I tuned my car a week ago and a couple days after while i'm driving and everything is fine, the car would bog/stutter one time and throw a code which i could have swore was a 68 but then i looked at the list of codes and it can't be because there is no 68. so it is either 58 or 67. if it throws the code and i turn my car off and on, the code is gone but the car will eventually bog/stutter one time and throw the code again. i'm not a running a cat and have no secondary o2 sensor. it is just a straight pipe from my header back to the muffler. my primary o2 is on the header. i'm leaning towards #58 because i don't think #67 would cause my car to bog/stutter. where is the tdc sensor #2 located anyways? so which code do you think it is?

58 - TDC Sensor 2 (Top Dead Center) or 67 - Catalyst system Efficiency Below Threshold

please help, i'm afraid to drive my car because i'm paranoid that bad things will happen.

gsr motor:
usdm itr pistons
itr cams
hytech knockoff header
skunk2 intake manifold
70mm bbk tb
jdm itr 3'' intake
arp headstuds
made 184whp and 130wtq sae corrected tuned on crome

 

Do you have to let the car cool down before restarting it, or just off and on?

 

off and on again and the cel is gone and it runs fine but it will eventually happen again.

 

bump