I've got an 07 impala LS 3.5L V6. Car has a rough idle.... RPM's drops down to 550 to 600rpm once it reaches operating temp and it has been driving in stop and go traffic like when commuting to work.

Ok after living with that issue for 2 months finally got the problem solved. It was 2 items that were compromised. 1st being my power steering pump was in the beginning phase of seizing and failing. The pump began to create a rotational drag on the serpentine belt due to the resistance because the pump was seizing. That brought down the idle. 2nd was the bottom motor mount was completely shot I'm talking about there was no rubber what so ever. Replaced the serpentine belt, power steering pump and the motor mount and the car drives really smooth and quite. Car idles at 700rpm.

Ive been having this same problem with my 08 impala when im on the hwy it only gets me up to about 60 and i have to keep accelerating to get anything higher

Is it the battery?

It wasn't the battery, believe it or not I wrote that problem with that car about a year ago and solved it if you look and read out on my 2nd response. Fortunately, I am now the proud new owner of a new 2015 impala.

How did you determine it was your steering pump

I determined that by 2 reasons. Power steering was getting a whining like noise much like it does when the fluid level is low but that wasn't the case the pulley was actually in the beginning phase of seizing up creating the whining noise and 2nd the bottom motor mount was shot completely deterioted so the motor was actually moving in the engine bay even at idle. Replaced both components and problem solved.

CAN YO TELL ME JUST BOUT HOW MUCH DID IT COST TO GET THAT FIXED CAUSE I AM HAVING THE SAME PROBLEM WITH MY '07 IMPALA AT FIRST WE THOUGHT IT NEEDED A TUNE UP SO WE GOT THAT AND GOT THE SPARK PLUGS CHANGED AND EVERYTHING, THEN THEY SAID IT WAS THE FUEL INJECTORS SO WE GOT THAT FIXED AND IT WAS STILL SPUTTERING AND JERKING THEN THEY SAID THE VACUUM HOSE HAD A HOLE IN IT AT THIS POINT I HAVE BEEN FRUSTRATED WITH THIS CAR SO I GOT THAT CHECKED AND THEY SAID IT WAS THE FUEL INJECTORS AGAIN BUT I KNEW IT WASN'T BECAUSE THE FUEL INJECTORS ARE BRAND NEW WHAT COULD IT BE HELP!!!!!!!!!

my 2011 impala 3.5 just started running rough at an idle 130 000 on it reading above talked about power steering noise and yes it is noisy so im going to get that looked at first i noticed it was idling low around 550 rmp but engine light was not on now engine light came on and its idling even rougher taking it in get power steering pump look at makes sense ill let everyone know how i made out

Cleaning out old files, I just found a letter I had received, and unfortunately had not opened when I first bought my 2008 Impala. At the time I was being inundated with mail with offers and such. In this mail it said that the impala may begin to run rough and that if this occurs I could take the car in for free at or before 100K miles or 10 years whichever came first. Unfortunately, My car has 102K miles and I bought it in September 2007. Well guess what? Winter 2017-2018, my impala starts running rough at idle. It is worse when first started up and improves on highway. I cannot vouch for the validity of this letter; I just wish I had opened the darn thing.

I found the rough idle on this impalas !!! The ac if you don’t understand runs even with the ac off .if you uses the front Defog vents the ac comes on , so I was running with the ac on and windows open all the time .

2001chevy impala after I drive for an hour when I have to slow down my car has a miss but it runs good if I don't have to slow down what could it be

hey guys my name is aaron sowards earily i coundn't find how to get back on the site. ok iam going freaking crazy trying to figure this out...i have a 2006 chevy impala 3.5, when you start the car it dont miss only when your driving ir down the road then it will only miss for a few sencounds the stop long story short i looked up variable valve timing solenoid and a picture poped up, when i goggled it a guy came on explain bout variable valve solenoid but he referred to it as a variable valve oil control valve i cant find it on the car the picture that pops up lookes nothing like the one he had in his hand testing it i do know how to rest it if i could find it my question is, is it just like the ones on the toyota's cause the one he had in the video was off toyota..does the impala's 3.5 do they have the same vvt that ever other car has ??i also heard that it is posible that it cound be the coil box like i said it dont hardly ever miss, and it is leaking oil where the belt and all your pullies are its coming from that area done replaced oil filter housing gasket, put front crank shaft seal in it any ideas this site helped me fix my kobalt....im pretty sure the impala is a simple fix something miner hopefully i dont have the money o take it to a shop the check engine light is not on...it came on a couple flashed a couple times while i was driving down the road the went back never came back on is seems like when it does do it its when the motor has warmed up to....sorry to kind of jumped from one thing ti another but the picture of the vvt pops up for the 3.5 implala over buy the pullies a belt septerene belt..and has 3 star screws to it..someone elese said it was variable valve timing control valve..please and thank you can someone send a picture of where its at on the car...PLEASE AND THANK YOU

Aaron, try pulling your spark plugs out and look at them to see if any of spark plugs are drenched in oil. The problem your car is exhibiting sounds like a plug is fowling. If you come across a plug that has fowled and has oil residue then its time to change your spark plug tube seals and/or valve cover gaskets. The fowling plug may not trip the engine light because its still firing unless you drive the car hard enough for the computer to recognize a miss fire. Yes your 3.5L V6 is a variable valve system but i doubt the module for any of the VVT is off. That car is prone to having vacuum leaks as well, be sure to replace your lines if you see a weak idle or it wants to shutoff at a traffic light. Best of luck. Can't believe I answered this I had this car about 6 cars ago lol

thanks you very much chris i got in contact with a dealer ship they normally dont share info but this guy did and he said bout the same thing he thinks it could be a miss fire coile pack or spark plug i done replaced valve cover gasket, oil filter houseing gasket ..i dont know what your spark plug tube seals are? i have the spark plugs.just haven't changed them yet, and my oil leak is coming from the same side were the vvt is and the serves man said good chance its oil pan gasket i didn't relize the oil pan came up so far on the engine and he said they would make a mess to, its not coming from my header gasket its in the corner but loookes like its coming bout mid way down if you have the passegering side wheel off and look up at the motor lookes like its coming from above the cranksheft seal but behind crank shaft seal but higher up and its coming towared the back od the moror kinda like i said lookes like its coming around the area your tenstioner realize ..thank you ver much iam gonna see if the spark pugs take car of the problem..

i changed 3 of the plugs, something came up and i never finish the other 3 plugs but iam going to tomm morning with that said after just changing the 3 plugs the car started missing plus the engine light came on this time and stayed on befor it came on it flashed first the traction light control light came on and said service traction control ?? can any one help me with this, you think when i put the othere 3 plugs in it will solve the problem ?? thank you and have a good day

ok i changed ll 6 plugs and car still doing the same thing matter fact it got worse do you think it could be the coil pack....

@Guru6zzdk im having the same problem now im going to try to change the variable timing solenoid ive changed the camshaft sensor new computer and new engine wire harness still getting hard start and when it finally starts very bad misfire and rpm stays at 0

@Bryant313 Did the VVT solenoid replacement help?