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It just doesnt start. Starter trying to crank, but not

Customer Question
HI. It just doesnt...

HI. It just doesnt start. Starter trying to crank, but not cranking. Battery is new. Starter checked - working

Mechanic's Assistant: Have you checked the fuel supply? And are all the spark plugs working?

2003 3.2 Yes I can start it only with jumpers Then voltage in system is more than 12.8 volts

Mechanic's Assistant: What is the model of your '03 Cadillac?

cts

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

Yes, trying to do it myself..

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

If I jump starter relay mechanically, starter is cranking, but usualy not starting. After few attemps it starts

Submitted: 2 months ago.Category: Cadillac
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Answered in 3 minutes by:
12/21/2017
Cadillac Mechanic: David Craig, Auto Mechanic replied 2 months ago
David Craig
David Craig, Auto Mechanic
Category: Cadillac
Satisfied Customers: 4,704
Experience: Owner/Mechanic at 3D Automotive
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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 2 months ago

when you turn the key to start, is the theft light going out?

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Customer reply replied 2 months ago
From zero: 2003 3.2 CTS. Battery is new, starter fully tested.
It doesnt start with key. Just making short crank sound.
Battery voltage about 12.4
Cadillac Mechanic: David Craig, Auto Mechanic replied 2 months ago

what does the voltage drop to when trying to start the engine?

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Customer reply replied 2 months ago
Not much. 0.2 - 0.5 volts. If I use jumpers and after few minutes battery shows 13v, everything is fine.
Customer reply replied 2 months ago
All relays checked, cleaned and tested. If i push starter relay manualy (With ignition on) its crankig and engine starting for few seconds.
Cadillac Mechanic: David Craig, Auto Mechanic replied 2 months ago

there's no way it only drops that little when trying to start the vehicle(without jumper cables.) please go test it again.

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Customer reply replied 2 months ago
After few attemps, usualy it starts. If starts, everything working fine.
Cadillac Mechanic: David Craig, Auto Mechanic replied 2 months ago

ok, since you do not seem to want to answer my question about the voltage, have the fuel pressure tested. can you do that for me?

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Customer reply replied 2 months ago
I will check voltage later and inform you.
Now Im not in the car. What else i have to check?
Cadillac Mechanic: David Craig, Auto Mechanic replied 2 months ago

just let me know about the voltage and the fuel pressure then we'll go from there. thank you

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Cadillac Mechanic: David Craig, Auto Mechanic replied 1 month ago

hows it going?

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Cadillac Mechanic: David Craig, Auto Mechanic replied 1 month ago

??

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