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The BMW Range
3 Series
m42 Engine Start Problem
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<blockquote data-quote="Logan" data-source="post: 85365" data-attributes="member: 518"><p>You need a special gauge to check fuel pressure and normally most of the BMW w/shop will have one .(not wise to buy one/expensive) </p><p>This gauge is installed and checked just before the fuel enter to the </p><p>injector's railling.</p><p>Better go to a w/shop and ask them to check for you.</p><p>I did mine in P.J. old town (Selvam).</p><p></p><p>When the engine is warm, the fuel pump cannot maintain the required pressure along the fuel line and because of this you need to crank few times.</p><p>This don't happen when the engine is cold. </p><p></p><p>E30's New fuel pump is around RM700 - RM750.00.</p><p>C/shop, i got mine for RM120.00. (after extensive hunting)</p><p></p><p>I have spent a lot time and money changing other parts before identify this problem.</p><p>Personal advice: check this fuel pump pressure.</p><p>(FYI) My M40 fuel pump is inside the fuel tank and no external damper.</p><p>Hope this would be helpful and good luck.</p></blockquote><p></p>
[QUOTE="Logan, post: 85365, member: 518"] You need a special gauge to check fuel pressure and normally most of the BMW w/shop will have one .(not wise to buy one/expensive) This gauge is installed and checked just before the fuel enter to the injector's railling. Better go to a w/shop and ask them to check for you. I did mine in P.J. old town (Selvam). When the engine is warm, the fuel pump cannot maintain the required pressure along the fuel line and because of this you need to crank few times. This don't happen when the engine is cold. E30's New fuel pump is around RM700 - RM750.00. C/shop, i got mine for RM120.00. (after extensive hunting) I have spent a lot time and money changing other parts before identify this problem. Personal advice: check this fuel pump pressure. (FYI) My M40 fuel pump is inside the fuel tank and no external damper. Hope this would be helpful and good luck. [/QUOTE]
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