stalling/poor idle

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DANNIE
  • MEMBER
  • 1 POST
1994 Chevy 1/2 ton silverado 4x4 350, approx 320,000kms.

The truck when idling low wants to stall, it runs well when moving but whenever you slow down or are at a low idle it wants to quit. We've already replaced a failed fuel pump and ignition module but the problem still exists. Since replacing those parts the truck hasn't stalled, but it wants to and it's running poorly at low rpm's. What could be causing this?
Oct 1, 2007 at 5:15 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the EGR system-could be cracked open with carbon diluting the fresh A/F mixture by leaning it out, like a massive vacuum leak.
Oct 1, 2007 at 5:55 AM
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