What can cause a hesitation? Honda techs cant find it

GERAR

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19 POSTS

Also, my intake temp is running. Around 160 to 170 degrees f. Is that normal? I hear it should be 120 max

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Saturday, June 23rd, 2012 AT 6:59 PM

KHLOW2008

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Our database does not have the range specifications but for testing, it is stated as more than 356 degrees than you have a problem so I don't think there is any fault here. IAT is with ambient temperature so it ranges accordingly.

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Monday, June 25th, 2012 AT 3:41 AM

GERAR

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Can you also look at the egr err? It seems to show up when the car fails

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Monday, June 25th, 2012 AT 11:25 AM

GERAR

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Again, thank you very much for your time! :)

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Monday, June 25th, 2012 AT 11:28 AM

KHLOW2008

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Seems like the EGR is the one causing the problem. When it occurs, the ignition timing is retarded drastically.

Try unplugging the EGR and test if the problem goes away.

I have encountered EGR problems that does not trigger any trouble codes and so far cleaning and replacement (with used parts) the system did not solve the problem and I am still waiting for the owner to send the vehicle back for more testings.

The engine seems to hesitate at the rpm range of 1,200 to 2,500 at slow or constant throttle opening.

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Monday, June 25th, 2012 AT 5:09 PM

GERAR

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I disconnected the egr, and ran the car for 1 hr.
Results:

The hesitation still present
The loss of power improved (not as bad)
The check engine light did not turn on at all
the egr err 99.2% is not active any more. No egr err percentage is being displayed

Do you think that the egr valve is not closing properly and this is why I atill have the hesitation? Keep in mind that the egr err 99.2% is gone now that the egr is unplugged.

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Tuesday, June 26th, 2012 AT 1:59 PM

KHLOW2008

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Yes, it is possible. Try cleaning the EGR and its passages to see if it helps.

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Tuesday, June 26th, 2012 AT 2:18 PM

AYRTON3

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@GERAR Did you find the cause of the hesitation since my civic has the same problem? Thanks for your help.

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Thursday, October 12th, 2017 AT 4:40 PM

MHPAUTOS

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31,937 POSTS

If I may add my 2 BOB's worth here. Looking at the data in earlier posts, I would be inclined to replace the EGR as it appears to be reacting slow to demand, the actuator may be sticky, personally I don't much go for cleaning as it's very hard to ensure all the carbon is gone and and if knobs of carbon remain and dislodge, you can be back to where you started with a possible EGR flow issue, I am not saying don't clean it as a test mode, but if that looks to do the job I would be replacing to make sure.