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  #1  
Old 12-21-2010, 10:33 PM
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Starting Issues - 4.8is

I have a 2005 X5 4.8is with about 71k miles now and have had some difficulty starting it. It starts fine first thing in the morning, but after I have driven the car and let it sit for 1 to 2 hours and come back to start it, the starter will run for 15-20 seconds before it actually starts.

Again, no starting issues when the car has sat overnight, but once it gets driven and is left for a couple hours, that's when I have trouble starting it. The starter sounds like it is running very strong. I have scanned the entire car twice now using a GT1 scanner and there have not been any codes at all.

Help!
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Old 12-21-2010, 10:58 PM
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Quote:
Originally Posted by imola4.8is View Post
I have a 2005 X5 4.8is with about 71k miles now and have had some difficulty starting it. It starts fine first thing in the morning, but after I have driven the car and let it sit for 1 to 2 hours and come back to start it, the starter will run for 15-20 seconds before it actually starts.

Again, no starting issues when the car has sat overnight, but once it gets driven and is left for a couple hours, that's when I have trouble starting it. The starter sounds like it is running very strong. I have scanned the entire car twice now using a GT1 scanner and there have not been any codes at all.

Help!
Usualy in these cases people start with checking out the ignition switch.
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Old 12-22-2010, 03:16 AM
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Forgot to mention that I actually replaced the ignition switch two days ago and the problem persists......
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Old 12-22-2010, 12:19 PM
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When my battery was going bad, I had a several episodes of cranking and not starting instantly - however it was never 15 - 20 secs. It was more like 2 more secs.

Simple to have the battery checked just in case though.

I guess it could be several things - maybe coil, fuel injector? Wonder if one of the sensors like MAF or oxygen could cause this?

Sorry, not being much help am I.

Last edited by TwinsPoppa; 12-22-2010 at 02:54 PM.
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Old 12-22-2010, 12:21 PM
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Originally Posted by imola4.8is View Post
Forgot to mention that I actually replaced the ignition switch two days ago and the problem persists......
Prior to replacing the ignition switch, did it have the same symptoms you're talking about?
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Old 12-22-2010, 01:58 PM
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Originally Posted by TwinsPoppa View Post
Prior to replacing the ignition switch, did it have the same symptoms you're talking about?
Yes. The starting issue is what prompted me to get a new switch only to continue to have starting problems....
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Old 12-23-2010, 03:02 PM
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Any other ideas? I am about to throw a new fuel filter on. Probably not the culprit, but it has never been replaced and figured it would be a good idea....
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Old 12-23-2010, 03:11 PM
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May be you have a leaking injector(s).
Next time, while cranking, try to floor the gas pedal to force the DME into 'flood clear' mode to see if it makes a difference.
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Old 12-24-2010, 07:22 PM
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U should scan with gt1. That will let u know if it's as easy as a faulty gas cap. That was my prob
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Old 12-24-2010, 08:22 PM
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Quote:
Originally Posted by jst2878 View Post
U should scan with gt1. That will let u know if it's as easy as a faulty gas cap. That was my prob
Unfortunately, he had it done twice on the GT1 and no codes. I had a similar problem in my old goat when the starter got hot because I forgot to put the heat shield back on. But that car was much simpler to diagnose than these BMWs.
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