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Old 11-26-2017, 12:31 PM   #1
tllewellyn

Name: tllewellyn
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lly no start

I have ac4500 that cranks but does not start. it will start on ether and run primed system and holds 10 psi actual pressure on scan tool is in spec when cranking 2 open glow plugs other 6 25 ohms new glow plug controller.warmed up engine still wont start cant be glow plugs.
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Old 11-26-2017, 02:45 PM   #2
pushlar84
 
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Name: pushlar84
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Cranking speed is real critical
Iv seen some that are a little slower and only start in either
The medium duty trucks have a braided negative cable that deteriorates and can cause slow speeds. Iíve changed quite a few of those cables and takes care of problem
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2001 Ram- fuel by Northeast Diesel, 2.6 ED, Allison 1000. Haisley cam, engine & trans built in house
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Old 11-26-2017, 07:11 PM   #3
sootie

Name: sootie
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stupid thing to check but unplug your pcm connectors, clean and reseat at the engine end. i have seen vibration and dust cause them to have contact issues.
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Old 11-29-2017, 09:15 PM   #4
tllewellyn

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thank you but have voltage drop b+ and neg to pcm and run jumpers from battery to block
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Old 11-30-2017, 12:19 AM   #5
smokinVE
 
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What's the rail pressure when it won't start?
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93 W250. With a VE. Very slow work in progress.

2004 Jetta, 1.5 Malone tune, 5 on the floor.

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Old 12-02-2017, 03:25 PM   #6
tllewellyn

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the braided cables took care of problem cranks faster and starts ok
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Old 12-02-2017, 03:27 PM   #7
tllewellyn

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2560psi when crarking
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Old 12-03-2017, 08:45 AM   #8
pushlar84
 
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Good deal
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2001 Ram- fuel by Northeast Diesel, 2.6 ED, Allison 1000. Haisley cam, engine & trans built in house
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Old 12-03-2017, 08:45 AM   #9
pushlar84
 
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Itís amazing what 30 rpm can do
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2001 Ram- fuel by Northeast Diesel, 2.6 ED, Allison 1000. Haisley cam, engine & trans built in house
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