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imola4.8is 12-21-2010 10:33 PM

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! :(

diyanich 12-21-2010 10:58 PM

Quote:

Originally Posted by imola4.8is (Post 789726)
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.

imola4.8is 12-22-2010 03:16 AM

Forgot to mention that I actually replaced the ignition switch two days ago and the problem persists......

TwinsPoppa 12-22-2010 12:19 PM

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. :(

TwinsPoppa 12-22-2010 12:21 PM

Quote:

Originally Posted by imola4.8is (Post 789772)
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?

imola4.8is 12-22-2010 01:58 PM

Quote:

Originally Posted by TwinsPoppa (Post 789837)
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....

imola4.8is 12-23-2010 03:02 PM

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....

Turbo_Bimmer 12-23-2010 03:11 PM

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.

jst2878 12-24-2010 07:22 PM

U should scan with gt1. That will let u know if it's as easy as a faulty gas cap. That was my prob

TwinsPoppa 12-24-2010 08:22 PM

Quote:

Originally Posted by jst2878 (Post 790333)
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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