my 1983 mazda rx7 cranks but wont start. its getting fuel and weak spark

114,000 MILES
Avatar
WILLIE BAILEY
  • MEMBER
  • 14 POSTS
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
Nov 22, 2011 at 9:19 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Check crank sensor.
Nov 22, 2011 at 9:23 AM
Avatar
CADIEMAN
  • ✓Experienced Mechanic
  • 3,544 POSTS
pour gas in the intake.does it start?
Nov 22, 2011 at 9:42 AM
Avatar
WILLIE BAILEY
  • MEMBER
  • 14 POSTS
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?
Nov 22, 2011 at 10:49 AM
Avatar
CADIEMAN
  • ✓Experienced Mechanic
  • 3,544 POSTS
im done have fun
Nov 22, 2011 at 2:04 PM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
See attached
Nov 22, 2011 at 2:19 PM
Avatar
WILLIE BAILEY
  • MEMBER
  • 14 POSTS
My car is a 1983. It does not have a crank sensor, it has a distributor. The wiring diagram is not for a 1983.
Nov 23, 2011 at 5:47 AM
Avatar
CADIEMAN
  • ✓Experienced Mechanic
  • 3,544 POSTS
did you do what i asked?????????????????????
Nov 23, 2011 at 12:21 PM
Avatar
WILLIE BAILEY
  • MEMBER
  • 14 POSTS
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?
Nov 30, 2011 at 6:59 AM
Avatar
CADIEMAN
  • ✓Experienced Mechanic
  • 3,544 POSTS
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.
Nov 30, 2011 at 9:27 AM
Avatar
WILLIE BAILEY
  • MEMBER
  • 14 POSTS
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?
Nov 30, 2011 at 8:37 PM
Avatar
CADIEMAN
  • ✓Experienced Mechanic
  • 3,544 POSTS
IF THEIR ARE 2 INGNITORS AND THE PROBLEM SWITCHS COILS WHEN U SWAP COIL INGNITORS.IF BOTH COILS ARE NEW.YOULL HAVE TO REPLACE THE OTHER INGNITOR.ALSO CHECK FOR THE DIST.ROTOR FOR TURNING WHEN CRANKING.
Dec 1, 2011 at 6:32 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle