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roybelding
roybelding, ASE Certified Technician
Category: Jeep
Satisfied Customers: 5298
Experience:  My knowledge of Jeeps from the early 60's till present. Love to help people with there issues.
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Grand cherokee: 1997 jeep grand Cherokee 5.2. Failed emission

Customer Question

1997 jeep grand Cherokee 5.2. Failed emission test due to lean burn. What is causing it to run so lean. No codes showing.
Submitted: 1 year ago.
Category: Jeep
Expert:  roybelding replied 1 year ago.
good afternoon my name is ***** ***** I will assist
can you check fuel pressure??
do you have a scan tool and can you read long term trims???
these values would help get to the bottom of the problem
Roy
Customer: replied 1 year ago.
can't check fuel pressure, can check with scan tool
Expert:  roybelding replied 1 year ago.
ok, what is the long term trims while running????
what were the readings that caused your failure???
you can rent a fuel pressure tester at a parts store to get this value
Roy
Customer: replied 1 year ago.
I'll scan it and get back to you, thanks.
Expert:  roybelding replied 1 year ago.
ok