Rough Idle
Thread Starter
Racer
Joined: Jun 2012
Posts: 339
Likes: 68
Rough Idle
Hello,
It may be just in my head but I feel like my 2012 GS is idling a bit rougher than usual. It could be just because it's gotten a bit colder but I did also run the fuel pretty low by accident recently. Didn't run out but was lower than I'd like.
Are there any issues with running an additive in case some dirty fuel went through? If so is there a recommended type?
Thanks!
It may be just in my head but I feel like my 2012 GS is idling a bit rougher than usual. It could be just because it's gotten a bit colder but I did also run the fuel pretty low by accident recently. Didn't run out but was lower than I'd like.
Are there any issues with running an additive in case some dirty fuel went through? If so is there a recommended type?
Thanks!
Le Mans Master
Joined: Oct 2017
Posts: 5,427
Likes: 2,309
From: Billings Montana. Out in the wild west
I use Sea Foam myself, http://seafoamsales.com it's good stuff. I run it in all my vehicles about twice a year. You want to add it before filling up with gas so it gets mixed in well with the gas. Also I avoid gas with ethanol with a passion, there's a lot of stations around here that sell ethanol free premium and that's all I'll put in my babies.
Last edited by madsonp; Nov 29, 2017 at 12:45 PM. Reason: added link
Safety Car
Joined: Oct 2015
Posts: 4,128
Likes: 616
From: St Louis Area IL
My GS did the same thing one day after revving the engine and screeching the tires a little bit in a parade. It ran a little rough, then a traction control error showed in the DIC. I pulled the codes with a reader and saw I had a misfire on cylinder #6. The plug wire fell off the plug from revving the motor. Plugged it back in and the idle smoothed out.
Check your plug wires.
Check your plug wires.
Team Owner
Joined: Mar 2014
Posts: 21,631
Likes: 1,144
From: Below the bottom of Berby Hollow, NYS
I use Sea Foam myself, http://seafoamsales.com it's good stuff. I run it in all my vehicles about twice a year. You want to add it before filling up with gas so it gets mixed in well with the gas. Also I avoid gas with ethanol with a passion, there's a lot of stations around here that sell ethanol free premium and that's all I'll put in my babies.
Le Mans Master
Joined: Oct 2014
Posts: 8,673
Likes: 2,728
From: Atlanta GA
Read on the forums that some plugs and the positive cable cable on the alternator being to close to the plug wire could induce RF into the ignition system causing a miss ....
took 2 minutes to loosen the cable and rotate it so it was position as far as I could get it from the plug wire
end result... no more miss verified with my TECH ll
hope this info might help you
Dave
Last edited by Dcasole; Nov 29, 2017 at 10:41 PM.
Team Owner
Joined: Dec 2003
Posts: 21,847
Likes: 140
From: When all is said and done... there is a hell of a lot more said than done. Riverside,Texas
St. Jude Donor '05 thru '26
I use Sea Foam myself, http://seafoamsales.com it's good stuff. I run it in all my vehicles about twice a year. You want to add it before filling up with gas so it gets mixed in well with the gas. Also I avoid gas with ethanol with a passion, there's a lot of stations around here that sell ethanol free premium and that's all I'll put in my babies.
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Le Mans Master
Joined: Oct 2014
Posts: 8,673
Likes: 2,728
From: Atlanta GA
Almost all the posts about random misfire are about people who changed from using OEM wires or plugs
I had replaced my wires and plugs with oem parts and still had the misfire , when I monitored these random misses on my TECH ll and saw that it was happening on every cylinder I knew it had to be more than a single plug wire , plug or injector
Moved the battery cable and the miss was gone .........got to love all the electronics in our cars lol
Dave
Team Owner
Joined: Mar 2014
Posts: 21,631
Likes: 1,144
From: Below the bottom of Berby Hollow, NYS
Glad to help
Almost all the posts about random misfire are about people who changed from using OEM wires or plugs
I had replaced my wires and plugs with oem parts and still had the misfire , when I monitored these random misses on my TECH ll and saw that it was happening on every cylinder I knew it had to be more than a single plug wire , plug or injector
Moved the battery cable and the miss was gone .........got to love all the electronics in our cars lol
Dave
Almost all the posts about random misfire are about people who changed from using OEM wires or plugs
I had replaced my wires and plugs with oem parts and still had the misfire , when I monitored these random misses on my TECH ll and saw that it was happening on every cylinder I knew it had to be more than a single plug wire , plug or injector
Moved the battery cable and the miss was gone .........got to love all the electronics in our cars lol
Dave