Question about 2008 Chevrolet Cobalt

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My 2008 chevy cobalt sport has a cylinder 4 misfire i changed all the plugs and a cylinder sensor it shakes when its on and if i drive it dosnt wanna go over 40 could it be the coil how to tell

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  • 149 Answers

Switch the suspected coil with another cylinder and retest. Clear the codes and test drive, if the cyl. misfire code changes to the new location, it's the coil, if it doesn't, it could be a fuel injector problem, low compression problem, vacuum leak, etc

Posted on Dec 12, 2014

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Posted on Jan 02, 2017

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  • 217 Answers

SOURCE: 1998 Cavalier No Spark in cylinders 1 & 4

ignition mod. grounds,pcm or timing belt could all be it but, I would have to look at timing first.

Posted on Jan 17, 2009

  • 819 Answers

SOURCE: I have a 2002 TrailBlazer with the straight

did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
?

Posted on Feb 28, 2010

  • 137 Answers

SOURCE: i have a 2001 chevy

misfires can be caused by faulty ignition components, but they can also stem from other components. Such as faulty injectors, or improperly timed or unseated valves. Sounds like you have touched on all of your ignition suspects.
Are there any codes present other than P0304, P0305 and P0306? If so they should help guide you in the right direction. If not, You might want to make sure your valves are seating and if so, go ahead and swap an injector from a misfiring hole with a good one from a hole with no misfire. (like switch #2 and #4 injectors for example) if the misfire moves to cyl 2, you know the injector is at fault.

Posted on Oct 02, 2010

  • 691 Answers

SOURCE: 2000 toyota avalon v6 multiple random misfires.....and misfire number 4 cylinder

Sounds like HT Leads as you haven't mentioned them above? not being familiar with the car I would say distributer but by the sounds of it your leads go straight to the coils. Crank sensor might be playing up aswell.

Posted on Jan 08, 2012

motor1258
  • 6674 Answers

SOURCE: random misfire on 2004 chevy tahoe z71

Use some electrical spray cleaner or tuner cleaner and give mass air flow sensor a good cleaning. then try it. If that doesn't help, a fuel system pressure test may be smart to confirm proper pressure required is there. Low fuel pressure will cause multiple random misfire as well.

Posted on Feb 18, 2012

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97 chevy tahoe running rough update....


code P0303 is a misfire code for cylinder # 3, Possible spark plug, wire/coil or injector problem. P0141, bank1 sensor2, is the upstream oxygen sensor, this code may have been set by the misfire of Cyl #3, the lean condition is being cause by the misfire. Fix the misfire and clear the codes and P0141 should not return. If the vehicle is equipped with Coil over plug system try swapping the coil with any one of the others, test drive and if the misfire code changes to another P0300 code ( P0301, P0302, P0304 etc...) the coil has failed and will need to be replaced.

Jan 23, 2014 | 1997 Chevrolet Tahoe

1 Answer

My Nissan yesterday started idling terribly and when I was driving it was shaking and vibrating so bad it felt like I was driving with square tires.


I doubt the EVAP problem is causing the rough running. The knock sensor code means the knock sensor noted a severe vibration. The cylinder 4 code could mean the miss has become bad enough to trigger a code for one cylinder.
I would look at the injectors and for a vac leak. And the spark plugs can be firing in air but not inside the cylinders under pressure.

Sep 10, 2012 | Nissan Cars & Trucks

1 Answer

Firing order for 2008 chevy cobalt?


howdie why are you changing the injector the only reason for changing in injector is bad fuel or worn pump,it wood through a code for this misfire is change plug and wire that's all

Jul 25, 2012 | Chevrolet Cobalt Cars & Trucks

2 Answers

I have a 2008 dodge avenger se and my engine light is on and was flashing before. when it is in drive or park it turns off when i stop. i took it to auto zone and the told me that cylinder 3 and 4 misfire...


The best way to fault find in swap coil 1&2 with coil 3&4. If the fault doesn't change, it is possibly the plugs or something more sinister electrically.

Sep 18, 2017 | 2008 Dodge Avenger

1 Answer

Vehicle missing,shaking,engine light comes on


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The shaking tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
P0313 - Misfire detected with low fuel

Jun 23, 2011 | 2004 Ford F150

1 Answer

Howto change a key cylinder for a chevy cobalt


There is a TSB on this issues if your having ignition lock issues.
Service Information
2009 Chevrolet Cobalt | Cobalt, G5 (VIN A) Service Manual | View All Bulletins | Document ID: 2325129

#09-02-35-005: Ignition Key Difficult to Remove, Ignition Key Binds or Sticks in Cylinder (Replace Ignition Cylinder) - (Aug 10, 2009)

Subject: Ignition Key Difficult to Remove, Ignition Key Binds or Sticks in Cylinder (Replace Ignition Cylinder)

Models: 2008-2009 Cadillac CTS (Built Prior to VIN Breakpoint 90163371)

2005-2009 Chevrolet Cobalt (Built Prior to April 14, 2009)

2006-2009 Chevrolet HHR (Built Prior to April 14, 2009)

2007-2009 Chevrolet Equinox (Built Prior to July 2008)

2005-2006 Pontiac Pursuit (Canada Only)

2006-2009 Pontiac Solstice (Built Prior to April 14, 2009)

2007-2009 Pontiac G5 (Built Prior to April 14, 2009), Torrent (Built Prior to July 2008)

Attention: This bulletin only applies to vehicle equipped with automatic transmission.

Aug 05, 2010 | 2005 Chevrolet Cobalt

2 Answers

Car Shakes When Driving


I had the shaking problem too, had the #5 coil replaced and the shaking instantly stopped.

Apr 15, 2009 | 2000 Nissan Maxima

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