Having problems with your 1987 Chevrolet S-10 Pickup ?
Failed emmisions test
\015 It failed due to to much unburnt fuel - I have replaced the plug wires,plugs,cap & rotar,pcv valve,air & fuel filters,changd oil,checked all vacuum lines & plug conections,,,truck runs like a top and gets great gas mileage, what can it be that is causing this problem ? and what do I need to do to resolve this problem ?????\015
Replace the EGR Valve. It may be stuck ,you could try to clean it.but sounds like that might be your problem.
Repair Help & Product Troubleshooting for 1987 Chevrolet S-10 Pickup
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