This is something I have been noticing lately. First, 43,000 miles with 15% pulley and colder plugs (new) are the only mods. Everything else stock. No codes have been registered. A few tanks of fuel injector cleaner have been run through. After the car is warm, at idle, I sometimes can feel a lope, like a big cam V-8. Tach is steady. Give a little gas, it goes away. There are no issues at speed or acceleration. Anyone have this similar experience or ideas?

 

Mine does it too. When I researched it at the time, it seemed that this is a Mini peculiarity and nobody knows what makes it happen. Like you said, a quick blip of the throttle and it goes away. Temporary fuel starvation? I don't know - it never throws any codes either. I'm not worried about it in my case.

 

Mine did it on occasion which prompted me to replace the fuel filter. Since doing so (15k miles ago), it has not happened again.

 

The fuel filter is a quick change, possible fuel flow issues through the older filters .

Fuel Filter Kit. Part number 16146757196


http://www.ecstuning.com/Search/SiteSearch/16146757196/





The ring can be removed with constantly tapping it out. Flat head screw driver works pretty good.

Here is your DIY thread for the fuel filter for Gen 1 MINIs.

Click here for a great how to thread.


This is next on my maintenance list anyway for my R52

 

When I rebuilt my car, every filter, fluid, belt, gasket and plug was replaced. Plug wires and coil pack are still original. The pins on the coil pack are nice and clean, even number 3.

 

Yes.....I have the same issue. It's a pretty common issue with the R53's. There a multiple threads about the same issue....not sure anyone has been able to find any kind of a fix.

Mine does it a few times a week.....but then might go for a month without doing it. I've got an ARF gauge on my car. I can tell when it's going to start to do it with the AFR reading start going from a normal 14.7-15.0....and starts drifting up to 16, then 17, then 18, and then the motor will start chugging/loping, and then the AFR's get up to around 19 and it sounds like the motor is going to die.......and then after a few seconds the AFR's start coming back down to normal, and the idle smooths out....and it's all back to normal again.

I've never gotten a check engine light, and it's never actually died. Even after a different tune, it still does the same thing. Not sure if it's just a bug in the OEM fuel/timing maps or what.....but it's annoying.

Another thing that fixes it is that as soon as it start to act like it's going to start loping, I just rev it up a little bit....and the problem is gone.

I put in a new fuel filter.....didn't help. I checked my fuel pressure....right where it's supposed to be. I put in new injectors and got a new tune, problem is still there. New plugs, new wires....problem is still there. Not sure if I've ever heard of anyone actually finding the root cause of this. Like I said...sometimes it will do it several times a week....sometimes it won't do it for months. Very strange.