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Loss of power under load... Loss of power under load...
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  #11  
Old 12-11-2016, 03:59 PM
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Originally Posted by upallnight View Post
Sounds more like bad fuel pressure under heavy load. Check the fuel pressure at the rail under heavy acceleration
I don't have any gauge for this.. would any shop be able to check this or dealer only? I will be replacing the fuel filter as I'm sure its probably never been changed unfortunatley, could a soft failing fuel pump also be the culprit?
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  #12  
Old 12-11-2016, 04:04 PM
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Originally Posted by OFLx5 View Post
I don't have any gauge for this.. would any shop be able to check this or dealer only? I will be replacing the fuel filter as I'm sure its probably never been changed unfortunatley, could a soft failing fuel pump also be the culprit?
The Fuel Pressure Regulator is part of the fuel filter. I would replace it soon and see before paying someone to check it out. If you don't know it has been done then expect it hasn't. Glad to see you are getting her back to life. (and not complaining about it!)
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  #13  
Old 12-11-2016, 04:24 PM
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Originally Posted by bhennrich View Post
The Fuel Pressure Regulator is part of the fuel filter. I would replace it soon and see before paying someone to check it out. If you don't know it has been done then expect it hasn't. Glad to see you are getting her back to life. (and not complaining about it!)
Ill be replacing within a day or two. I love the car, wife hates it.. probably cause I put everything from door handles(none of the doors opened from the outside) ), bushings, a wheel bearing, and the parts mentioned in the OP and it obviously still needs some TLC
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  #14  
Old 12-11-2016, 04:32 PM
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Originally Posted by OFLx5 View Post
I don't have any gauge for this.. would any shop be able to check this or dealer only? I will be replacing the fuel filter as I'm sure its probably never been changed unfortunatley, could a soft failing fuel pump also be the culprit?
If you have a bluetooth scanner you can look at live data and see. What the 02 sensor is showing at wide open throttle under load or going up a hill. Stft should be at a positive value.
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Old 12-11-2016, 04:36 PM
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I agree with fuel pressure problem and to replace filter as first step. Sounds like it would be a good idea to replace filter regardless if you might need a fuel pump or something else. And I agree that after replacing the filter the next step should be measuring the rail pressure. No money wasted by replacing the fuel filter especially if it's never been done but going any further without checking the fuel pressure might not be a good idea.
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  #16  
Old 12-12-2016, 03:11 AM
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I got a fuel filter on the way, I'll be replacing tommorrow and posting the results..
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  #17  
Old 12-14-2016, 06:15 AM
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So changed fuel filter and no change.. all though it seems to be a little better.. maybe its just me. Guess a full diagnostics is in order?
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Old 12-14-2016, 11:12 AM
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Originally Posted by OFLx5 View Post
So changed fuel filter and no change.. all though it seems to be a little better.. maybe its just me. Guess a full diagnostics is in order?
With 200K miles on the vehicle you may want to put a new set of coil packs in the vehicle.
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  #19  
Old 12-14-2016, 11:13 AM
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How many miles on your X5?
200k
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  #20  
Old 12-14-2016, 11:30 AM
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I would still look at the fuel pressure at the rail before throwing parts at iit.
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