1996 Cadillac Deville Cold start problem

BLFORSYTH

MEMBER
1996 CADILLAC DEVILLE
V8
FWD
AUTOMATIC
130,000 MILES

My caddy will not start right away when cold. After it warms up it starts just fine. Most all ignition and fuel system parts have been replaced already, any ideas? Thank you so much for your time.

Friday, April 9th, 2010 AT 8:25 PM

3 Replies

FACTORYJACK

MECHANIC
4,159 POSTS

Describe the condition when it won't start. Is it an extended crank, accompanied with a rough run and possibly some smoke from the tailpipe? Is it a Northstar or 4.9L? A couple of things to check would include a leaking fuel pressure regulator, there would be fuel in the vacuum line, and for consumption of coolant with no external sign. Another check would be fuel pressure at cold start, does it prime in 2 seconds, and is it adequate(45 psi)?

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Saturday, April 10th, 2010 AT 9:52 AM

BLFORSYTH

MEMBER
2 POSTS

It is an extended cranking and then it stutters and starts and it is a Northstar engine. I am not sure about the smoke from the tailpipe.

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Saturday, April 10th, 2010 AT 10:26 AM

FACTORYJACK

MECHANIC
4,159 POSTS

I would lean towards the regulator, pull the vacuum line from the regulator itself, and check for liquid(raw) fuel. The other causes for extended crank would be fuel pressure, and possibly a missing cam sensor signal. The latter could bring a check engine light, but not necessarily.

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Sunday, April 11th, 2010 AT 12:32 AM