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The BMW Range
5 Series
Hard starting E34-M20
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<blockquote data-quote="ehoe" data-source="post: 2721" data-attributes="member: 141"><p>My E34 seems to have a harder time starting lately. It used to only need 2 or 3 cranks to get the engine started but lately noticed that it needs at least 5 - 6 cranks to get it going. This is more noticeble when the engine is warm/hot, in the morning it seems to start easier. I suspect it could be due to a weak fuel pump, perhaps fuel pressure is low or something. However when i do get the car started there is no problems it runs fine. What are the tell tale signs of a fuel pump about to go?. BTW I have renews the fuel filter only recently so it can't be a clogged or dirty fuel filter. Oh and also when you turn the ignition to the 'ON' position just before starting, is the fuel pump suppose to come on?. I thot normally when it is turned to the 'ON' position the fuel pump would come on but I can't hear the fuel pump running. Or perhaps the fuel pump on comes on when you are actually cranking the engine? Anyone can confirm this?. Or anyone has had similar symtoms as me and know what could be possible causes of the hard starting?. Thanks in advance.</p></blockquote><p></p>
[QUOTE="ehoe, post: 2721, member: 141"] My E34 seems to have a harder time starting lately. It used to only need 2 or 3 cranks to get the engine started but lately noticed that it needs at least 5 - 6 cranks to get it going. This is more noticeble when the engine is warm/hot, in the morning it seems to start easier. I suspect it could be due to a weak fuel pump, perhaps fuel pressure is low or something. However when i do get the car started there is no problems it runs fine. What are the tell tale signs of a fuel pump about to go?. BTW I have renews the fuel filter only recently so it can't be a clogged or dirty fuel filter. Oh and also when you turn the ignition to the 'ON' position just before starting, is the fuel pump suppose to come on?. I thot normally when it is turned to the 'ON' position the fuel pump would come on but I can't hear the fuel pump running. Or perhaps the fuel pump on comes on when you are actually cranking the engine? Anyone can confirm this?. Or anyone has had similar symtoms as me and know what could be possible causes of the hard starting?. Thanks in advance. [/QUOTE]
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Hard starting E34-M20
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