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I am getting a system too lean readout on my scanner. Trying…

Customer Question
I am getting a...

I am getting a system too lean readout on my scanner. Trying to troubeshoot a very poor running engine.

Mechanic's Assistant: How many miles are on the car? Is it an automatic or a manual transmission?

166,000 f150 with 5.4 triton engine, an automatic tranny

Mechanic's Assistant: What year is your F150?

2001

Mechanic's Assistant: Are you fixing your F150 yourself? What have you tried so far?

Just about anything and everything. Replaced plugs cleaned injectors, ran a smoke test with a tester i made still runs very bad

Submitted: 6 months ago.Category: Ford
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Answered in 5 minutes by:
1/8/2018
Ford Mechanic: Steve, Automotive Expert replied 6 months ago
Steve
Steve, Automotive Expert
Category: Ford
Satisfied Customers: 25,805
Experience: Automotive Expert
Verified

please remote the oil filler cap with the engine running, let me know if there is high suction under the cap

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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