1999 Cadillac El Dorado Not starting

Tiny
GFISCHER
  • MEMBER
  • 1999 CADILLAC EL DORADO
  • V8
  • FWD
  • AUTOMATIC
  • 105,000 MILES
My car was starting fine no problem then all of a sudden not starting and just turns over, never a problem before. It does not even back fire or even sound like it will start. How do I get codes? And do you think this could be a fuel pressure regulator?
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Tuesday, December 15th, 2009 AT 6:33 PM

9 Replies

Tiny
FACTORYJACK
  • EXPERT
I doubt a regulator, fuel pressure-certainly. Try spraying some starter fluid or carb cleaner in the intake and see if it fires. This will tell you fuel is absent. Check the fuel pressure, should be around 40-45 psi. From there, if you have no fuel pressure, the next check would be power and ground to the fuel pump.
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Tuesday, December 15th, 2009 AT 10:43 PM
Tiny
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Good day to you,

I pulled off hose and sprayed starting fluid in there, nope would not even fire, so I guess it has to be electrical, but I have no Idea where to start, I will pull a plug wire to see if there's spark, but after that who knows.

Not like my 72 Chevelle that's for sure.

How do I donate?

Thank You,
Gene/Chaska/Minnesota
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Wednesday, December 16th, 2009 AT 9:29 PM
Tiny
FACTORYJACK
  • EXPERT
While you pull a wire, you might pull a plug as well, and check it. See if it is wet with fuel.
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Wednesday, December 16th, 2009 AT 9:37 PM
Tiny
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Hello If no spark what next?

Thanks

Gene
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Wednesday, December 16th, 2009 AT 9:41 PM
Tiny
FACTORYJACK
  • EXPERT
I have to assume you checked spark properly, from a plug wire with a short gap to a ground, or with a spark tester. First let's check for codes, and to see if the PCM is capable of displaying. Press 'off' and the passenger side to 'warmer' on the climate panel until all segments light. After that codes should start display, record any PCM codes or messages. The first step for no spark is to check power and ground to the ignition control module. At the module there is four connectors, we are interested in the three wire gray connector, it will only have two wires in it, a pink and a black. Check with a test light across these pink and black wires, with key on it should light. If it does not light, check from the pink wire to an engine ground. If it still don't light, check the DIS fuse in the underhood fuse block. If it does light, check with an ohmmeter, the black wire to battery negative(do with key off). We would be looking for a low resistance reading(less than.5 ohm). If you have continuity to ground, it may need an ignition module, but let me know the results first. While we are there, let's check the resistance of the crank sensors. There is a 6 wire gray connector with four wires, two on each end. These are your crank sensor wires, sensor A is yellow and purple, and sensor B is black/white and lt blue/white. Measure the resistance of each sensor at that connector, report your findings. I am not sure off the top of my head, what the value is, but I can find out if it don't seem right. First though, check for codes, it may lead to a more specific area to focus your diagnosis.
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Thursday, December 17th, 2009 AT 9:39 PM
Tiny
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First I appreciate your assistance here, very much, and I will donate for sure so this program continues.

I moved the car into heated garage, then when was warm shot starting fluid into intake. It fired, and at one point actually ran till burn fluid up.

I attempted to remove the two fuel lines in back, strange I could not get off, like it needs something to pull all the way off, but there was no fuel there even dripping or coming out with turning engine over.
So now we are looking at a fuel problem, I will try to pull codes this morning.
Thanks Gene
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Saturday, December 19th, 2009 AT 10:47 AM
Tiny
FACTORYJACK
  • EXPERT
Are you disconnecting the lines at the filter?
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Saturday, December 19th, 2009 AT 9:46 PM
Tiny
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Well get this, weird, I pounded on bottom of gas tank with a mallet. It started and then after about 6 tries it wouldn't start again,

Then I raised up rear end and banged it a number of times and I was 12 for 12 then went another 6 times and started every time, weird as hell. Will see tommorrow. Thank You
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Saturday, December 19th, 2009 AT 9:53 PM
Tiny
FACTORYJACK
  • EXPERT
That is a good indicator that you have a failing fuel pump, which is in the tank. Obviously it can't be trusted, needs replaced, I would recommend doing filter at the same time. When you said no spark, I was a bit surprised. These ignition systems are rather bullet proof, and other than some secondary misfires due to an occasional coil, you don't see many problems. I don't believe I have ever seen a no start/no spark on a Northstar, in the 12 years that I have been with Cadillac.
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Sunday, December 20th, 2009 AT 12:09 PM

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