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2008 Cadillac dts,nofuel pressure,relay,fuse and pump ok.

2008 Cadillac dts,nofuel pressure,relay,fuse...

2008 Cadillac dts,nofuel pressure,relay,fuse and pump ok.

Mechanic's Assistant: How many miles are on the vehicle? And when was it last serviced?

131000,dont know when last serviced,recent oil change.performed perfectly for 15000 miles since I owned it.would not start after sitting overnight.

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

Yes. when engine is switched on pump is not turned on for two seconds to provide pressure for starting. checked relay ,found working ok but installed new one since evidence of o ver heating on terminal .applying voltage by jumper to fuse causes pump to run prviding normal pressur

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

Have not checked pcm or cmp or low oil pressure sensor since this not practical for a home mechanic

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Answered in 2 hours by:
3/6/2018
Mike S.
Mike S., ASE Certified Technician
Category: Cadillac
Satisfied Customers: 8,101
Experience: ASE certified
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Hi, I am Mike, welcome. I'm reviewing your question.

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Does the dark green/white wire from the PCM have voltage for those first 2 seconds after the key is first turned to run/ If not, check that same wire right at the PCM pin 13 connector 1.

Mike S.
Mike S., ASE Certified Technician
Category: Cadillac
Satisfied Customers: 8,101
Experience: ASE certified
Verified
Mike S. and 87 other Cadillac Specialists are ready to help you
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Customer reply replied 4 months ago
the circuit you pointed out had a pin burned off and was irreparable . replaced circuit board module under rear seat. 400 dollars part. do you think Cadillac would pay for part ? t.hanksthis appears a common failure. poor design.

I don't think they will because it's not covered under warranty.

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