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Posted on Jan 28, 2018
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I have a 1999 Mazda Astina, I have crank and cam angle sensor signals, but I have no injection pulse or coil spark. I think it may have something to do with the immobiliser but I have no testing proceedures for it. The immobiliser light does not illuminate under any conditions. All fuses are good

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Bill Boyd

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  • Mazda Master 53,816 Answers
  • Posted on Jan 28, 2018
Bill Boyd
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Joined: Jan 04, 2013
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Have the fault codes read
indicates a problem immobilizer or the ECM needs resetting with a scan tool

5 Related Answers

Anonymous

  • 96 Answers
  • Posted on Aug 10, 2008

SOURCE: 2001 mazda protege will not start

well, with all that you have changed the only two possible things that are left PCM and the ECM....

Do you have an alarm system on this vehicle? If you purchased this car second hand it may have something that is inhibiting the engine from firing. From what you have told us here that would be where I would start looking.

I really hope this is helpfull

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Anonymous

  • 5 Answers
  • Posted on Oct 18, 2008

SOURCE: 1998 mazda capella.injector pulse no spark. 4 cyl

Sherylpuha,

Have you checked the coil from where the spark comes from and the computer sensor fuse block?

Anonymous

  • 218 Answers
  • Posted on Mar 03, 2009

SOURCE: Battery for 1997 Mazda 323 Astina 5dr hatch

It's fine to use a battery with a higher cold crank rating than original. Consider the rating in the manual to be a minimum requirement. You'll be fine as long as the physical dimensions and terminal placement are compatible with your car. The battery manufacturer's guide should tell you which battery fits your car.

Anonymous

  • 6 Answers
  • Posted on May 27, 2009

SOURCE: mazda astina pop up lights wont go back down

Try to check if there is something stuck to the motor of the pop-up lights mechanism. You can see it below the fenders. The fender liner should be removed.

Anonymous

  • 100 Answers
  • Posted on Sep 09, 2009

SOURCE: 1989 mazda astina 323 5 spd manual clutch fluid??

Check the brake fluid resovoir, on the side there could be a hose coming off it part way down the side sharing the brake fluid to the clutch master cylinder

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Hyundai sonata 2006 no injection pulse there's spark to plugs
Is there an RPM signal reading on the scan tool when the car is cranking? If there's no RPM signal, it's likely there's a problem with the crank sensor or cam sensor. An RPM signal usually indicates the two are good.

If you're getting an RPM signal, I'd back probe the injectors, and look into confirming you have good supply voltage, and a steady 12V on the injector control wires. I'm assuming the injectors are switched on by the computer ground.

If the voltage stays low or remains at 0v on the control wires, you have to look further into the circuit feeding the injectors. A wiring diagram would be best.
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Wont start. it has injector pulse but no spark
is there power and ground to the coils?

If there is injector pulse than the crank sensor has to be good. Injector pulse and spark are both calculated off from the signal from the crank sensor.

Checking for power and ground to the coils is a good place to start. If that checks out than either there is a wiring issue in between the PCM and the coils or possible the PCM has failed.

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

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An OBDII scanner will indicate which sensor is defective. If the engine ran fine before you turned it off, and now it will not start, the problem is likely the crank angle sensor (close tot he crank pully). Otherwsie, oif the engine starts sometimes and not others, it is due to a defective cam angle sensor (near the intake cam "gear" (where the timing belt cover is).
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You are correct in your understanding. If the coil has at least 12 volts and gets a ground signal from the computer, the coil should fire. The coil actually sparks when the ground is removed.
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Loss of injection pulses usually means a loss of an engine timing signal or even the security pack preventing the vehicle from starting.
You need to check all the timing signals, crank angle sensors, cam angle sensors etc and ensure that any security is disabled or turned off.
Check for spark, if you have spark but not injection pulses, then its a timing signal issue. If you dont have spark or injection pulses, also check the ECU (the cars computer) although I do not know of any issues with this make and model.
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