I own a 1999 Accord 3.0 V-tech with about 200,000kms. The car has been well maintained with mostly OEM parts. I have an intermittent problem that I cannot figure out. It started as an occasional hesitation from a standstill. The up-stream O2 sensor was changed, but it did not correct the problem. Then ignition wires, cap, rotor & spark plugs were replaced with premium quality parts, still had the problem. A scan revealed multiple miss-fires on all cylinders. The igniter and ignition coil were changed, no solution. The EGR valve was changed 3 years ago, it was removed and inspected, no clogging.

The problem only appears when the engine is at operating temperature, and you do a lot of stop-start driving. It does not manifest itself at all when high-way driving, even after several hours. In stop-start driving, it becomes worse if you mash the accelerator. But you can still drive if you play with the pedal. Two garages and a dealership have not been able to figure it out.

Can someone help me?

Thanks, Marc D

 

Hi Member..You started out your post's in the wrong forums, so I moved you over to here where your reading this now...Always try to post in the correct forums for answers.

WheelBrokerAng

 

The EGR valve itself is not where the soot clogging occurs;
http://hondadude.webs.com/sb99085EGR.gif

I wouldn't worry about installing the "pipe kit", but clear the port where the intake manifold meets the channel from the EGR valve.

 

Hey HondaDude,

Thanks for the reply. I checked the passage that leads from the EGR valve to the manifold and it looked clear. I will check again, (perhaps un-bolt it) and see if there is any clogging.

Thanks. Any other suggestions are most welcome.