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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > Cranking no start after injectors



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      06-27-2020, 09:14 PM   #1
streetworkxs
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Cranking no start after injectors

Just did a cbu clean, changed injectors, fuel filter, glow plugs , glow plug controller and am not getting any fuel. It cranks but no sign of starting. Iíve primed the fuel pump in the functions of pro tool, no luck. My battery dropped a cell and I had to swap battery through this all. Any tips?
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      06-27-2020, 10:01 PM   #2
montr
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See post #10
https://www.e90post.com/forums/showt...ighlight=bleed

If you have the Foxwell NT510, I think it can also do the air bleed.

Last edited by montr; 06-27-2020 at 10:35 PM..
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      06-28-2020, 02:35 PM   #3
RED-d
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That was my post. In retrospect after talking to others I'm suspecting that I didn't crank long enough. I was doing 10-15 second cranks. This may not be long enough to prime the lines and it would loose whatever prime it had when I quit cranking. I've been told 30 second minimum cranks and should start after a few attempts. Make sure you do a prime function (as you mentioned) and have a good charger connected to a fully charged battery.
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      06-28-2020, 04:02 PM   #4
Tambohamilton
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I cracked a nut off on one injector line (highest one), so the fitting was loose, then cranked until I saw the joint wet. Then tightened and started up. This way the pump doesn't need to build pressure before the air starts bleeding out, so cranks can be shorter and still effective. Cranks to start were still longer for the first couple of times after this, until the rail had been fully purged of all air.
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      06-30-2020, 02:08 PM   #5
streetworkxs
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Thanks a bunch guys. Cranking some more did the trick. There's a mechanical pump that only runs when the ignition is cranking.
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      06-30-2020, 03:03 PM   #6
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Correct. No matter how much you prime the lpfp, if the hpfp doesn't turn (needs the engine to turn it), it won't bleed the rail/injectors.
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