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Brokenbmw1 02-11-2012 03:32 PM

Loses power
Hi guys, my car is a 2.8i 5 series auto, from cold its fine but once engine warmed as soon as you switch car off the return and start again it plays up, when turning key it turns over 2-3 times before starting up, you know then its going to do the following, it wont pull, and even on a flat it has no power, if you put in park and rev it sounds like a misfire, popping sound maybe like its sucking air, wonder if this is when starting its sucking the air then thus causing it to run lacking power, you can put your foot down and it still dosent respond, any ideas would be most be most helpfull

Cheers kev

DEATH2000 02-12-2012 02:51 AM

Have you taken it in to have the OBD system scanned for Codes? Sounds like its in Limp Mode possibly. Other then that maybe a Throttle Position Sensor (TPS)?

Brokenbmw1 02-12-2012 07:44 AM

Hi thanks for your reply, havent had codes read yet, was trying to eliminate anything simple first, also dont know if its connected but after i turn off ignition the oil can light stays on but its not red but outlined in yellow, it goes out only after switching ignition on then turning off again, any ideas cheers kev

Brokenbmw1 02-12-2012 07:45 AM

Update forgot to mention, dont know if connected to original problem but after switching ignition off the oil light can stays on but isnt red but outlined in yellow any ideas cheers kev

DEATH2000 02-12-2012 09:29 AM

Getting it scanned is usually free at most auto parts stores. I like to recommend that because it can give you a good base of where to start. In the E34/39/60 section I have posted the link to a copy of the Bentley Service manual which has an excellent troubleshooting and diagnostic guide. They are very handy.

As for the issue with the oil light i have to say I have never herd of that happening and I'm not sure why it's doing it.

Brokenbmw1 02-16-2012 11:25 AM

Hi again, i remember actually sometime ago it was scanned and nothing came up, any ideas why or what this may point to cheers kev

DEATH2000 02-16-2012 12:07 PM

Well their are four essential components to make a combustion engine run. They are:
1. Fuel
2. Air
3. Spark
4. Compression

If anyone of these is missing the car won't run. How was the car running before this? Did this problem occur suddenly?

If you have never changed your fuel filter, spark plugs or cleaned your Idle Control Valve (ICV) now would be a good time. The fuel filter can get clogged up and effect the mount of fuel going to the engine.

Now, one thing to also look t that is really important: how are all your vacuum lines? Check all your hoses and connections for either a lose hose or a crack or tear in the hose. A vacuum leak has been known to make cara run poorly. Vacuum lines are cheap too if it is damaged. But go get a good light and inspect them all. A crack may be very hard to see so look carefully and feel them too. If you need assistance the Bentley Service Manual has some excellent pictures and instructions to help you.

Brokenbmw1 02-16-2012 04:55 PM

Thanks for your help, i will try all these tomorrow cheers kev

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