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Vortec 5.7 stumbles and backfires without giving and check engine codes
S10 with Vortec 5.7 from 1998 K2500. Truck has been running perfect for 2 years. Started it up one day and now it stumbles and backfires with low power. No check engine light or codes. Fuel pressure looks fine. New fuel. Put scan tool on and watched live data for O2 sensors and they appear fine...- LilWee247
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- Replies: 30
- Forum: Engine Performance + Maintenance
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kennythewelderOfficially Retired, B31-3 (6-G) certified welder.
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