98CoupeV6

DESCRIPTION AND OPERATION

The EGR system is designed to reduce oxides of nitrogen emissions (NOx) by recirculating exhaust gas through the EGR valve and the intake manifold into the combustion chambers. It is composed of the EGR valve, EGR vacuum control valve, EGR control solenoid valve, ECM/PCM and various sensors.

The ECM/PCM contains memories for ideal EGR valve lifts for varying operating conditions. The EGR valve lift sensor detects the amount of EGR valve lift and sends the information to the ECM/PCM. The ECM/PCM then compares it with the ideal EGR valve lift which is determined by signals sent from the other sensors. If there is any difference between the two, the ECM/PCM cuts current to the EGR control solenoid valve to reduce vacuum applied to the EGR valve.

SYMPTOM: An engine hesitation or stumble can be felt under light acceleration between 1,500 and 2,000 rpm.

PROBABLE CAUSE: Carbon build-up has restricted the EGR ports into the intake manifold runners.

CORRECTIVE ACTION: Clean the carbon out of the EGR ports.

Cars and Engines Applicable To - More will be added if found. Please add your own if you have a good how-to on it.

90-93 Honda Accord F22
98-02 Honda Accord J30A1

AccordSedan94

I have that same stubbling on my car. Halla back at me.

S4gunn

I think I'm going to try the diagnostic procedure outlined in the Honda TSB first but here are two more sites with other explanations of the EGR port cleaning procedure. Please post what your results were.

From about.com

Tech2Tech TSB (has photos)


-g

98CoupeV6

WTF

98CoupeV6

Nice finds. The TSB I posted for the 90-93 is a little fuzzy anyway and not explained as well as the 98-02 TSB. Good luck and try to take some pics if you can :thumbup:

86 accord lxi

I am a newbie here.
I am usually on www.3geez.com
does anybody have a "how to" on cleaning the egr port on a
3rd gen accord lxi?

accord99v6

I have cleaned the port successfully without removing the throttle body.
I got the EGR flow message when OBD 'd. I will post some pictures later as a rough tutorial so you dont have to be porked by the dealer. Very easy job. and my car drives better than when I bought it.



Accord V6 '99 3.0L 114,000mi

98CoupeV6

To properly clean the port you have to remove the intake manifold. Your light is just going to come on again in the near future.

oholdeno

are there any how-to's on the 6gen accord v6?

98CoupeV6

I've posted it many times. Do yourself a favor and buy the Helms service manual. All you have to do is remove the throttle body and intake manifold and it'll be painfully obvious which one is the EGR port.