Hi I would like some expertise from you "dodge" guys..

Im working on a 2007 grand caravan 3.3 (not flex fuel) 20 000 miles on it

The car came in with an missfire/hesitation...at 40mph when I hold it and press so lightly on the gaz pedal keeping the rpm at 1500 the car missfires but barely....at any other speed or in acceleration the car runs smooth....

The owner of the car came n brought me 6 plugs and an oem wire set that i installed properly....(wires were making lil blue sparks with the cyl head)

I scanned it....no codes nothing....looked at the data everything looks normal...and i did a missfire counter with the scanner with a 15 mins test drive....nothing zero missfires no pending.....

Any knows problems with those cars? defect coil pack??
Any good hints to give me?

Im a german car specialist....worked on those for so long,iI dont know the common problems on American cars....

 

Ck for a knock sensor on the starter side of the block. Unplug it, will not set any codes. Also ck the neg ground cable at the battery and injector ground too. Have the dealer run the vin and ck for TSB's or flash up dates.

 

No TSB already looked for those....

 

Grounds are clean and good......

 

What is you barometric reading?