Help!!! Rough Idle
#1
Registered User
Thread Starter
Join Date: Oct 2009
Location: Stouffville, Ontario
Posts: 47
Likes: 0
Received 0 Likes
on
0 Posts
Help!!! Rough Idle
Hello All,
I am currently having rough idle problem with a 2005 RX8 GT Automatic which I bought a few months ago.
I was first having very rough idle about 3 weeks ago and I took it to the dealer and they said it needed motor mounts because they were completely worn out. (At the same time they were repairing a CEL which needed the catalytic converter and rear oxygen sensor replaced).
So, $700 later, the mounts were installed and the car idled as smooth as silk up until about 1 week ago. The problem is not as bad as before the motor mounts were installed but its rougher than when they were first installed.
Would the motor mounts wear out in a matter of a few weeks?
Is it possible that one of the mounts is faulty?
Any help will be greatly appreciated.
On another note, today I had to take it in for another CEL and they replaced the FRONT oxygen sensor. Another $700.
I am currently having rough idle problem with a 2005 RX8 GT Automatic which I bought a few months ago.
I was first having very rough idle about 3 weeks ago and I took it to the dealer and they said it needed motor mounts because they were completely worn out. (At the same time they were repairing a CEL which needed the catalytic converter and rear oxygen sensor replaced).
So, $700 later, the mounts were installed and the car idled as smooth as silk up until about 1 week ago. The problem is not as bad as before the motor mounts were installed but its rougher than when they were first installed.
Would the motor mounts wear out in a matter of a few weeks?
Is it possible that one of the mounts is faulty?
Any help will be greatly appreciated.
On another note, today I had to take it in for another CEL and they replaced the FRONT oxygen sensor. Another $700.
#3
Registered User
Thread Starter
Join Date: Oct 2009
Location: Stouffville, Ontario
Posts: 47
Likes: 0
Received 0 Likes
on
0 Posts
No, the check engine light is now off since I picked it up today. The car currently has 106,000km and the ignition coils and plugs were replaced at 96,000km.
#4
Registered
Join Date: Jul 2004
Location: Northern California
Posts: 2,196
Likes: 0
Received 0 Likes
on
0 Posts
You might look under the hood in the dark and see if any of your spark-plug wires are arcing. They should be checked and if they are the originals should be replaced. Rubber gets very brittle when used in a HOT environment. Have you cleaned your MAF sensor?
#8
My 8 looks like a Smurf
iTrader: (4)
Join Date: Sep 2007
Location: Ottawa, ON, Canada
Posts: 1,742
Likes: 0
Received 0 Likes
on
0 Posts
I had the same issue for a long time. I am pretty sure it was my ignition coils as the problem has been pretty constant but I haven't seen it since I put in the BHR Ignition kit [2 weeks].
#14
His 8
iTrader: (1)
Join Date: Feb 2009
Location: Leander, Tx
Posts: 381
Likes: 0
Received 0 Likes
on
0 Posts
Hello All,
I am currently having rough idle problem with a 2005 RX8 GT Automatic which I bought a few months ago.
I was first having very rough idle about 3 weeks ago and I took it to the dealer and they said it needed motor mounts because they were completely worn out. (At the same time they were repairing a CEL which needed the catalytic converter and rear oxygen sensor replaced).
So, $700 later, the mounts were installed and the car idled as smooth as silk up until about 1 week ago. The problem is not as bad as before the motor mounts were installed but its rougher than when they were first installed.
Would the motor mounts wear out in a matter of a few weeks?
Is it possible that one of the mounts is faulty?
Any help will be greatly appreciated.
On another note, today I had to take it in for another CEL and they replaced the FRONT oxygen sensor. Another $700.
I am currently having rough idle problem with a 2005 RX8 GT Automatic which I bought a few months ago.
I was first having very rough idle about 3 weeks ago and I took it to the dealer and they said it needed motor mounts because they were completely worn out. (At the same time they were repairing a CEL which needed the catalytic converter and rear oxygen sensor replaced).
So, $700 later, the mounts were installed and the car idled as smooth as silk up until about 1 week ago. The problem is not as bad as before the motor mounts were installed but its rougher than when they were first installed.
Would the motor mounts wear out in a matter of a few weeks?
Is it possible that one of the mounts is faulty?
Any help will be greatly appreciated.
On another note, today I had to take it in for another CEL and they replaced the FRONT oxygen sensor. Another $700.
#16
Grasshopper
iTrader: (1)
First you can read through this thread where I helped someone else on using a volt meter:
https://www.rx8club.com/showthread.p...ighlight=fluke
This can tell you if the coil is bad, but can be difficult to tell if the coil is going bad.
But for you, it'll be easier to buy an inline ignition checker.
Basically, you install it between the spark plug and the wire boot.
Start the car and observe the timing light.
Do this for all four coils/plugs and see if one light appears dimmer or inconsistent with spark timing (or simply put, one doesn't look like the others).
Here is what one looks like:
https://www.rx8club.com/showthread.p...ighlight=fluke
This can tell you if the coil is bad, but can be difficult to tell if the coil is going bad.
But for you, it'll be easier to buy an inline ignition checker.
Basically, you install it between the spark plug and the wire boot.
Start the car and observe the timing light.
Do this for all four coils/plugs and see if one light appears dimmer or inconsistent with spark timing (or simply put, one doesn't look like the others).
Here is what one looks like:
Last edited by Jon316G; 10-08-2009 at 08:34 AM.
#17
Registered User
Join Date: Apr 2009
Location: michigan
Posts: 239
Likes: 0
Received 0 Likes
on
0 Posts
I too am having rough idle issues. I just replaced the coils/wires/plugs which helped it run smooth while driving, but you can feel the roughness in the seat, and obviously a lot through the shift ****.
Quite a few people seem to suggest cleaning the engine with the mazda solvent/seafoam/water could remedy this. Although in my case, I'm also suspect of the motor mounts - just haven't checked those yet.
Quite a few people seem to suggest cleaning the engine with the mazda solvent/seafoam/water could remedy this. Although in my case, I'm also suspect of the motor mounts - just haven't checked those yet.
Thread
Thread Starter
Forum
Replies
Last Post
Shankapotamus3
Series I Trouble Shooting
28
03-14-2021 03:53 PM
Danield97
Series I Trouble Shooting
1
09-30-2015 05:59 PM