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I have a misfire in my 2009 mini s, but only in cylinders 1…

Customer Question
I have a misfire...

I have a misfire in my 2009 mini Cooper s, but only in cylinders 1 and 2, valves and head gasket have been replaced, as well as timing chain. It runs but the misfire is bad enough to keep it from running for more than 30 seconds

Mechanic's Assistant: Is this your first time dealing with this issue? What size is your engine?

It is the first time. 1.6 4 cylinder

Mechanic's Assistant: Are you fixing your MINI yourself? What have you tried so far?

My mechanic is trying to fix it but we can't seem to find the problem. He checked the timing and replaced all of the valves, the head gasket, the timing chain (That's what caused the initial problem, the guide shattered to pieces in my engine)

Submitted: 2 months ago.Category: BMW
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Answered in 2 hours by:
12/13/2017
BMW Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 2 months ago
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: BMW
Satisfied Customers: 4,837
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles
Verified

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

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BMW Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 2 months ago

Hey how are you,I will try to help you with this issue

what is the fault showing at this time ,P0300 or we have specific P0301 P0302 ?

have you check the maf sensor , if you unplug maf and run it how does it run ?

what is the fuel pressure ?

lets start here and we go from there

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Customer reply replied 2 months ago
P0503
BMW Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 2 months ago

ok dtc P0503 is The Vehicle speed sensor ,that will not cause the misfire ?it will cause shifting problems

what scanner you have to scan ,an obddII small scanner or mini / bmw capable

is there any other fault codes

who did this repair job ,head gasket and timing ,this job is not for the beginners and your chain better be 100% right

did you marks after repairs

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BMW Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 2 months ago

You are very welcome :)

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