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008 Cadillac DTS. Where is fuel shut off switch? 008. 2008.

Customer Question
008 Cadillac DTS Mechanic's...

008 Cadillac DTS

Mechanic's Assistant: What year is your DTS?

Where is fuel shut off switch?

Mechanic's Assistant: Has the vehicle turned into a gas hog? And how does it start -- same as usual?

008

Mechanic's Assistant: Are you fixing your DTS yourself? What have you tried so far?

2008

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Replaced fuel pump. Trickle coming out of engine. Not feeding.

Submitted: 7 months ago.Category: Cadillac
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Answered in 1 minute by:
1/3/2018
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago
David Craig
David Craig, Auto Mechanic
Category: Cadillac
Satisfied Customers: 5,987
Experience: Owner/Mechanic at 3D Automotive
Verified

Hi my name is ***** ***** I'll be more than happy to assist you, Please allow me a few minutes to review your information. Thank you.

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Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

there is no fuel shut off switch on your vehicle

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Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

can you hear the fuel pump running for a few seconds when the key is turned on?

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Customer reply replied 7 months ago
Fuel pump is new
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

i know the pump is new. doesnt mean the wiring isnt bad

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Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

standby

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Customer reply replied 7 months ago
Right so what is your prognosis?
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

if you are positive the pump is running, how did you check to see if its getting to the rail or not?

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Customer reply replied 7 months ago
Would the fuel filter have anything to do with it?
Customer reply replied 7 months ago
Theres a small button in engine when pressed and ignition turned, gas should squirt out but only drops coming out.
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

the filter is part of the fuel pump module. did you only replace the pump or the whole module?

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Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

thats the fuel pressure test Schrader valve.

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Customer reply replied 7 months ago
The whole assembly was purchased.
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

if only a little cam out then you are definitely not getting any fuel pressure up to that point

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Customer reply replied 7 months ago
Ok so what do we check next?
Customer reply replied 7 months ago
What about the fuel pump relay switch? Could that be the cause or is that also part of the pump assembly?
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

no that would not cause the issue if the pump is running when you turn the key on

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Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

you need to disconnect the fuel line at the pump to see if fuel is coming out with the key on

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Customer reply replied 7 months ago
It has to be if we're seeing it in the engine. Just not enough is coming through. I'll give it a try tomorrow. You said something about wiring. What wiring are you referring to?
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

ok. first, you said you can hear the pump running, now you say it has to be. can you please verify the pump is running for a few seconds when the key is on. have someone stick their ear to the fuel door to listen please

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Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

the small drips at the schrader valve is probably residual

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Customer reply replied 7 months ago
Ok, I will when I get another person here tomorrow. I'll ask another mechanic. Clearly you have little patience to be on this site.
Thank you anyway.
Cadillac Mechanic: sprinkles08, ASE Certified Technician replied 7 months ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 24,199
Experience: ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
Verified

Hello and welcome to JustAnswer! I apologize for the extended wait time you experienced, I've only just come online now and would like to assist you with your question.

If you have no fuel pressure then either there is a near complete restriction between the pump and engine, which is unlikely, or the pump isn't creating pressure. The pump may not be running due to a loss of power or ground to it. Depending on where the pump came from it may also still be suspect.

Were the pump's power and ground tested?

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Customer reply replied 7 months ago
The relay switch was melted. It also affected connectors. Will replace those tomorrow.
Cadillac Mechanic: sprinkles08, ASE Certified Technician replied 7 months ago

Great!

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Customer reply replied 7 months ago
Here is the code that came up when connected to check engine code.
Does it mean the main computer has gotten messed up?What causes the P0230 code?The engine control module (ECM) detects the primary fuel pump circuit voltage as below specifications from the fuel pump relay to the ECMThe fuel pump relay main power supply could be low from a blown fuel pump fuse or fusible link, or from a shorted fuel pump or circuit
Cadillac Mechanic: sprinkles08, ASE Certified Technician replied 7 months ago
Did you replace the relay and repair any damage from it's failure?
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Customer reply replied 7 months ago
There was no damage except for the switch which was replaced.
Customer reply replied 7 months ago
What and where would that possible damage be?
Customer reply replied 7 months ago
Disregard last response saying there was no damage.
The connector wire under box was replaced when switch was replaced. Other than that, nothing else seemed damaged.
Customer reply replied 7 months ago
Where would the fuel fuse link be located?
Cadillac Mechanic: sprinkles08, ASE Certified Technician replied 7 months ago
How many power feeds are present at the relay with the key on?
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Customer reply replied 7 months ago
I will need to ask mechanic when he returns tomorrow. I'll get back with the answer as soon as I get it.
Any other information helpful to him at this point with the addition of information I provided is appreciated.
thank you so much!
Cadillac Mechanic: sprinkles08, ASE Certified Technician replied 7 months ago
Let me know and we can go from there.
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