Idles rough while stopped

[Blue hedgehog]

okay guys, gals, your little engine is a 1.4 or 1.8... when you have your defrost on it uses the A//C to help defrost your car.. Likewise if you have your A/C on when its hot out the A/C runs. This is putting a load on the engine at IDLE. As soon as you apply the accelerator the engine is able to overcome the strain of the A/C at idle and you no longer feel it. Try this again with your cars with NO A/C or DEFROST on and see if it still does it. Also at idle with none of these on, do turn them on and you will feel the load on the engine that I am speaking of. Good luck, this is normal for small engines. you don't notice it in v-8 engines as they have the power and inertia of the bigger engine and rotating mass to overcome this issue at idle.

Being a mechanic for 25 years I'm aware of this. My car does it with AC/defrost off. The only thing that will stop it is putting it in neutral. The autos on these cars are supposed to go into neutral automatically, but don't always. I know it doesn't because I can feel it go into neutral when I shift it in manually.

It may be the auto trans dis-engaging when you are stopped, it feels like lugging or surging sometimes when releasing the brake.

I get a surging when the car is slightly warmed up. Approximately 2 miles worth of driving on a cold start. Sometimes it does it while comming to a stop almost like severely warped rotors. Other times it will do it while I'm stopped. Usually it only does it 5-6 times before it runs normal again.

I know I read there's a technical service bullitin on the 1st gear clutch pack. Like I said I just need some time to get the car back to the dealership.

 

[Sonicnw]

Being a mechanic for 25 years I'm aware of this. My car does it with AC/defrost off. The only thing that will stop it is putting it in neutral. The autos on these cars are supposed to go into neutral automatically, but don't always. I know it doesn't because I can feel it go into neutral when I shift it in manually.




I get a surging when the car is slightly warmed up. Approximately 2 miles worth of driving on a cold start. Sometimes it does it while comming to a stop almost like severely warped rotors. Other times it will do it while I'm stopped. Usually it only does it 5-6 times before it runs normal again.

I know I read there's a technical service bullitin on the 1st gear clutch pack. Like I said I just need some time to get the car back to the dealership.

just for kicks, get some carb cleaning fluid and spray it around your platic intake manifold and see if you have a vacuum leak... just a thought. never been a fan of plastic against a hot engine.

 

[Ever Victorious]

I know I read there's a technical service bullitin on the 1st gear clutch pack. Like I said I just need some time to get the car back to the dealership.

Would that by any chance be PI0928?

I've had this happen to my Sonic once or twice. I'm going to schedule the dealership to investigate at the time of my first oil change. I get free service loaners, so not big deal for me to have it gone for a day or so while they look at it.

 

[Blue hedgehog]

Would that by any chance be PI0928?

I've had this happen to my Sonic once or twice. I'm going to schedule the dealership to investigate at the time of my first oil change. I get free service loaners, so not big deal for me to have it gone for a day or so while they look at it.

Yep, that's it. I didn't know the #. Thanks


Subject: Bump, Surge or Vibration at Idle in Drive at a Stop
Models: 2013 Buick Encore
2012-2013 Chevrolet Cruze, Sonic
Equipped with 1.4L Engine (RPOs LUJ, LUV) and 6T40 Automatic Transmission (RPO MH8)
Vehicles Built Prior to January 1, 2013
Condition/ConcernSome customers may comment on a bump feeling, a surge or an engine vibration while stopped at idle with the transmission in Drive and their foot on the service brake.
Note: This condition is only when stopped at idle with the transmission in Drive and foot on the service brake.

Recommendation/InstructionsThis condition may be caused by the transmission Neutral Idle feature.
Important: The Neutral Idle feature will only function when transmission fluid temperature is 37°C (99°F) or greater. Verify that the transmission fluid temperature is 37°C (99°F) or greater before diagnosing this condition.

When the concern occurs, move the transmission shift lever to the manual position.
Moving the transmission shift lever to the manual shift position will prevent the Neutral Idle feature from functioning.
If the concern is eliminated by moving the transmission shift lever to the manual position, it is caused by the Neutral Idle feature and variation in the 1-2-3-4 clutch fiber plates. The 1-2-3-4 clutch fiber plates should be replaced with the part number listed below. This is a kit that contains two clutch fiber plates.
If the concern is not eliminated by moving the transmission shift lever to the manual position, it has a different cause and further diagnosis is required.
Parts Information
Part Number Description Qty
24268545 Plate Kit, 1-2-3-4 Clutch 1

 

[Ever Victorious]

"Vehicles built prior to January 1, 2013"

Greaaat. I'm pretty sure mine was built after that, but is still exhibiting this condition. Hope I don't have a repeat of my Nissan Versa's BCM issue, which went something like this.

Dealer: "But your car isn't within the VIN range on the bulletin."
Me: "And yet it's experiencing the exact same symptoms. Not close, exact."
Dealer: "But your car isn't within the VIN range on the bulletin."
ad nauseum.

Thanks for the full text, though. Always helpful to have that.

 

[Blue hedgehog]

Mine was built 10/12 so I fall under it. When was yours built? The sticker is between the 2 doors on the drivers side.

The pic is upside down. This always happens when I use my phone.

 

[Ever Victorious]

That iPhone issue is common. We see it all the time on the Pop-up camper forum. Most reliable fix we've found is to download it to a PC, rotate it, rotate it back, and save it. The PC forces an orientation on the picture.

I'll have to go look at my pillar sticker at lunch. Car was purchased in December 2013. Chances of it having been manufactured a year or more before its purchase are slim to none.

 

[Blue hedgehog]

You never know. Anything is possible. When I worked at the Buick dealer a salesmen managed to find a customer a brand new impala ss 2 years after they stopped making them. I know an impala is a chevy. I have no idea how he got involved or how he sold it.

 

[Ever Victorious]

July 2013. *grumble*... well, I guess we'll see how it goes.

 

[ellman605]

What about the 1.8? I've got the 1.8 and auto and have the same exact issue...

Sent from my SM-N900P using Tapatalk

 

[Blue hedgehog]

What about the 1.8? I've got the 1.8 and auto and have the same exact issue...

Sent from my SM-N900P using Tapatalk

Surging or rough idle when stopped in gear? If its the rough idle, check your plug gaps. If they are ok I don't know.

It's common for the plug gaps to be off on both the 1.4 and 1.8 from the factory. Someone else will probably chime in if I'm wrong but I THINK the 1.4 is .028 and the 1.8 is .035

 

[Greasemonkey]

after reading through this whole thread, my car is a 2014 (I will look up the mfg date tomorrow) and, it surges A LOT stopped at a light. I thought it was just some stupid quirk it had. I will call the dealer in whitefish, MT tomorrow. hopefully the tsb has expanded to my mfg date. I have a 2000 Tacoma that had the lower balljoint separate on me. there is a RECALL for the 01-04 Tacoma for the same problem. being that mine was made before 01, the dealer insisted that there was nothing they could do for me besides replace the balljoints at full price. I felt dirty after I got off the phone with them... -shawn