98DODGE STRATUS NO SPARK

  • Tiny
  • j.stieg
  • 1998 Dodge Stratus
  • 6 CYL
  • FWD
  • automatic

I am working on a 98 dodge stratus 2.5v6 and there is no spark. I think it has a electronic distributor, I had the cap off and replaced the rotor. Can I get a diagram, also where is the ignition coil located. What should I try first in troubleshooting?

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Thursday, February 17th, 2011 AT 6:50 PM

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  • Tiny
  • caradiodoc
  • Expert
  • 25,635 posts

Measure the voltage on the dark green / orange wire to the distributor or any injector during cranking. If you find 0 volts, suspect the camshaft position sensor in the distributor or the crankshaft position sensor.

The ignition coil is inside the distributor.

Caradiodoc

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Thursday, February 17th, 2011 AT 9:06 PM
  • Tiny
  • j.stieg
  • Member

I measured the voltage at the dark green/orange wire at both the injector and the distributor and it was 12v during cranking. What should I check now? Thanks

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Thursday, February 17th, 2011 AT 11:42 PM
  • Tiny
  • caradiodoc
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That means the camshaft position sensor and the crankshaft position sensor are working. That leaves the ignition coil inside the distributor or the Engine Computer is not firing the coil. If you have access to a scanner that can fire the coil, that will tell whether or not it is capable of developing a spark. Otherwise I would lean more toward the distributor since the computers don't really cause a lot of trouble.

Caradiodoc

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Thursday, February 17th, 2011 AT 11:56 PM
  • Tiny
  • j.stieg
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I get linking error on scanner. Can I do a resistance check on coil primary and secondary, also can I check computer signal to coil with my meter? A wiring diagram of these circuits would be great. I am going to check and make sure the rotor spins too, thanks!

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Friday, February 18th, 2011 AT 2:13 AM
  • Tiny
  • caradiodoc
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There's an electronic trigger circuit embedded inside the distributor so there's no way to measure the coil. The coil is not available separately either. The only way to replace it is to replace the distributor.

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Friday, February 18th, 2011 AT 2:50 AM
  • Tiny
  • j.stieg
  • Member

Can you get me a wiring diagram for the distributor on a 98 dodge stratus 2.5l engine. I want to check in-coming wires before replacing the distributor. Thanks!

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Friday, February 18th, 2011 AT 3:11 AM
  • Tiny
  • caradiodoc
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The only circuit that could have a problem is the black / gray wire. All the rest have to be working for there to be 12 volts on the dark green / orange wire. That voltage comes from the automatic shutdown (ASD) relay when the cam and crank sensors are working. You would need an oscilloscope to view the signal on that wire to see if the Engine Computer is trying to fire the coil.

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Friday, February 18th, 2011 AT 9:01 AM
  • Tiny
  • j.stieg
  • Member

I don't have a oscilliscope but could really use one. I have analog meter, a 12v LED light, and a clamp around induction strobe timing light. Can I check pulse on that black/gray wire with any of these? Thanks

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Friday, February 18th, 2011 AT 1:06 PM
  • Tiny
  • j.stieg
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Measuring the black/gray wire with a volt meter, It seems that it is always grounded. Is this normal?

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Friday, February 18th, 2011 AT 5:07 PM
  • Tiny
  • caradiodoc
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Don't know. I never measured it so I don't know what to expect. If the computer sends a very short 12 volt pulse to tell the distributor when to fire, then the average voltage would be very low, probably too low to see with an analog meter. If something is shorted in the distributor, that could short out the pulse coming from the computer so there would be nothing to see with a scope. I never did any of that testing. I just replaced the distributor and sent the owner on his way.

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Friday, February 18th, 2011 AT 8:09 PM

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