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Old 05-23-2017, 10:28 PM
Rusty Accord Rusty Accord is offline
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Re: 99 accord lx v6 rough idle, engine power stuttering

Originally Posted by haoleflip View Post
Hey guys, it's been a while since I had to come here for help on issues cause my car has been running great until now!

I have a sort of rough idle and whenever I drive I sometimes lose acceleration power completely for a few seconds and I have to push the gas harder to get acceleration going again. Engine is throwing me and every shop I go to (been to 3 different ones) P0401 EGR valve code. I have replaced the EGR valve twice, along with cat and O2 sensors. The first EGR valve I bought I thought was bad, since the issue persisted after I installed it, so I bought another brand new and still having the issue. The code also says that it could be a blocked line that leads to the EGR valve, so I took off all of the lines I could see and sprayed air through them and they all seem fine. I don't know what else could be the problem! Help!
It sounds like you'll have to pull the upper part of the intake manifold, and clean the EGR port. I only say that, as just replacing or blowing air thru it won't do it. I don't have any experience on the V6 engine, but on the I4 engine you separate the upper so you can get to the spot where the build up is. Then you clean both passages.
When I did it on my wife's 00Accord, I had to replace the valve after cleaning the port (I did it before too, but it was a bad one). Since then, no engine codes have come up.

Last edited by Rusty Accord; 05-23-2017 at 10:30 PM.
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