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STEP ON GAS BOGS DOWN LIKE THEY DO IN PARK WHEN YOU STEP IT…

Customer Question
STEP ON GAS...

STEP ON GAS BOGS DOWN LIKE THEY DO IN PARK WHEN YOU STEP IT DOWN AND THE REV LIM KICKS IN

Mechanic's Assistant: Has the vehicle turned into a gas hog? And how does it start -- same as usual?

NO AND STARTS GREAT

Mechanic's Assistant: What is the model/year of your Jeep?

05 LIB 3.7

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

YES 02 SENSOR PLUGS COIL PACKS

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

CONVERTS ARE NOT PLUGED

Submitted: 3 months ago.Category: Jeep
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Answered in 1 hour by:
3/24/2018
Jeep Mechanic: Canuck Tech, Technician replied 3 months ago
Canuck Tech
Canuck Tech, Technician
Category: Jeep
Satisfied Customers: 704
Experience: 20 years experience in tune up, electrical and general repair
Verified

Hi there - This sounds like a fuel delivery issue. Do you have access to a scan tool that can read live data?

Off the top of my head, I would want to know about fuel delivery. It could be relatively simple, like a fuel filter, but that isn't so simple. The filter is probably part of the fuel pump / regulator / sender asembly. I'll check on that.

Live data would be helpful - specifically, I would like t know long and short term fuel trim numbers at part throttle when it bogs

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Customer reply replied 3 months ago
Checked fuel pressure stayed at 50 lb
Jeep Mechanic: Canuck Tech, Technician replied 3 months ago

Does it stay at 50 when it bogs?

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Jeep Mechanic: Canuck Tech, Technician replied 3 months ago

Any codes?

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Jeep Mechanic: Canuck Tech, Technician replied 3 months ago

There have been some reports of crank sensor wiring issues, and the computer ends up "thinking" the rpm is higher than it is, and therefore limits the RPM, like you are hitting the rev limit in park or neutral... worth a shot, based upon symptoms

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Customer reply replied 3 months ago
Stays at 50 showed o2 replaced that
Jeep Mechanic: Canuck Tech, Technician replied 3 months ago

O2 sensor "low voltage" by chance?

Do you have access to a scan tool that can read live data?

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Canuck Tech, Technician
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