Question about 1993 Mazda 929

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Car starts but it turns off after a few seconds...help

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A vehicle needs 3 things to run. Fuel, Spark, and Air. So first off, if it is starting at all, the spark must be okay. So a couple things to check...First, check your air filter, make sure the vehicle is getting proper air flow. But mainly...This sounds like it could be a fuel problem. What might be happening, is when you turn your key to the ON position, your fuel pump activates, creating fuel pressure for the moment, but when you start your vehicle, the pressure just isn't enough to keep it running. Check the fuel pressure. It could be some other things also, if this does not help, let me know, and we can go farther into details. :)

Posted on Feb 25, 2011

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Occasionally, about every 6 to 8 times tried, the engine will turn but not start. If I turn the key off for about 3 seconds, it usually starts within a few turns. Do you know what can cause this?
A year, make, model, and engine size would help but I will through this at you.

Instead of just trying to start the car turn the key to the run position and wait 3 seconds. Turn the key off and immediately turn the key back to the run position and wait another 3 seconds. Turn the key off then try to start. Do this every time you try to start the car. If you symptom never occurs when you start the vehicle like this than I would suggest taking a closer look at the fuel system.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

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The way the newer systems work the engine spins at least a few turns while the computer checks everything for correct readings. In the old days it was "cool" to be able to reach in and "bump" the key and have the car start. It meant you had the car tuned perfectly. Now the vehicle computer will not turn fuel on until it is happy with readings. One trick you can try is turn key to full on position and let it sit for a second or two before turning key the rest of the way to crank. This allows the system a second to do it's checking without wasting power cranking. Had Nissan that was just like this. Just wait a few beats before turn to full crank. You can also listen for fuel pump whine in that few seconds, and then hopefully whine to stop when pressure hits full. If whine never stops fuel pump may be getting weak. If you can get access to higher end code reader you can also check for "pending" codes that may be showing up sometimes (holding start up) but then working (so engine finally fires).

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1 Answer

Mi car turn off suddenly
Turn the key on(don't try to start) let it set for ten minutes, Turn it off for thirty seconds. Then try to start. Security is set.

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Sounds like your head is blown, Check oil for water mix. If water is in oil your radiator emptied into your engine block, refilling the radiator won't help.

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I have some info that can help you. Go to this link.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

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I have a 2002 pontiac grand am gt.. i have to start it for about 10 seconds and shut it off then start it again for another 10 seconds i have to do that a few times before it starts. once it starts it...
i would start by taking off the oil filler cap to inspect it and also the oil dip stick to see if there is a white kindof color. if there is then suspect a blown intake gasket. these vehicles are notorious for blowing the intake manifold gaskets. if you find no white coloring in those areas, then try this. first try turning the key over to on for a few seconds( do not start vehicle) just turn it on. then turn it back off for a few seconds. do this for 3 or 4 times in a row then try starting the vehice. if it starts then suspect a weakened fuel pump. if neither of these help, then please repost and i will try father to assist you.

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1 Answer

On frist attemp to start car, cranks then dies after few seconds ckd fuel rail , had no pressure , replaced fuel pump regulator , no help !
do you hear the fuel pump turn on when you turn the key to the run position? If not the check the fuel pump relay.

If the car will start and run for a few seconds then die, It may well be the crank position sensor.

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As a test, turn the key on, but not to start. All of the lights should flash on for a few seconds, sometimes in sequence, then go out. Now, sart the car, some lights may come on and back off. If none stay on after a few seconds of engine running, you are probably ok.

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Hi first you will have to check fuel pressure and spark you said it wants to start and run hope this helps

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I already solve the problem by just having the car key reprogrammed

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