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Old 01-16-2020, 04:14 AM   #1
jamie
 
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Default 2003 hard start

Good evening, I have a 03 T1, 170 miles. I am in Silver Spring, Md. Weather is mild.
Glow plug light went out. Glow plugs & module , 3 fuel injectors were replaced a year ago.

Occasionally for the last two months it is hard to start, until tonight it would start after 3-5 try’s , but it would crank hard, sounding similar to trying start after changing fuel filter.
I’m thinking it’s fuel related, at the fuel ( I’m using one w/sensor) filter the clear fuel line doesn’t have air bubbles in it.
I cranked 10-15 times tonight but it would not start.
I may try to replace the fuel filter.

Last edited by jamie; 01-16-2020 at 12:24 PM.
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Old 01-16-2020, 05:42 AM   #2
NelsonSprinter
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Default Re: 2003 hard start

We do need to know where it is . Is it in winter or summer conditions?
Winter might mean gelled fuel, water frozen in filter. Summer might mean worn injectors reducing fuel pressure to below allowable limits.
Does the glow plug light go out?
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'02-'03 Fuel filter leak fix http://sprinter-source.com/forum/sho...ix+fuel+filter
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Last edited by NelsonSprinter; 01-16-2020 at 05:44 AM.
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jamie (01-16-2020)
Old 01-16-2020, 01:10 PM   #3
Crosscut
 
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Default Re: 2003 hard start

I found the Autel AP200 invaluable for diagnosing similar problems, I still haven't got to the root of the issue but at least I know what is going wrong.

Leaking fuel system, lets air in and therefore struggles to achieve pressure.
Replacing the O rings on the voss connectors (plastic fittings with white clips) is helping my leaky system, each time I get round to swapping one out it gets a little better. I now no longer worry about being stranded unable to start it.

The other thing causing me problems was a tired battery, the starter was unable to get the revs high enough
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jamie (01-16-2020)
Old 01-16-2020, 02:46 PM   #4
vanski
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Default Re: 2003 hard start

You may also want to investigate cam and crank sensor synchronization.. sometimes they can intermittently fail without throwing a stored code.. but if you catch it in the act you can see a current code. This can get to be a ton of fun when there’s both a small air intrusion leak in fuel system causing over cranking causing voltage drop across the power system causing the cam/crank sensor intermittent failure. A good scanner, I guess the Autel AP 200 has worked for many, should help you get to the bottom of it.
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Old 01-16-2020, 02:59 PM   #5
hkpierce
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Default Re: 2003 hard start

High on my list, if it hasn't been done within the last 50000+, would be the fuel regulator. https://sprinter-source.com/forum/sh...8&postcount=11
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Old 01-16-2020, 04:18 PM   #6
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Default Re: 2003 hard start

Could be a bad EGR. Try unplugging the EGR and see if it starts easier.
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