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Old 06-17-2013, 10:58 AM
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Long crank time

I have had a long crank time on my pickup for a while now and thought that it would go away when I replaced the plug in the back of the passenger head oil galley that was leaking. I've noticed that after I fixed the problem it still had a long crank time. I then had a no start issue that I tracked down to my alternator, but in the process of doing that I had a fuel pressure guage on the pickup and I noticed that as soon as the engine was shut down the fuel pressure dropped to nothing within about 15 sec. I am wondering how long the system should hold pressure and where to check first.
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Old 06-17-2013, 09:04 PM
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Anyone?

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Old 06-18-2013, 01:02 AM
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It has a mech fuel pump, should go to zero pressure as soon as it cuts off, and for you long cranking, does it smoke white while doing so? How old are your glow plugs and glow plug relay?
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Old 06-18-2013, 08:45 AM
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that stuff is fine, they were done when head gaskets were replaced, it starts the same no matter what temp it is, it has been in the 80's and 90's here lately so the glow plugs aren't a factor. I wasn't sure if the fuel pump would hold pressure or not and it will crank for 10 sec or so before it starts and it takes that long to build up 25 psi.
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Old 06-18-2013, 09:06 AM
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90F is still "cold", in terms of engine temperature; still needs glow plugs. Is there still a long crank time when the _engine_ is warmed up?
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Old 06-18-2013, 09:33 AM
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Well they also need 50psi to start iirc
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Old 06-18-2013, 09:47 AM
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yeah I can have the engine fully warmed up, shut engine off and immediately try to restart and it cranks for a while before it will start just like first thing in morning or after it has sat. According to the specs from alldata and identifix the fuel pressure should be 25 cranking and 55-65 idle.
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Old 06-18-2013, 09:49 AM
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I first thought the long crank time was cause I was loosing oil from the oil galley and from hpop and after those were resealed its still the same way so I'm confused.
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Old 06-18-2013, 10:50 AM
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Check the hpop res? It may be leaking down and not keeping it in there to supply the pressure immediately
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Old 06-18-2013, 10:52 AM
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Ok, should I check it after it has sat for a while or right after I shut it down?

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