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VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old October 12th, 2017, 15:13   #1
94cobra2615
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Default Normal to still fuel with solenoid wire off?

Doing a compression check and hinged the injector fuel lines up a little so I can get the compression tester hooked up.

While cranking engine over and the shutoff solenoid wire disconnected, I'm still getting fuel squirting out the fuel lines.

I didn't think any fuel was suppose to pass....
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Old October 12th, 2017, 15:33   #2
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yeah, some fuel dribble is normal...it's not enough to pop the injectors though
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Old October 12th, 2017, 15:35   #3
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It shoots out pretty good.
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Old October 12th, 2017, 16:00   #4
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Quote:
Originally Posted by 94cobra2615 View Post
It shoots out pretty good.
normal... compared to normal flow and pressure with an open solenoid it's nothing
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Old October 12th, 2017, 16:57   #5
Vince Waldon
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Yup, gotta disconnect the IP entirely (big black connector) to be entirely safe when doing a compression test.
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Old October 12th, 2017, 21:57   #6
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Resolved my issue I was trying to fix.

As everyone stated, this wasn't the problem and is normal.

Thanks for the help.
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Old October 13th, 2017, 08:19   #7
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Quote:
Originally Posted by Vince Waldon View Post
Yup, gotta disconnect the IP entirely (big black connector) to be entirely safe when doing a compression test.
Could a fuse be pulled that controls the ECU??
Might be easier and safer then moving old insulated wires that might crack.
Maybe relay 109. Also good time to check the condition of the contacts inside it.
Fuse 10, 29, 32, 34, and 43 are listed to 'engine'
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Old October 13th, 2017, 08:26   #8
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That would certainly work too.

For me personally I'm more comfortable mechanically pulling a connector apart that guarantees the pump is dead, as opposed to hoping I've gotten every single fuse in the "engine" category. I use it as an opportunity to spray in a little DeOxit while I am at it.
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Old October 13th, 2017, 09:18   #9
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if you pull relay 109 it kills the power to all the engine control fuses
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