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Old September 23rd, 2013, 05:48 PM   #1
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2003 AV6 6MT hesitation / rough idle -HELP

I'm brand new to this forum and new to the accord world. I previously had a total of 7 mustangs and a few others. So these v6's are a new deal to me. Anyways, I just bought my car which is a 2003 V6 accord with the 6 speed. It has 116000 miles and I paid $4,400 for it. I noticed when I got home, the car shakes / hesitates when under stress. (50% throttle or more) I just changed the plugs and it seemed to help it a little bit. But it's very weird to me. I was wondering if anyone else has experienced this problem with their car? Or if anyone else knows how to fix it? Or if anyone has any input that could help me out!
Thanks
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Old September 23rd, 2013, 05:50 PM   #2
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changed the timing belt? Valve adjustment? Clean out the TB and IM?
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Old September 23rd, 2013, 06:18 PM   #3
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If you need coil packs I have some FS.
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Old September 23rd, 2013, 06:21 PM   #4
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can also be blown engine mounts
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Old September 23rd, 2013, 06:29 PM   #5
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Unplug each coil, one at a time, and see if the engine changes. If you find one, switch it with another, to rule out the plug.
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Old September 23rd, 2013, 10:16 PM   #6
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Vibration under load only and if it goes away not under load, is a classic symptom of a bad CV axle/joint. Common on these cars. I replaced the drivers side axle several months ago when I purchased the car

That is if you mean shaking when moving. If its when parked, then its something else
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Old September 23rd, 2013, 10:54 PM   #7
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Vibration under load only and if it goes away not under load, is a classic symptom of a bad CV axle/joint. Common on these cars. I replaced the drivers side axle several months ago when I purchased the car

That is if you mean shaking when moving. If its when parked, then its something else
You don't mind showing a diagram of the CV axle/joint? Parts # from any site is fine. Thanks.
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Old September 23rd, 2013, 11:40 PM   #8
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any check engine lights?
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Old September 24th, 2013, 08:24 AM   #9
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You don't mind showing a diagram of the CV axle/joint? Parts # from any site is fine. Thanks.
im guessing its this. drive shaft assembly l/r

http://www.hondapartssales.com/lisle...s=&view=normal
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Old September 24th, 2013, 09:40 AM   #10
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Have you tried resetting the ECU yet? Also, like they said above, check the condition of your axles and motor mounts.
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Old September 24th, 2013, 09:54 AM   #11
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changed the timing belt? Valve adjustment? Clean out the TB and IM?
I'm unsure of the timing belt. And I thought valve adjusments were only for the 4cyl cars. I read that these were hydraulic. I have not cleaned the TB yet. But what is an IM? sorry I'm not use to all of these terms yet.

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can also be blown engine mounts
I looked at them and they all seemed to be fine.. but it might be best to get a second opinion

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Unplug each coil, one at a time, and see if the engine changes. If you find one, switch it with another, to rule out the plug.
Thats a great idea. I will try this probably tomorrow.

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Originally Posted by mc1114 View Post
Vibration under load only and if it goes away not under load, is a classic symptom of a bad CV axle/joint. Common on these cars. I replaced the drivers side axle several months ago when I purchased the car

That is if you mean shaking when moving. If its when parked, then its something else
Yes its only when it's under load. And what all did you replace to fix the issue? And did you experience the same symptoms as I did before you replaced it?

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any check engine lights?
No check engine lights.

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Originally Posted by B.R.03ex View Post
Have you tried resetting the ECU yet? Also, like they said above, check the condition of your axles and motor mounts.
I have not reset the ecu yet. I will certainly give that a try. I have checked the engine mounts and from what I can tell they look alright. I honestly don't know what to look for when inspecting the axles and cv joints.


Thank you all for your input!!
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Old September 24th, 2013, 09:56 AM   #12
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What about RPMs bouncing?
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Old September 24th, 2013, 10:00 AM   #13
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What about RPMs bouncing?
Are you asking if the RPM's are bouncing? If you are, the RPM's are not bouncing.
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Old September 24th, 2013, 10:05 AM   #14
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feel any weight shift from acceleration and stopping?
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Old September 24th, 2013, 10:17 AM   #15
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feel any weight shift from acceleration and stopping?
I would say no. But if there were, what would this indicate?
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Old September 24th, 2013, 10:38 AM   #16
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like after you acclerate from a stop do you feel like something heavy move and same thing when you stop
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Old September 24th, 2013, 11:09 AM   #17
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like after you acclerate from a stop do you feel like something heavy move and same thing when you stop
I do not. Everything seems ok as far as stuff moving around.
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Old September 24th, 2013, 11:11 AM   #18
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if it only happens while accelerating at 50 percent or more throttle and not while braking or regular accel, then post a video of it so we can see it. You say the engine hesitates, like it is stumbling? or is it vibration from the chassis?
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Old September 24th, 2013, 12:25 PM   #19
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if it only happens while accelerating at 50 percent or more throttle and not while braking or regular accel, then post a video of it so we can see it. You say the engine hesitates, like it is stumbling? or is it vibration from the chassis?
Around 50% or more, I don't know the exact point. It's not when I'm coasting(off the gas) or braking. Only under acceleration. I feel like it's vibration from the chassis. At first I thought it could have been a slight misfire and thats why I went ahead and did the plugs. But I will try to get a video up tonight to show everyone.
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Old September 24th, 2013, 03:10 PM   #20
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I changed the drivers side and it fixed the problem. After much reading, that side seems to be more common to become defective. The old axle didn't have any obvious signs of wear or wobble. I was lucky I got it right the first time. My symptom was the typical "vibration only under load"
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Last edited by mc1114; September 24th, 2013 at 03:21 PM..
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Old September 24th, 2013, 04:32 PM   #21
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I changed the drivers side and it fixed the problem. After much reading, that side seems to be more common to become defective. The old axle didn't have any obvious signs of wear or wobble. I was lucky I got it right the first time. My symptom was the typical "vibration only under load"
Did you replace everything with the drive shaft? all of the little parts too? or just the drive shaft?
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Old September 24th, 2013, 04:39 PM   #22
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Did you replace everything with the drive shaft? all of the little parts too? or just the drive shaft?
I don't know what little parts you're talking about. I just replaced the whole axle with an aftermarket part
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Old September 24th, 2013, 04:56 PM   #23
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The old half shafts came as one unit, spline to spline, with new boots and everything. Were/are your boots ripped??
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Old September 24th, 2013, 07:31 PM   #24
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I don't know what little parts you're talking about. I just replaced the whole axle with an aftermarket part
Oh ok. And did you do this your self or have a shop do it?
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Old September 24th, 2013, 07:32 PM   #25
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The old half shafts came as one unit, spline to spline, with new boots and everything. Were/are your boots ripped??
Oh ok thank you! I have not checked yet. I will check tomorrow
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Old September 24th, 2013, 07:45 PM   #26
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Oh ok. And did you do this your self or have a shop do it?
I work at a shop so I do all the work myself
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Old September 24th, 2013, 08:01 PM   #27
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I work at a shop so I do all the work myself
Would this be tough for a normal person to try to do? I have access to a lift and air tools and jacks.
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Old September 24th, 2013, 08:09 PM   #28
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Should not be tough if you have access to shop equipment and tools
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Old September 25th, 2013, 03:53 AM   #29
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Try this, Lift the vehicle up off the ground and support by lift or stands. The ABS will throw a code but that's ok. While in the air put trans into gear and rev up to around the engine speed you usually notice the problem. Listen for any abnormal sounds while spinning the wheels and take note of any vibration. Gradually increase speed and do not gun it or top it out.
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Old September 25th, 2013, 05:33 AM   #30
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Should not be tough if you have access to shop equipment and tools
Ok great. Thank you again for your help!

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Try this, Lift the vehicle up off the ground and support by lift or stands. The ABS will throw a code but that's ok. While in the air put trans into gear and rev up to around the engine speed you usually notice the problem. Listen for any abnormal sounds while spinning the wheels and take note of any vibration. Gradually increase speed and do not gun it or top it out.
This is a cool idea, I will definitely give this a try once I can get on the lift.
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