Having problems with your 2002 GMC Envoy ?

Engine lopes while idling or idles erratically

\015 The first time it did that, I replaced the spark plugs and still the same. Next thing I did is I replaced the the fuel filter and still the same.\015 Posted / edited by AnonymousUser on : 10-12-2018

Answers :

1.vacuum leak
\015\0122.leaking egr or plugged pcv valve
\015\0123.ignition components damp or damaged
\015\0124.faulty or incorrectly gapped spark plugs
\015\0125.faulty plug wires
\015\0126.faulty emmission components
\015\0127.air filtr clogged
\015\0128.leaking head gasket
\015\0129.timing chain or gears worn
\015\012first check air filter then check timing with a light make sure its steady if it bounces around the your chain/belt is needing replaced check your wires for frays or just replace them cause their 10 years old
Repair Help & Product Troubleshooting for 2002 GMC Envoy

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