1999 Chevy Astro no spark

Tiny
JJDCHEVY
  • MEMBER
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 134,128 MILES
I changed coil an ing module and now im not getting spark it ran crapy before now it wont run what should I be lookin at
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Monday, August 4th, 2008 AT 2:18 PM

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Tiny
JDL
  • EXPERT
Did you do any testing, before you replaced anything? Any codes?

Use a spark tester on the coil wire or hold it close to an engine ground, while a helper cranks the engine, is there any spark? Is the coil wire ok?

You could also check for B+ and ground at the coil primary wires. Pink is B+ goes hot when you turn on the key, white with black tracer is ground, there should be a pulse on that wire with the engine cranking.

The rpm signal comes from the crank sensor, hall switch, three wires, ref voltage--ground-- signal. You can check those circuits.
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Tuesday, August 5th, 2008 AT 12:59 PM

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