Question about 1995 Cadillac DeVille

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1995 sporatically will not start...starts fine other times

I recently got a used 1995 cadillac deville that has 104,000 miles on it. The previous owner seemed to take great care of the car, but about 2 weeks after I got it, the car wouldnt start while I came out of a restaurant. I went back about 5 times over the next 2 days and it wouldnt start. It would act like it was trying to start, but it wouldnt at all. I called AAA and had it towed the 2 miles or so to my house where it started in the driveway. It started for about the next 15-20 times then one evening I came out of work, and again it wouldn't sat there for about day, i went back with my father to have him take a look at it, and it started right up. I don't press the gas when im starting it up or anything like that. It seems like it has a mind of it's own as to whether or not it's going to start each day. I've kept it over half talk to make sure there is always plenty of gas, etc. Just wondering if anyone may have a solution or clue as to what the problem is.

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  • msa178 Sep 15, 2008

    The fuel pump is what I have been thinking it may be. It's a pretty expensive fix at around $500 or so, so i'm trying to see if I can narrow it down. I don't want to shell out the money for a new fuel pump to find out that it wasnt the problem.

    Any other suggestions?

  • msa178 Sep 15, 2008

    And yes, the battery, and everything else works fine, all guage are on, i ran a diagnostic and it was all clear, no fault codes, no check engine, nothing like that.

  • Steven Brock May 11, 2010

    do the gagues work when you try to start?



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I was thinking it was igniton switch at first. But with the gauges working, that eliminates that possibilty. Second thing I'ld check, would be for fuel. Here's a simple way to tell if it's something with the fuel system. Have a friend crank the motor, while he dose, give it a SMALL shot of starting fluid. People say this can harm fuel injection motors. I've done this trick for many years with no problem. Anyways, if it starts when you give it a shot, well it's your fuel system. Could be a number of things other then your fuel pump, altough fuel pump is the most likely cause. When you first turn the key into the on position, do you hear a hum coming from the fuel tank? If so, the pump is activating. That's good news, that means pump is pumping, but not nessicearly working. Next step would be checking fuel pressure. You need a pressure gauge to do so. Once you find someone who has one, or get it done at a mechanic shop, that will tell you where to go from there.

Posted on Sep 16, 2008

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I can't say I have the perfect solution for you, but I will give you some ideas on checking.

First, an engine requires three things to run.

Fuel/Air mixture

So, start with the easiest ways to eliminate simple problems. A simple tune-up can eliminate a lot of these problems. Start with this list to get a nice tune-up.

Spark Plugs
Spark Plug Wires
Air Filter
Oil Change

Doing those simple steps can both eliminate minor problems and give your car a better running engine. If this hasn't been done for a while, I'd definitely do it.

Now, as for the problem elsewhere. Sounds like it could be a fuel filter causing these problems. Maybe the fuel pump itself.

Does the dashboard have any warning / check engine lights on? If so, you can just drive it out to your local auto parts store and have it tested to see what the car knows is wrong.

I hope this helps. These kind of random problems could be just about anything causing the engine not to run. I've even seen where an extremely dirty air filter caused a problem exactly like this. In the cold mornings the engine would actually start and run, but in the heat of the day where the air is less dense it wouldn't even start. So it could be almost anything or a combination of things. But I'm still lead to believe a simple tune-up may due the trick. If not, I'd check into fuel delivery by changing the fuel pump and having the fuel system checked.

Posted on Sep 14, 2008


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