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?
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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