Question about 1997 Kia Sportage

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Coil is not firing

My engine turns over but will not start- has fuel and pressure all fuses are fine, coil's are getting power but when test light is inserted into spark plug wire while turning over no power coming out of coils.
Replaced the coils with brandnew ones and same result. What am I missing?

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  • Master
  • 3,489 Answers

This going to likely result in replacing the crank position sensor. This sends a signal to the vehicle computer to tell it when to fire/pulse the coil and injectors. I suspect if you remove one of the injector plugs and insert a circuit tester on the positive side(DO NOT USE A TEST LIGHT using a light "bulb" of any sort, they take too much power and can fry the computer)(the circuit testers use LEDs) that you will not find it pulsing while being cranked. Let me know what you find.

Posted on May 31, 2010

  • keaster97 Jun 01, 2010

    Thank you, I was thinking it was either that or the MAF sensor. I'll try it and let you know.
    Thank again.

  • bubpierce Apr 11, 2011

    What if u have no crank sensor an unhave power to coil but no fire out of coil! This is on a 94 firebird LT1! Changed coil an control module!

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Repeat for all cylinders. (you could also skip the first step and just do this)
If you don't get a spark at a particular plug, then you will need to probe each connection (the wire at the plug, the wire coming out of distributor/coil, the wire coming out of the coil. By doing this you will be able to pinpoint where the damaged component is. If you have nothing into the coil than it is likely an ignition related fuse/relay (solenoid on Fords) is bad.
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Hookup the fuel pressure gauge at check point (hookup point will vary depending on the vehicle but will likely be on the fuel rail or the throttle body on injected vehicles). Also when you rent/buy the fuel gauge ask them to lookup the fuel pressure. Probably around 40psi and up for a functional fuel system (injected) about 4psi for carbureted (look up pressure at parts store or manual for specific application).
If your fuel pressure reads low, then your filter or pump is bad. Replace the filter and recheck, if still low, replace the pump.

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