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Why is my Mini Cooper misfiring?
Common reasons for this to happen: Faulty spark plugs or wires. Faulty ignition coil. Broken piston rings.
What causes random misfiring?
A random misfire code usually means the air/fuel mixture is running lean. But the cause might be anything from a hard-to-find vacuum leak to dirty fuel injectors, low fuel pressure, a weak ignition coil, bad plug wires, or compression problems.
How do you fix a small misfire?
Inspect the spark plugs for signs of damage. Use a spark plug socket to remove the plug so you can get a good look at it. The damage you see will help you determine the cause of the misfire. If the spark plug is just old, replacing it may solve the problem. Make sure to replace and properly gap new spark plugs.
Can low coolant cause misfiring?
Coolant Problems Internal coolant leaks can foul a spark plug and cause a misfire. Unfortunately, it also means that drivers will run a vehicle with a coolant leak for several thousand miles while the plug becomes slowly fouled.
How often should you change spark plugs Mini Cooper?
every 30,000 miles
Your owner’s manual will likely recommend that your Mini’s spark plugs be replaced every 30,000 miles or so. That number is a bit low, so waiting even 50,000 miles should be fine if you check on their condition regularly.
What causes the misfiring on the Mini Motor?
The misfiring only happens in open loop mode. Once the car has warmed up and switched over, it runs perfectly. It seems that it’s running too rich, as I get a fair bit of gray smoke out of the exhaust as it’s stumbling.
What was the misfire code on my Mini Cooper?
It’s me again. 2008 MINI Cooper S w/ dealer-installed JCW package (chip tune, larger air intake, larger cat-back exhaust). I thought everything was fine after resetting my ECU last week, but had bad misfiring at idle again this morning which set the random misfire code.
What was the problem with the misfire plus misfire?
Random misfire plus misfire in 2 and 4. LTFT is back up to 0%. It was the high pressure fuel pump. After letting it sit overnight, the dealership was able to reproduce the issue and replaced the pump under the extended warranty. The car is driving like it did when I bought it two years ago.