cars not running right maybe you can help

[dgoody88]

ok what i am experiencing is on accelerating and holding at at any mph my car is kinda cutting out. say im bholding myy car at a set mph and rpm it will slow down and speed up. 1500 rpm down to 1000 give or take. i never really noticed it til i put my aftermarket muffler on and i can hear it and feel it slow down and speed up. i dont know if i need new plugs and wires or what. maybe someone on her can shed some light on this for me

[kevin7898]

What year, milage and other pm work have you done to it?

[dgoody88]

2010 with 42000 miles other than the muffler its stock

[kevin7898]

Shes due for a plug change, they are pretty cheap, id recommend doing that, i had my plugs and wires done in less than a half hour. Mine did kind of the same thing, after holding the same speed for a while id go to accelerate and i could feel it hold back for a sec. Plug change fixed it,

[dgoody88]

thats easy enough

[Thymeclock]

Shes due for a plug change, they are pretty cheap, id recommend doing that, i had my plugs and wires done in less than a half hour. Mine did kind of the same thing, after holding the same speed for a while id go to accelerate and i could feel it hold back for a sec. Plug change fixed it,

Check the air filter, and maybe the fuel filter, too. Hesitation can be caused by several things.

[kevin7898]

Dont know about the 2010s but my 05 has a non serviceable fuel filter, aka replace fuel pump.

[Aveo5_boy]

A cleaning of the throttle body will also help.

[avguy]

... i never really noticed it til i put my aftermarket muffler on and i can hear it and feel it slow down and speed up. ...

Whenever I get a brand new problem (any, not just cars), right after I did something else, then I'm going to believe that's the cause of the new problem until proven otherwise. Now in this case, maybe it's not the new muffler itself causing the problem. Perhaps something like a vacuum/air line that didn't get reconnected tight, or something getting inadvertently hit and knocked loose. Might be worth checking everything in the area where you did the work.

[2010AveoLT]

Shes due for a plug change, they are pretty cheap, id recommend doing that, i had my plugs and wires done in less than a half hour. Mine did kind of the same thing, after holding the same speed for a while id go to accelerate and i could feel it hold back for a sec. Plug change fixed it,

not only that, there is Recall 11290; which is the Degraded Spark Plug Boot recall. not only do they replace the Spark Plug Boots on the Coil Pack, they install new Spark Plugs with a narrower Gap. so in essence, you get a FREE Tuneup with this recall!