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Roger, BMW Master Tech
Category: BMW
Satisfied Customers: 3044
Experience:  10 yrs. experience as BMW Master Technician, shop foreman and dealer.
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My bmw 325 I 1994 back fired under hood , wont start now ,

Customer Question

my bmw 325 I 1994 back fired under hood , wont start now , scanner says no communication . checked pistons and valve all good . I then got it started but with very poor throttle response , but if I put oil filler cap it stalls , you can hear back firering pop in intake .
Submitted: 2 years ago.
Category: BMW
Expert:  Steve replied 2 years ago.
Hello and welcome,
My name is ***** ***** it will be my pleasure to assist you today.
Is there high suction under the oil filler cap when you open it?
Customer: replied 2 years ago.
I would have to put it back together and check , when it was running oil filler off slight smoke comes out under low pressure .so I would say no vacuum .
Customer: replied 2 years ago.
hi , all back together , there is no suction at oil fill on valve cover
Customer: replied 2 years ago.