MY 1983 MAZDA RX7 CRANKS BUT WONT START. ITS GETTING FUEL AND WEAK SPARK

  • Tiny
  • willie bailey
  • 1983 Mazda RX7
  • 114,000 miles

The car sat for five years. The fuel pump is ok. The carburetor is getting fuel. I swapped the coil, plugs, distributor cap, and rotor with good ones from my 85. There is spark, weak to the plugs

Tuesday, November 22nd, 2011 AT 5:19 PM

11 Answers

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,410 posts

Check crank sensor.

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Tuesday, November 22nd, 2011 AT 5:23 PM
  • Tiny
  • cadieman
  • Member

Pour gas in the intake. Does it start?

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Tuesday, November 22nd, 2011 AT 5:42 PM
  • Tiny
  • willie bailey
  • Member

The plugs are wet, it's getting gas. The spark is present at the plugs, just weak. I can not find a crank sensor in my Mazda book or on lie. Where is it located?

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Tuesday, November 22nd, 2011 AT 6:49 PM
  • Tiny
  • cadieman
  • Member

Im done have fun

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Tuesday, November 22nd, 2011 AT 10:04 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,410 posts

See attached

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Tuesday, November 22nd, 2011 AT 10:19 PM
  • Tiny
  • willie bailey
  • Member

My car is a 1983. It does not have a crank sensor, it has a distributor. The wiring diagram is not for a 1983.

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Wednesday, November 23rd, 2011 AT 1:47 PM
  • Tiny
  • cadieman
  • Member

Did you do what I asked?

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Wednesday, November 23rd, 2011 AT 8:21 PM
  • Tiny
  • willie bailey
  • Member

I poured gas in the carburetor, did not crank, all four plugs are wet. I checked for fire from both coils. The leading coil is producing a stron spark, the trailing one nothing. The car turns over fine, does not attempt to light off. Will it attempt to light off with only one coil? I was going to swap the igniters, attached to the distributor, with the ones on my 85, the 85 has aftermarket igniters. Help?

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Wednesday, November 30th, 2011 AT 2:59 PM
  • Tiny
  • cadieman
  • Member

Pull a fuel sample and see if its good gas. No smell or 2 different fluids in the jar. If ok then replace the fauly bad coil.

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Wednesday, November 30th, 2011 AT 5:27 PM
  • Tiny
  • willie bailey
  • Member

The fuel is new. I swapped the coils, didn't fix the problem. I swapped the ignition igniter, they are mounted on the distributor housing with two smal screws. The no fire condition went from the leading coil to the trailing one. A new igniter cost more than $200.00 dollars. Do you think this is the problem. Once again I have changed the coils, plug wires, distributor cap and rotor, spark plugs and all four plugs are wet with fuel. What do you think?

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Thursday, December 1st, 2011 AT 4:37 AM

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