Hey guys. Ive got an 04 Non-S with the manual trans and 108K on the clock. Im having an issue with stuttering under acceleration below 2K rpms. This occurs in most gears but i can prevent it by babying the throttle until i reach 2k or keep my shift points around 2k rpms. Any ideas? Thanks in advance!

 

I'll be watching this thread.

I've recently been getting more and more annoyed with the throttle lag on my 03 R50; it's like there's a dead spot in the pedal. I can't even seem to get past it by revving the p!ss out of it before releasing the clutch.

Is this what you're referring to?

 

Its not so much a lag as a shutter/stuttering. It's almost like its going to stall like its starved for fuel for a second and then it powers through after 2K rpms.. but if I baby the throttle, it never appears.

 

Got it. Sounds like we have two different issues.

Mine feels like it the throttle control forgets for a second what its job is and suddenly snaps to. Yours reminds me of the days of driving old carburetored cars with fuel supply or choke issues.

Hopefully someone will be along who can can help you. Good luck!

 

Have you done a tune up? plugs and wires? Fuel filter made need to e changed. They are not lifetime filter like MINI says.

 

I second checking the plug wires. I've had two cars in the past that shuddered under load at low rpms. Both times, new wires fixed it. The insulation degrades over time and in the dark while spraying water on the motor, you could see the sparks jumping between wires as you revved it.

 

Have you looked at your crank pulley?

 

I have not looked at any of these. I'll check the plug wires tonight, but what do I look for in a faulty fuel filter? and what will I be looking for on the crank pulley?
THANKS A TON GUYS!

 

I have the same issue. I replaced my crank pulley a month ago, and it's been happening for about two weeks now. I thought it may be the belt slipping, but today it was so bad at 1500 rpm in 3rd going up a hill that It made the car jerk and almost stall.

My car is an 05' S

 

Here I just posted this to another thread.

"Heads up on the fuel filter, I just replaced mine (and yeah it looked terrible) but try not to mess up the fuel sending unit. Once I replaced the fuel filter, I must of broken the fuel sending unit that the fuel filter is attached to because it was not "sending" gas up to the engine. Also be careful dealing with the fuel, the stuff is nasty!"

If you have never changed the fuel filter it's a great idea. It will look very dirty and the fuel inside of the filter will be dirty too.

 

I also just checked out my ignition wires with the water spray test, and they were sparking like crazy. Hopefully that's all I'll need to do.

 

Good news! after installing a new set of ignition wires, the problem has gone away!

The old wires were getting so bad that I could barely accelerate without it stuttering and misfiring. Now it's like new.

Old wires were dried out and the insulation was bad, so it was arcing from the wires under heavy load, so it would cause misfires.

So change your wires!

 

One suggestion....
If the wires are that bad....
You might want to do some basic MX that has likely been overlooked....
Sparkplugs...
Coolant flush ( most often forgotten item on a mini IMO)..
Brake fluid flush....
Any of the above might cost you big $$ if skipped too long!!

 

Yeah, my wires were damaged when my car overheated as a result of my crank pulley failing about 2 months ago. That only accelerated the wear.

 

Excellent. I was hoping that would clear it up. I've had that happen to me on two cars in the past (Mitsubishi Eclipse and Audi A4) and both were at around 60K-80K miles. I got in the habit of changing them with the timing belt since it was a 60K item too.

 

One way to check if your wires are bad is to at night, start the car, and while it is running, spray a little water over the wires and coil pack. If there are any electrical arcs, then you're cables are bad.

 

I've heard you could do that.