rough idle after car wash?
10-26-2007, 04:59 PM
#1
Launching!
Thread Starter
iTrader: (3)
Join Date: Oct 2003
Location: Amarillo TX
Posts: 210
Likes: 0
Received 0 Likes
on
0 Posts
rough idle after car wash? After running my car through my local quick quack car wash the past few times, my idle becomes real rough. Its as if it messes up my A/F ratio or something. The car just putters and the rpms bounce around. This last time I decided to turn the engine off and the problem still occurs. I've been using this car wash for the last 4 years and they do an incredible job and I've had no problems. I switched from a K&N filter to a fram a couple of months ago is the only thing I can think of. Has anyone had any experience with this?
10-26-2007, 05:07 PM
#4
TECH Veteran
iTrader: (7)
Join Date: Jun 2006
Location: Bay Area California
Posts: 4,409
Likes: 0
Received 0 Likes
on
0 Posts
doesn't happen necessarily after a wash, but my car goes in and out of rough idling.....I dont why. it never throws a code or anything, the rough idle started up again last week after i put some sea foam in the gas tank.....
10-26-2007, 05:11 PM
#5
Launching!
Thread Starter
iTrader: (3)
Join Date: Oct 2003
Location: Amarillo TX
Posts: 210
Likes: 0
Received 0 Likes
on
0 Posts
They don't spray the bay. I don't see how I could be getting any water in the filter when the car is off. I should probably check to see if its damp.
Trending Topics
10-27-2007, 03:56 PM
#13
If you hook up a scantool when it happens you can probably see immediately which sensor it is that goes nuts, and then it should be easy to figure out why it's happening to that sensor. It could also be something like old crappy plug wires combined with some moisture getting into the engine bay...does it happen if you drive it in the rain?
Don't think that turning the car off when there's a LOT of water spraying on it will have much of an effect on the filter...there's not exactly some tremendous air velocity through the filter at idle while you're rolling through the car wash...only time it's gonna pull water in the filter is if the filter is submerged, or you're spraying water directly at it. Even then, a little bit of water going through a running engine wouldn't make it run like that...it'd just steam clean the pistons and chambers and make it run nicer.
Don't think that turning the car off when there's a LOT of water spraying on it will have much of an effect on the filter...there's not exactly some tremendous air velocity through the filter at idle while you're rolling through the car wash...only time it's gonna pull water in the filter is if the filter is submerged, or you're spraying water directly at it. Even then, a little bit of water going through a running engine wouldn't make it run like that...it'd just steam clean the pistons and chambers and make it run nicer.
10-27-2007, 05:57 PM
#14
Launching!
Thread Starter
iTrader: (3)
Join Date: Oct 2003
Location: Amarillo TX
Posts: 210
Likes: 0
Received 0 Likes
on
0 Posts
Ya it goes away after about 10 minutes and the last time it rained it happened too all within the last month. It had actually stopped raining and was just sprinkling but the roads were still nice and wet. Maybe water coming up from the road.
I unfortunately don't have a scan tool :/
Maybe I should just replace both front o2 sensors? They expensive?
I unfortunately don't have a scan tool :/
Maybe I should just replace both front o2 sensors? They expensive?
10-27-2007, 08:12 PM
#16
TECH Fanatic
iTrader: (31)
Join Date: Apr 2007
Location: Dover DE
Posts: 1,207
Likes: 0
Received 0 Likes
on
0 Posts
Before you change anything. Disconnect the battery and then disconnect both pugs on the PCM. I'm pretty sure you are going to find water in one or both of them.
This exact same thing happened to me a few weeks ago when I washed the car. Idled rough and missed real bad at lower RPM then would clear up at higher RPMs. Sometimes, after driving a few miles it would totally clear up. Somehow I got water int he PCM connectors while washing the car.
Re'
This exact same thing happened to me a few weeks ago when I washed the car. Idled rough and missed real bad at lower RPM then would clear up at higher RPMs. Sometimes, after driving a few miles it would totally clear up. Somehow I got water int he PCM connectors while washing the car.
Re'
