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 Posted / edited by AnonymousUser on : 19-02-2018

Answers :

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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