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How it going? My name is ***** ***** I have an 04 Acura MDX…

Customer Question
How it going? My...

How it going? My name is ***** ***** I have an 04 Acura MDX with a idle misfire

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

Valves adjusted to factory specs, new coil packs, new injectors, new spark plugs, new egr valve, egr ports appear to be free and clear..

Submitted: 2 years ago.Category: Acura
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Answered in 42 minutes by:
1/31/2016
Mechanic for Acura: Juan Crespo, Tech Trainer replied 2 years ago
Juan Crespo
Juan Crespo, Tech Trainer
Category: Acura
Satisfied Customers: 1,532
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Verified

Hi there. Welcome to our site!

PLEASE READ THIS FIRST:

If you’re thinking on working on the vehicle yourself, all my knowledge and resources won’t help unless you…

… have basic knowledge and mechanical skills, and…

… have whatever tools and equipment might be needed for a proper diagnosis

Having said that, misfires trigger data trouble codes which are set, recorded and stored by the onboard computer along with a snapshot (freeze-frame) of the basic engine conditions present at the time the event was recorded. Knowing those codes and freeze-frame data will help us help you solve your issue in a more effective manner. Can you get and post that information for us so we can continue?

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Customer reply replied 2 years ago
I do not have diagnostic equipment that can see the data-list. I was going to exhaust my options before I take it to the dealer. Im a 10 year Acura mechanic.. so I have a bit of experience. But as you said, these type of issues are difficult without the proper tools.
Mechanic for Acura: Juan Crespo, Tech Trainer replied 2 years ago

I understand. If it's any help, misfires are caused by lean conditions (more air than fuel in the combustion chamber). Since your engine misfires only at idle, I would take a can of carb cleaner and carefully and slowly spray around all the places where unmetered air might be getting into the engine; places like around the intake manifold, base of the throttle, etc. Also make sure to spray right into the EGR valve; eventhough that's exhaust gas and not technically air, a stuck open EGR can also cause the engine to misfire at idle.

Please let me know what you find.

Best Regards.

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