Originally Posted by steve99 (Post 2193281)

do you have standard intake, aftermarket intakes upset maf scaling and ecu cannot compensate accuratly

can you log your tune ?

log fuel trims STFT LTFT
AFR
Commanded AFR
load
rpm
knock correction
FLKC
IAM


hesitation sounds like afr is incorrect or high fuel trims or you getting knock causing ECU to pull timing causing hesitation.

Originally Posted by Albaro08 (Post 2193301)

No mods at all all stock got into a accident they put everything together nicely got that like after I drove off the shop took it back no leaks and it hesitates just a tad 3500 to 4200 Rpm I'm putting premium 93 in it all happend after I got it fixed I reset the battery after maybe 20 miles the engine and code comes back on and I get the air to fuel ratio unbalance Sucks bro

Originally Posted by steve99 (Post 2193326)

Well their is something wrong, maybe an 02 sensor is damaged or hairline crack in exhaust manifold or a leak like damaged hose in intake, but on stock car you should not get those codes.

Take it back or get dealer to check it, the accident repair should cover costs under insurance.

Originally Posted by Albaro08 (Post 2193146)

So your saying it will fix on its own?? Becuase this fucking is driving me nuts especially when I'm in the 4000rpm range the car hesitates a tad

Originally Posted by V_86 (Post 2193464)

Depends, in this situation if you are having CEL codes, probably not. But in normal circumstances, if you experience hesitation (after mods, changing battery, ect) the ECU will right itself after ~50 miles (that is, learn your driving style).

Originally Posted by steve99 (Post 2043546)

P2096-(normal code I get from the header)
You should not get that code after installing header unless you have a leak near o2 sensor / intake leak or damaged 02 sensor.

Code you get for catless header is P0402 (cat efficiency)

Those other two code you had point to intake/exhaust leak or problems with post cat 02 sensor.

If the second 02 sensor is crook or disconnected it will generally cause cruise control to be inoperative but im not sure if it triggers traction light.

Check the plugs on the front/rear 02 sensors are seated correctly they are near alternator at front of motor. They are grey and black coded and the plug and socket colors should match.

Originally Posted by Albaro08 (Post 2200856)

Did you get your issue fixed I'm having the same issue but just the air to fuel ratio unbalance and no cruise control

Originally Posted by steve99 (Post 2201510)

I did not have any problem ;) was just helping the other guy

If you getting air fuel imbalance codes check for intake or exhaust leaks or leaks at O2 sensor dirty maf sensors or damaged O2 or maf sensors

Originally Posted by Albaro08 (Post 2201517)

If checked for leaks none at all I use choke cleaner and won't see a Flux in the rpms well roughing out. But I'm not sure if that sensor would be messed up I also hesitate at 3500 to 4200 rpms

Originally Posted by steve99 (Post 2201604)

do you have stock intake ?

if you have aftermaket intake, most will require maf rescale to avoid hesitation and sometimes cel codes due rich/lean conditions.

Originally Posted by Albaro08 (Post 2201606)

I'm stock everything this all started after the car was at the body shop and that one code popped up I reset but comes back on after 30 miles or so

Originally Posted by steve99 (Post 2201635)

ok, you will have to keep looking

Originally Posted by Albaro08 (Post 2201637)

What's the best way to see if it's a vacum leak and then go on from there it's driving nuts becuase my shifts get ugly when at 4k rpm