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Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 24581
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Misfire at idle changed egr valve and tube spark plugs and

Customer Question

Misfire at idle changed egr valve and tube spark plugs and wires got a p0455 code
JA: Have you seen the misfire code before? Has the car been stalling?
Customer: No misfire codes and no just misfire at idle maybe fluctuations between 600rpms to 900rpms
JA: What is the model/year of your Chevy?
Customer: 2008 Chevy equinox ls 3.4 awd
JA: Are you fixing your Equinox yourself? What have you tried so far?
Customer: Yes myself, and plugs ngk iridium with wires , egr valve and tube that's it so far
JA: Anything else you want the mechanic to know before I connect you?
Customer: No that's it I think
Submitted: 2 months ago.
Category: Chevy
Expert:  Dan replied 2 months ago.

Hello, my name is ***** ***** I'm here to help get your problem solved.

Expert:  Dan replied 2 months ago.

Have you tried to clean out throttle body?

Customer: replied 2 months ago.
Expert:  Dan replied 2 months ago.

Did misfire and P0455 come around the same time?

Customer: replied 2 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
Expert:  Dan replied 2 months ago.

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

Customer: replied 2 months ago.
has been gone since I replaced the valve and doesn't seem to matter how much fuel is in the tank
Expert:  Dan replied 2 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.

Expert:  Dan replied 2 months ago.

Ever get it figured out? Thanks