Its a 1999 528i bmw that will start but wont stay running also there is a loud kind of backfire noise from one of the cylinders .
the engine wont rev up proper even though i keep pressing the throttle and eventually just dies until i start it again .
HELP
If you've never replaced the timing belt or chain,That would be my first thing I'd check is the Timing belt or chai, just aline the timing marks on crankshaft and then look at the position on the distributor to see if it's pointed in the #1 firing position .
SOURCE: its a 1998 528i bmw
The fact that you have a backfire noise that you can trace to just one cylinder makes it sound like a spark plug could be loose or broken. Pull out your spark plugs and examine them. On a '98, that eill mean pulling off the plastic cover, then removing the coils (need a 10mm socket, be careful with the ground wires) and then reach down in with a small spark plug socket on a long extension.
Also, look for a massive air leak on the intake. Take apart the air tubes from the air filter up to the throttle body looking for air leaks. You could also have a leak at the intake manifold gasket but you may need help to check for that.
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thank's guys very helpfull the engine runs sound better than ever,
**** / ireland .
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