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1999 Chevy Astro Van

Tiny
DANIEL1
  • MEMBER
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 118,000 MILES
I have a 1999 Chevy Astro Van. The analyzer says "Catalyst System Insufficiency Below Threshold Bank 1." If you leave van sit for 3 days, it cracks and backfires when it trys to start. Sometimes you almost have to grind the battery dead to before it will start. What would that readout mean?
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Tuesday, December 7th, 2010 AT 12:36 AM

2 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Catalytic converter has most likely faild / clogged up causing this issue
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Tuesday, December 7th, 2010 AT 1:01 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
That's most likely a worn out Converter. I doubt it's plugged up because in order to set that code, the rear 0/2 has to mirror the front 0/2 and that won't happen if it's clogged. It's likely just not chemically doing the job any more.
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Tuesday, December 7th, 2010 AT 1:07 AM

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