99 S10 4.3. Truck sat for couple years. No start. Replaced spider.

Asked by silvercoyote Sep 17, 2014 at 04:44 PM about the 1999 Chevrolet S-10

Question type: Maintenance & Repair

When first start runs rich. It will eventually put check engine light on. Which says engine misfire. Let engine warm up runs great. Only time it gives a problem is when starting up cold.

1 Answer
50,795

John answered 9 years ago

Sounds like you need to clean the EFI and injectors since it sat for so long. Junk will settle and solidify. This will throw off your sensors and screw up your computer so it doesn't know what to send to the pistons/cylinders. Also check or change any fuel filters and air filters.

Mark helpful

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