Jerking

Tiny
NITABOOSKIE
  • MEMBER
  • 2005 CHEVROLET IMPALA
  • 6 CYL
  • AUTOMATIC
  • 180,000 MILES
When I'm stopped at a light. And I accelerate, the car jerks
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Thursday, December 24th, 2015 AT 9:16 PM

38 Replies

Tiny
WRENCHTECH
  • EXPERT
Have the computer scanned for any codes and post the numbers here.

Also read the guides below on misfires and common causes, it my help you figure it out

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

https://www.2carpros.com/articles/engine-surges
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Friday, December 25th, 2015 AT 4:37 AM
Tiny
STANG06
  • MEMBER
  • 2005 CHEVROLET IMPALA
Shakes or Wobbles problem
2005 Chevy Impala 6 cyl Front Wheel Drive Automatic

my 05 chey impala has a misfire and I have checked all spark plugs nd cables also did compression test nd it all checked out good. All coil packs are good and working. I have not checked injectors but when I disconnect the cables to spark plugs it cuts off a bit so woukld that mean that they are working. Also wanted to know if it would have a miss if the fuell pressure regulator was faulty nd injecting gas into the intake through the vaccume hose?
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Tuesday, October 23rd, 2018 AT 6:31 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
Engine running rough or misfiring can be cause by the following:

1. Defective spark plug
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Idle air control valve.
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Tuesday, October 23rd, 2018 AT 6:31 PM (Merged)
Tiny
THEBOSS78229
  • MEMBER
  • 2005 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 100,558 MILES
I have change my spark plugs and wires, the fuel filter too. My car is still miss firing, what do I do and can I fix it my self?


http://www.2carpros.com/forum/automotive_pictures/419342_IMAGE_005_1.jpg

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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
DANAUTHIER
  • EXPERT
Is your check engine light on? Have you had the computer scanned? If so what are the codes? If you haven't had it scanned most major auto parts stores (autozone, advance, etc) will scan it for you free of charge.

There are many Things that can cause a miss fire, it could be fuel related, ignition related.

Please post a little more info and we will do our best to help you.

Thank you and I look forward to helping you.

Dan
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
THEBOSS78229
  • MEMBER
I have had it put on auto zone machine the code was 300 which is random miss fire
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
DANAUTHIER
  • EXPERT
The p0300 is helpful, if it was a specific cyliner or cylinders miss firing the codes would indicate which ones (p0301 is cyliner one and so on) This indicates all cylinders are miss firing. You have elliminated plugs & wires (used correct plugs, gapped them properly, made sure connections were clean, wires seated properly and replaced your fuel filter)

Have you checked fuel pressure? The fuel pressure, with the key on engine off your pressure should be between 52 - 59 psi. Low fuel pressure would cause your symptoms.

Do you have an aftermarket alarm system or remote start system on your vehciel? There is a GM Technical Service Bulletin (#02-06-05-400B) for your car about aftermarket alarm systems causing a missfire and damage to the catalitic converter.

Hope this helps, let me know.

Dan
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
THEBOSS78229
  • MEMBER
I do have an alarm system on it. Ok the check engine light went away, now all it does is fall dead on me. Could that be the mass air sensor or something like that?
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
DANAUTHIER
  • EXPERT
There is the GM Technical Service Bulletin about aftermarket alarm systems. I only have TSB's available to me in a. Pfd (adobe reader) format and have not been able to successfully post them on here. Send me a private message with your e-mail address and I will send you all the information I have.

As for the mass air flow sensor, with only a P0300 code it is not a "usual suspect." A faulty mass air flow sensor will normally give a code for the mass air flow sensor, a code for running rich/lean or a code for poor converter efficancy. You can check the screen at the opening to the mass air flow sensor (remove the fresh air intake from the mass air flow sensor and there will be what looks like a window screen covering the intake part of the sensor), if it is dirty you could carefully remove any dibris with a shop vac and clean the screen by spraying it with a "fuel injection safe" choke and carb cleaner. Also be sure to check and change your air filter regularly.

Do you have the ability to check your fuel pressure?
This is a very important to any drivability diagnosis. As I posted earlier it should be between 52 to 59 psi with the key on, engine off.

For information purposes, what part of the country do you live in. Most people do not factor this into the equasion, but different regions have different fuel mixture. If you live in the midwest where E85 fuel is prevelant and your vehicle is not flex fuel rated you should not use E85 fuel, the high alcohol concentration can give you drivability problems like you describe, also long crank time and no start situations. Fuels in the N.E. (Where I am) have a large concentration of sulfer that can cause drivabilty problems and problems with the fuel level sensor.

Just a few more ideas. Send me that message with your e-mail and I will get you some more info.

Thank you,

Dan
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
EMP524
  • MEMBER
  • 2005 CHEVROLET IMPALA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 113,000 MILES
The car was bought it with close to 113K. After drive for awhile. This happens. The problem goes away when the car is completely stopped at least 5 min. Replaced air filter, spark plug. Changed the oil, Transmission Flush is also done. Break and Rotor replaced for all wheels. Car runs very smoothly after 35 mph. It happens at the stop sign when the speed is 0.
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
MERLIN2021
  • EXPERT
I need clarification? Is it a rough idle problem? Does it hot or cold engine?
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
THEBOSS78229
  • MEMBER
I had them put the machine on it, and it was miss firing from 5 and 6 cyc. They said it might be the alarm that I had put on it about a month ago. The alarm is autopage.
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
EMP524
  • MEMBER
Thank you for responding so soon. I think it happens when it is hot. When I start driving it it drives and shift fine. But when the car is stopped and I accelerate more to go with traffic flow, it jerks in 1st (10 pmh), 2nd, 3rd gear. Car shifts normanl when I turn the car off and restart after 5 min. It happens when I am driving in town stopping going. No engine service light is on, but OEM reads the code of P0455. Any input is very appreciated:-)
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
DANAUTHIER
  • EXPERT
According to the TSB an aftermarket alarm/security/remote start system may draw power away from the ignition system causing a missfire.

Any missfire left untreated will allow raw fuel into the catalitic converter and damage the "honeycomb" filter in the converter. What happens is the raw fuel burns once it hits the high temps of the converter, which melts the filter causing it to clog.

I would recommend disconnecting the system and see if your drivability concerns dimminish.

Just a thought, let me know.

Thanks.

Dan
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
MERLIN2021
  • EXPERT
P0455= evap system gross leak, usually it's a gas cap that sets this code, but it can also be an emmissions leak in the canister or purge. Check your cas cap first, you may need a new one.
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
THEBOSS78229
  • MEMBER
It was my fuel injection regulator.
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
DANAUTHIER
  • EXPERT
Thank you. I just looked back though my posts and realized it didn't mention that, I am sorry. I ususally post that with the fuel pressure spec's and saw I didn't do that with yours.

Glad you have it fixed.

Thank you,

Dan
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
1RAYMONDAGOLDBERG
  • MEMBER
  • 2005 CHEVROLET IMPALA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 71 MILES
I have a 2005 3.4lr impala with a cyl 4 misfire I have rep all plugs wires fuel filter air filter pcv valve and the #4ing coil im still having the same code what should I look at next
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
Check compression and fuel injector on #4 cylinder.
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)
Tiny
CEHAYNES
  • MEMBER
  • 2005 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 170,000 MILES
My 2005 chevy impala was misting really bad, the motor was shaking and it wasn't picking up any speed. I took it to autozone to get it scanned. They told me that it read several misfire, but couldn't identify where the problem was coming from directly. On my way home it cut off several time and then stopped and wouldn't crank anymore. Can you tell me want the problem is?
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Tuesday, October 23rd, 2018 AT 6:32 PM (Merged)

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