Rough idle issues after muffler delete?
05-02-2011, 12:02 AM
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Rough idle issues after muffler delete? did the muffler delete about 1k miles ago and now my v is starting to idle very rough and seems to bog under 2k rpms. Only thing i could think is the loss of backpressure from hacking off the mufflers but i would have thought alot more people would have this issue. Anyone else experiencing this?
05-02-2011, 04:42 AM
#3
Go to Advance Auto Parts (if there's one nearby) and ask to borrow their OBD2 scanner. Find the misfire counter and reproduce the conditions that cause your engine to run rough.
If you had read my recent "newbie" threads, you would've already known that after gutting my mufflers, all was well--however, after installing headers and removing the cats, my engine has been running rough between 1000-1600 RPM (AND when demanding torque from the engine). Idle is normal. I pulled everything out and triple-checked it (including doing impedance tests on the spark plug wires). Everything checked out.
OBD2 indicates that I'm misfiring about 25% of the time during these events. Next steps for me are a different spark plug gap setting and a tune. I'm going to call ahead and let my tuner recommend something.
If you had read my recent "newbie" threads, you would've already known that after gutting my mufflers, all was well--however, after installing headers and removing the cats, my engine has been running rough between 1000-1600 RPM (AND when demanding torque from the engine). Idle is normal. I pulled everything out and triple-checked it (including doing impedance tests on the spark plug wires). Everything checked out.
OBD2 indicates that I'm misfiring about 25% of the time during these events. Next steps for me are a different spark plug gap setting and a tune. I'm going to call ahead and let my tuner recommend something.
05-02-2011, 10:25 AM
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its not throwing any codes. therefore obd isnt going to tell me anything. it might be the spark plugs. ive never changed them since ive owned the car for about 9mos
05-02-2011, 02:58 PM
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Took it to the dealer, they think its the motor mounts. Although i thought they had been changed before, they said they could be bad again. So they are changing those and gave me a 2010 cts loaded with 500 miles to drive in the meantime 
05-02-2011, 03:08 PM
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Go to Advance Auto Parts (if there's one nearby) and ask to borrow their OBD2 scanner. Find the misfire counter and reproduce the conditions that cause your engine to run rough.
If you had read my recent "newbie" threads, you would've already known that after gutting my mufflers, all was well--however, after installing headers and removing the cats, my engine has been running rough between 1000-1600 RPM (AND when demanding torque from the engine). Idle is normal. I pulled everything out and triple-checked it (including doing impedance tests on the spark plug wires). Everything checked out.
OBD2 indicates that I'm misfiring about 25% of the time during these events. Next steps for me are a different spark plug gap setting and a tune. I'm going to call ahead and let my tuner recommend something.
If you had read my recent "newbie" threads, you would've already known that after gutting my mufflers, all was well--however, after installing headers and removing the cats, my engine has been running rough between 1000-1600 RPM (AND when demanding torque from the engine). Idle is normal. I pulled everything out and triple-checked it (including doing impedance tests on the spark plug wires). Everything checked out.
OBD2 indicates that I'm misfiring about 25% of the time during these events. Next steps for me are a different spark plug gap setting and a tune. I'm going to call ahead and let my tuner recommend something.
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05-04-2011, 04:05 AM
#14
to be honest.... I love driving my car 100% more after driving it with the new sensor....... If you dont have a warranty its a 40$ part and from what ive heard easy to install. and my car at 34k had the sensor go bad. So im guessing if your having the same problems, why not go get it replaced. The shifting is so much smoother. If you have a warrant and your cruise control doesnt work. Go in and demand a new CPS
05-04-2011, 02:45 PM
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yeah i gotta go back soon anyways, my v has been eating oil like crazy lately. just put in a quart last week and now my check oil level light is on again. that and they found out it wasnt my motor mounts making it run like **** it was a bad plug SURPRISE SURPRISE lol i told them that from the beginning, but it still has a bit of a shake to it but i can deal with it.
