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Misfire at idle changed egr valve and tube spark plugs and…

Customer Question
Misfire at idle changed...

Misfire at idle changed egr valve and tube spark plugs and wires got a p0455 code

Mechanic's Assistant: Have you seen the misfire code before? Has the car been stalling?

No misfire codes and no just misfire at idle maybe fluctuations between 600rpms to 900rpms

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

2008 Chevy equinox ls 3.4 awd

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

Yes myself, and plugs ngk iridium with wires , egr valve and tube that's it so far

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

No that's it I think

Submitted: 11 months ago.Category: Chevy
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Answered in 4 minutes by:
7/29/2017
Chevy Mechanic: Dan, Technician replied 11 months ago
Dan
Dan, Technician
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Satisfied Customers: 25,965
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Hello, my name is ***** ***** I'm here to help get your problem solved.

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Chevy Mechanic: Dan, Technician replied 11 months ago

Have you tried to clean out throttle body?

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Chevy Mechanic: Dan, Technician replied 11 months ago

Did misfire and P0455 come around the same time?

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Customer reply replied 11 months ago
I bought the car in the condition it's in and the p0455 was present when I puchased and so was the misfire along with an egr valve code
Chevy Mechanic: Dan, Technician replied 11 months ago

EGR code is gone now? Does how much fuel is in tank seem to effect misfire at all?

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Customer reply replied 11 months ago
has been gone since I replaced the valve and doesn't seem to matter how much fuel is in the tank
Chevy Mechanic: Dan, Technician replied 11 months ago

Remove purge valve and block off lines, let me know if this allows it to run better. This is only thing that would cause p0455 to be related to misfire. Let me know, thanks.

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Chevy Mechanic: Dan, Technician replied 10 months ago

Ever get it figured out? Thanks

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