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m46 320d No power
24-12-2016, 05:35 PM
Post: #1
m46 320d No power
Hi Please advice. BMW 320d start easy, but when accelerate slow. Remove Maf sensor wire better but not to mention, smoke a lot when MAF remove, any advice please
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24-12-2016, 07:28 PM (This post was last modified: 24-12-2016 07:28 PM by Maljan.)
Post: #2
RE: m46 320d No power
Lack of power usually means the turbo is not boosting any more.

[Image: attachment.php?attachmentid=10312&am...mp;thumb=1]

The list of possible problems is quite long. Try this howto guide:

http://www.bmwforums.info/general-guides...ssues.html

Present BMWs:
'89 735i Auto
'01 325i Manual
'02 530i Manual
Past BMWs:
'79 520 Manual, '97 328i Manual, '97 528i Auto, '98 318is Manual
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11-01-2017, 09:58 PM
Post: #3
RE: m46 320d No power
(24-12-2016 05:35 PM)hennies1 Wrote:  Hi Please advice. BMW 320d start easy, but when accelerate slow. Remove Maf sensor wire better but not to mention, smoke a lot when MAF remove, any advice please

Hi Hennie. I had a similar problem however no smoke with MAF sensor removed. It turned out to be a perished vacuum line. Easy to inspect/replace. Remove the engine cover and there will be a vacuum line running top front. If it is broken or bad condition, replace it and see if the turbo kicks in.
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12-01-2017, 11:29 AM
Post: #4
RE: m46 320d No power
Start off with replacing vacuum lines and cleaning out egr. Then clean out intercooler and inspect for boost leaks. Replace oil separator also.

Then remove DPF (better known as CAT)
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