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Why does it have a weak spark?

Tiny
MCHUGHC
  • MEMBER
  • 1993 MITSUBISHI ECLIPSE
  • 170,000 MILES
Died while driving. Changed spark plugs, wires, checked gap, distrubtor cap, roter, ecu, mfi, battery and conections still has weak white spark. Will try to start but wont turn over.
Thursday, May 10th, 2012 AT 6:12 PM

3 Replies

Tiny
DJCL
  • MECHANIC
  • 767 POSTS
A weak ignition coil will give you weak spark
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Thursday, May 10th, 2012 AT 6:22 PM
Tiny
MCHUGHC
  • MEMBER
  • 2 POSTS
I tested it too, all within normal resistance.
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Friday, May 11th, 2012 AT 2:34 PM
Tiny
DJCL
  • MECHANIC
  • 767 POSTS
Testing a coil for resistance is not a very good test. The coil is not under a load. You can give it 12 volts with a jumper to make shore your not droping voltage on that line. If it can't jump a spark tester gap or @ least a quarter of of an inch gap and its not bright the coil is week.
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Friday, May 11th, 2012 AT 11:17 PM

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