Battery went dead, so I changed it out, now after the car warms up, and only after it warms up, I get a hesitation with a slight throttle tip in, like from a light or stop sign. Anyone experience this before, no check engine light, and just passed emissions no problem.

 

Some of the ECU parameters are reset when battery is disconnected for a while and probably just needs to relearn your driving habits which should help everything smooth out in a few days of normal driving

 

I have the exact same issue right now.

I disconnected my battery to change the HID headlights and upon driving I noticed the hesitation in my car from a dead stop.

Since I had never seen this before I disconnected the battery I would assume as much.

I did this 1 day ago and it still has the hesitation so hopefully it returns to normal in a day or so.

_Michael

 

After 200 miles of driving this issue never got any better.

I went to the dealership and had them flash my ECU under TSB # ITB11-018.

Took about an hour and a few laps for the tech to get it right but it fixed my issue.

No dirty throttle bodies, no dorty fuel or MAF sensor, purely electrical.

I would recommend reaching out to your dealer and have them do the same.

$60 bucks for them to flash it, problem resolved!

_Michael

 

Thanks MJ916, after a couple hundred miles, mine isn't any better, reading the tsb info, sounds exactly like my problem, sucks that a battery disconnect can cause such a problem.

 

So as crazy as it sounds, I disconnected the negative cable, held it to the positive cable to discharge any capacitors in the engine ecu, held it for 20 seconds, reattached negative cable and let the engine running to operating temp, then drove it 30 miles or so of city and highway roads and it never once acted up, before I did this, it would've acted up with in 10 minutes, so I consider this fixed!

 

Sounds fixed to me.

Mine was only doing it once the car warmed up so after about 20 minutes the hesitation would appear.

It is all electrical IMO so maybe whatever you did reset it to the right spot.

Nicely done!

_Michael

 

Glad you got it finally.

If it were my car though, I don't think I would have shorted the leads to discharge the residual charges for fear of damaging something sensitive by just arcing it. Instead, I would have either used some kind of a resistor to bridge the cables, or just pumped the brakes, turned on unswitched power circuits, etc. to provide some resistance in the 'discharge' circuit while discharging.

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