Lope when Cold, in Gear

[Krew]

Hi All,

2004.5 - check sig for meaningful mods.

I have an odd issue that I'm not finding much info on searching the net. Sometimes, when its cold out (say mid 30's and below) I get a lope when cold as soon as its put into gear.

Basically I'll start it up, let it idle for a few seconds ( long enough for insight gauges to come online) and then I'll put in in reverse and back out of the driveway.

It will idle smooth as butter in park/neutral, but as soon as I put it in reverse it will lope. It revs fine and only lopes at idle in gear for a few minutes before clearing up. Truck has lots of power and does not make any smoke at startup. I've JUST replaced the FCA and that didn't help.

There seems to be two trains of though on lope in the CR's... some say its normal with bigger injectors, other say not and all of the threads I've read are unfinished... like the conversation just ends without a resolution.

I'd like to get your thoughts.

Thanks in advance.

 

[cerberusiam]

There is myriad of things that can make a CR sound like it is loping, some are external in how well the injectors are balanced and the QC on the nozzles, others are internal programming the ECM does to aid warmup in certain conditions. Any and all can occur in neutral\park or show in gear depending on the trigger. If it only does when cold and clears up quickly it is just the nature of the beast.

 

[Krew]

There is myriad of things that can make a CR sound like it is loping, some are external in how well the injectors are balanced and the QC on the nozzles, others are internal programming the ECM does to aid warmup in certain conditions. Any and all can occur in neutral\park or show in gear depending on the trigger. If it only does when cold and clears up quickly it is just the nature of the beast.

Thanks, that's reassuring. Appreciate the response! It only started doing it this year after new ddp 90's and when the weather started getting cold.

 

[Dustin Ferguson]

Did it do it once the weather warmed up? I just put 200hp DDP injectors in my truck and it does the same thing?

 

[Dustin Ferguson]

Did it do it once the weather warmed up? I just put 200hp DDP injectors in my truck and it does the same thing?