, and low power all come on about the same time?

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Customer reply replied 7 months ago
check engine light does not come on. just loss of power on small hills.
Customer reply replied 7 months ago
no thanks
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

Monitor the long term fuel trims with a scan tool, if fuel trims are high (over 10%) at idle only, but come down when reved up, suspect a vacuum leak. Use short term fuel trims while spraying carb cleaner around all intake areas and vacuum lines, if fuel trims drop into negative numbers in any particular area or if the rpms change, suspect that area as a leak. PCV hose, and upper intake gaskets are common. If fuel trims are fine at idle, but are excessively high during acceleration or cruising speeds, suspect fuel concern, or mass air flow input concern. Short term trims should be +/-10 and long term +/-20. You want them around 0 as much as possible at idle or steady load. Check fuel pressure during the concern, if fuel pressure drops below 30 PSI during low power concern. Check power and ground to the fuel pump during the concern. If okay, suspect plugged fuel filter or weak pump. If the fuel pressure does not drop during a lack of power or high fuel trim event, check the mass air flow voltage. In most cases, normal voltage will be .6 to .9 volts at idle. In most cases, if the mass air flow is the cause of the lean condition, unplugging the mass air flow sensor and road testing can be an effective means of diagnosing. If concern is still present with the mass air flow sensor unplugged, it is unlikely the mass air flow sensor is the cause. Can you do these checks.

Now that I have posted a partial or complete answer, you will see you can rate me. The deposit you have already paid is not transferred to me until you rate me. I would like to receive nothing less than 5-star excellent ratings. So if we are not there yet, please reply and let me help more. If you're not pleased, let me know because rating bad does not result in a refund, there are better options. Rating now will not close this post nor prevent replying. Thanks Chris

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Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

Hello, Chris here again,

I am checking in to make sure you got everything you expected from my answer. The option to rate my response or reply is still available. I want to make sure you were pleased with what you paid for.

Thanks Chris

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