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there are lots of possible causes:
1: Fuel Mixture too rich, an 86 should have a carburetor so you should be able to adjust the air/fuel mixture.
2: weak spark, causing incomplete combustion, not as likely as #1 but also possible. My '92 stinks of unburnt fuel when it's time to replace the plugs
3: Dead catalytic converter
4: fuel leak.
5: evap. emissions system problem.
What else can I help you with?
Suburban loses power while driving?
Is the engine running ? no
1993 Suburban is skipping while running?
i changed plugs wires throttle p sensor an checked fuel
Where do you put antifreeze in a Chevy Astro van?
directly in the radiator while the van is running
Where can you get a diagram of the vacuum lines on a 96 Chevy Suburban K1500 2WD if the dealership will not give it?
It is important to have a diagram of all the line in a car while owning it. A person can get a diagram of the vacuum lines in a 1996 Chevy Suburban K1500 2WD by purchasing the maintenance or repair manual at an auto part shop.
What would cause your 1996 gmc suburban to shut off while running?
lack of fuel? fuses? fuel pump gone bad?
Why don't my day time running lights work while my low beam lights work on my 99 suburban?
The daytime running lights work of the high beam, check those first.
Ran out of gas in my 2003 suburban put gas in it and it still won't start?
Check the fuel pump fuse for the Suburban, then the fuel pressure. It is possible that the fuel pump went bad while running dry from no fuel.
Why would a Chevy cavalier stop running while driving?
blown engine, out of gas janitorial duties.
What is wrong when your Chevy Tahoe starts to sputter and lose power after running for a while?
You Probley have a blowed head gasket.
Why does battery light come on while 2002 chevy silverado truch is still running?
There is a problem with the charging system.
What would cause an antifreeze smell while engine is running on 2003 dodge ram 1500 with no noticeable leaks and cannot smell from inside the cab?
If you smell antifreeze, there must be a leak somewhere. Have the cooling system pressure tested.
Its a Chevy 350 smokes on start up and sometimes while running?
Most likely bad valve guides and seals. Pretty normal for a high mileage Chevy.
