Engine runs rough, sort of a lopping.

1992 BMW 525I
275,000 MILES • 2.5L • 6 CYL • RWD • AUTOMATIC
Avatar
PAULJONES
  • MEMBER
  • 1 POST
My car was running rough and idling real rough like a lopping. When at idle it sounds like it's going to cut off but it doesn't. It stutters when I start to take off and stutters when I try to accelerate. I have changed the spark plugs, the fuel pump, fuel filter, and some vacuum hoses. It now runs better, but It still runs rough.

What do you think is the problem?
Sep 17, 2015 at 10:01 PM
Advertisement
Avatar
DOCHAGERTY
  • ✓Experienced Mechanic
  • 9,606 POSTS
With 275k on the clock, it would be very difficult to properly answer the question without pointing out that at that mileage, the head probably needs to come off and go to the machine shop. Also injector spray patterns due to dirty injectors can cause stumbles and rough idle. Google BMW stomp test and perform that operation and see if there are faults present
Sep 19, 2015 at 12:25 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle