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K. Wiggins
K. Wiggins, Hyundai Technician
Category: Hyundai
Satisfied Customers: 2435
Experience:  Asian Import Specialist, ASE Certified Technician AA in automotive Technology, 15+ years in the trade
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2003 santa fe 2.7l misfire P0301 rough idle, new plugs and

Customer Question

2003 santa fe 2.7l misfire P0301 rough idle, new plugs and wires already
JA: Is the rough idle intermittent or consistent?
Customer: consistent
JA: Are you fixing your Santa Fe yourself? What have you tried so far?
Customer: yes, plugs and wires replaced
JA: Anything else you want the mechanic to know before I connect you?
Customer: 180,000 miles
Submitted: 1 month ago.
Category: Hyundai
Expert:  K. Wiggins replied 1 month ago.

Hello, at 180k the first thing I would do is run a compression check. If you don't have a compression gauge you can borrow one with a deposit at most parts stores. Here's how to do it all cylinders should be within 10% of each other.

If compression checks good get a mechanics stethoscope and listen to the injector and see if you can hear it clicking.

Let me know what you find and we can work further if needed.