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Depressurize Fuel System on 2006 PT Cruiser

 
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Old 31 Oct 2018, 04:32 pm
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Default Depressurize Fuel System on 2006 PT Cruiser

I need to replace the fuel line in the engine compartment of a 2006 PT Cruiser. The factory repair manual says to first disconnect the fuel pump relay and run the engine until it stops. This is done to depressurize the fuel system. However it appears that in 2006, the factory eliminated the relay that was dedicated to the fuel pump. Does anyone know how to best electrically disconnect the fuel pump so that the fuel line can be depressurized?
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Old 31 Oct 2018, 06:20 pm
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Default Re: Depressurize Fuel System on 2006 PT Cruiser

If your fuel line is leaking, it should leak off the pressure within an our of the key being off.
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Old 31 Oct 2018, 07:00 pm
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Default Re: Depressurize Fuel System on 2006 PT Cruiser

Thanks for the response. Makes sense.

I'd still be interested know the answer to my original question about the best way electrically disconnect the fuel pump, so that the engine could be run and depressurize the fuel system. I think this would be useful if someone needed to replace the fuel pump and the fuel system was leak free.
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Old 01 Nov 2018, 12:18 am
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Default Re: Depressurize Fuel System on 2006 PT Cruiser

Should be a fuse in the box. Pull it
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Old 01 Nov 2018, 03:00 am
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Default Re: Depressurize Fuel System on 2006 PT Cruiser

Quote:
Originally Posted by PTsedan View Post
Thanks for the response. Makes sense.

I'd still be interested know the answer to my original question about the best way electrically disconnect the fuel pump, so that the engine could be run and depressurize the fuel system. I think this would be useful if someone needed to replace the fuel pump and the fuel system was leak free.
The factory manual is wrong. 2006 is the first year of the TIPM system on PT Cruisers. There is a six wire connector on the side of the fuel tank. The two larger wires [ 1 black --- 1 dark green/white ] supply the fuel pump motor. Unplugging the connector will stop the fuel pump from running. And should allow the motor to turn over. I've never tried it.
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Old 01 Nov 2018, 07:26 am
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Default Re: Depressurize Fuel System on 2006 PT Cruiser

Here's what a Chrysler tech posted about this on JustAnswers.com.

Quote:
To be honest with you we just use a couple of shop towels and wrap them around the fitting then loosen it slowly and all the pressure drops real quick. Works real well because even if you get the pump to shut down and the engine stall, it still has pressure in the lines because the injectors shut it off when pressure drops but there is still a lot of pressure still in the lines.
https://www.justanswer.com/chrysler/...-pressure.html

I have personally done this on my 2007 PT and it's no big deal.

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Old 01 Nov 2018, 10:39 am
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Default Re: Depressurize Fuel System on 2006 PT Cruiser

handy i would bet that was a UTI graduate that wrote that.

--

unplug the one and only electrical connector on the fuel tank. it is on the side of the tank, the right/passenger side by all the evap crap.

once disconnected, crank the vehicle and the fuel injectors will purge the pressure.

or do it the arkansas way. i've had gas catch on fire 2x and it usually kills my buzz, so i try to avoid it
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Last edited by rob302; 01 Nov 2018 at 11:16 am. Reason: just saw PT06 already wrote this. lol
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Old 01 Nov 2018, 11:54 am
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Default Re: Depressurize Fuel System on 2006 PT Cruiser

Quote:
Originally Posted by rob302 View Post
handy i would bet that was a UTI graduate that wrote that.

--

unplug the one and only electrical connector on the fuel tank. it is on the side of the tank, the right/passenger side by all the evap crap.

once disconnected, crank the vehicle and the fuel injectors will purge the pressure.

or do it the arkansas way. i've had gas catch on fire 2x and it usually kills my buzz, so i try to avoid it
A UTI graduate? That would be amazing. My son has two buddies that do this for a living. Based on those knuckleheads, I assumed you only had to graduate from reform school to work in a dealership shop.

The amount of fuel loss from this particular pressurized and depressurize line is not that different. Pressurized, you just get a quick spray and with a rag around it, not so much. Depressurized you still get some fuel running out of the line. Overall, this risk should be pretty low without a buzz. I wouldn't recommend anything I wouldn't do myself and not feel safe about it.

Now as for the way I checked the injectors and found the crack in the rail, that's more for the "advanced hillbilly". So I won't go into that one.
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Old 01 Nov 2018, 05:54 pm
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Default Re: Depressurize Fuel System on 2006 PT Cruiser

Quite frankly, I did just that when taking off the injectors during my head gasket job. I don't think there was even 1 teaspoon of fuel that came out and a single shop rag caught all of it. There's a Schrader valve under the end cap on the driver's side of the fuel injector rail that you use to depressurize the fuel rail. The engine off pressure isn't that high and the fuel just dribbles out.


https://youtu.be/CLoL3D1rM2o?t=297
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Old 02 Nov 2018, 10:30 am
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Default Re: Depressurize Fuel System on 2006 PT Cruiser

After 2005 or so, Chrysler removed the Schrader valve to save 2, so this is not an option for this guy
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