hesitant acceleration

[masskedman807]

My car seems to have a small hesitations up to about 35 -40 mph,notice it more when i stomp on it like its missing,now i do have a emission code im taking to dealer to clear up but this seeems like plugs which are opnly 3000 old or injectors, heck i dont know... thats why im asking. Anyone have some idea?
Massked

[DaveW68]

I have feeling that once you get the code issue fixed, your hesitation will be fixed. BTW, when you replaced the spark plugs, did you go with the original Mopar brand or an after market plug? FWIW, you should always use the original mfr recommended parts, not after market parts like Bosch or whatever. If you went with after market plugs, that could be the source of your hesitation as many of them don't provide the proper spark needed to run our engines efficiently.

[masskedman807]

Thanks for the input Dave,plugs were done by dealer,i dont know much about engines but guessing a bad o2 sensor could give wrong mix??

[DaveW68]

Yes, a bad sensor can cause minor hesitation issues. Did the problem start right after the plugs were changed? If so, it's possible the tech didn't gap the plugs correctly. If it's a recent phenomenon that started when your car threw the code, I would think that the replacement of the sensor should solve it.

[masskedman807]

Bought car at 28,000,it had plugs changed at 26,000,it did seem a little before but now its more pronounced,i use top gas no crap, and the proper below limit of ethanol,i guess its very possible plugs were not done right and possibly fouling out?

[Nele22]

Sounds like the same problem I was having along with the rough idle. My 300 is still sitting at the dealer two weeks later waiting on a fuel pump that is back ordered till November.

[masskedman807]

Did they determine the fuel pump the cause for the idle and hesitation?And did you also have that code i have?

[joey]

You might try asking the dealer to flash your ECM and TCM.

I also have a 2005 car. Mine was built in August 2004 and my original versions were
ECM 04896415AC
TCM 04692390AC

After a flash in December 2006 my versions are now
ECM 04896415AK
TCM 04692390AG

I never noticed any difference after the flash, but some folks do.
But my dealer immediately flashed my car when I complained of engining bogging.