Let me preface this, with me fully admitting that I know 0% about anything regarding the diesel engines...
Customer dropped off this 6/88 324td touring (German import) with a serious drivability issue. It does not rev up at all. Period. It has a fast idle upon start up (1500-2000 or so, does not surge, and this could be a separate issue entirely) but upon depressing the throttle pedal, any amount, the idle comes back down to 1000.
This is a later style diesel engine, with no throttle body, no throttle cable, etc... it only has a potentiometer under the dash - that is it. There is very little about the 324td on the internet, especially these later style engines, with no throttle cable.
Customer has installed a new OE fuel filter, and a later style potentiometer, from an E46 diesel (the part interchanges, apparently), to which, the problem still remained.
Any advice, from someone who knows the diesel engines, would be greatly appreciated. Just would like to know what direction I should start looking at, before I go down the rabbit hole...
Many thanks.
*** 5 November 2019 update - learned a lot about diesels and M21s in the last couple weeks. determined the engine's mechanical fuel injection pump needed rebuilt. ***
Customer dropped off this 6/88 324td touring (German import) with a serious drivability issue. It does not rev up at all. Period. It has a fast idle upon start up (1500-2000 or so, does not surge, and this could be a separate issue entirely) but upon depressing the throttle pedal, any amount, the idle comes back down to 1000.
This is a later style diesel engine, with no throttle body, no throttle cable, etc... it only has a potentiometer under the dash - that is it. There is very little about the 324td on the internet, especially these later style engines, with no throttle cable.
Customer has installed a new OE fuel filter, and a later style potentiometer, from an E46 diesel (the part interchanges, apparently), to which, the problem still remained.
Any advice, from someone who knows the diesel engines, would be greatly appreciated. Just would like to know what direction I should start looking at, before I go down the rabbit hole...
Many thanks.
*** 5 November 2019 update - learned a lot about diesels and M21s in the last couple weeks. determined the engine's mechanical fuel injection pump needed rebuilt. ***
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