1st Gen R53 Cooper S 2003 MCS - On throttle delay time...

My 2009 JCW has no throttle delay at all.

My JCW is very responsive with instant throttle action so I really can't help you except to advise you to see your dealer.

Do you still have a delay with the sport mode turned on?

If you find the problem please post it for other Mini owner that may have the problem. I'm sure it is not a very common problem due to no complaints.

 

Gen1 cars CAN have a bit of delay (disregard gen2 info..different motor, turbo, and computer).
Just a bit more info...decribe the lag...
Many folks decribe things differently, and a delay could be normal or abnormal..
is it a delay in power...below 3000 rpm or so....a delay in tyrottle response at lower rpms, fine at higer, etc.
The drive by wire system on a mini DOES have a bit more lag than most like, but there are ways around this....custom tunes can adjust this, as can a sprint booster, but lag could be due to sensor issues, or stuck/sticky bupass valve....so be very descriptive.
If you have a local club, a member might let you barrow a sprintbooster for a short hop...if this is enough, great, but as these cars age a bit, i am inclined to tell folks too look a bit deeper before possibly masking an issue.

 

What i would do is be 100% all normal mantaince items are current...
Check the plugs, make sure the belt is recent, and check the plugs on the ignition coil (many get heavy corrosion due to oem desgin).
Next, i might make sure the fuel is good (high test only, switch supplies for a tank), and imo, do a seafoam treatment to clean the sensors...many folks do, some don't...do it wrong, no change, or even dammage, but if done right, might help. Next, i would look at the bypass valve...the springs fail, or they get sticky...you can zip tie it shut as a tempory measure, and drive it a bit...
Many cars around 2005 got multiple software upgrades to try to fix a yo-yo issue..the transition between bypass open, and then as it closed, and transtioned to WOT, some cars found one version of this software worked fine, others tried many....but the yoyo can feel laggy to some folks...
The mini does lack a bit of tq below 3000 rpm....i got a 17% reduction on the sc, (suits my driving style) and it brings the boost on at lower rpms...others that enjoy more rpms are better suited by 15% imo).
Once you get it squared away, the lag mostly dissapears...
My custom tune made the biggest differance, but as many have found, IF EVERYTHING IS FUNCTIONING WELL, a sprint booster, or clone, is an option.

 

I love my sprint booster. It takes all the delay out of the throttle (yes, there is some) and the car seems much quicker, but I have a 2nd Gen car, so disregard this.

Jim

 

The code as said in the other thread points at the crank damper or maybe a sensor...
Before spending the $$ to swap them out a bit of cleaning might help...
The crank damper is a realibility issue, longterm....mine is getting swapped out soon too...the rubber it is composed of is getting to the point it is flexing a bit when i inspect it compared to before.
Imo, after you do the damper, they to recreate the issue...if it happens, it might be worth looking at the airflow sensors...(and for leaks). If i remember right, there are 2, but even though they look the same, they are different p/n, and cannot be swapped.

 

The dsc on gen1 is inactive till it flashes...then it cuts engine output...

 

I'm going out on the limb here..


I'm guessing the crank pulley that is on it's way out is taking a little more to spool up at the lower RPM's, maybe even slipping some. Once the pulley is replaced the throttle lag will lessen.

Again, just a theory.

 

So you replaced the crank pulley?