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I'd start by checking for bad sparkplugs/wires, burned valves or a vacuum leak.
Pull the plugs, ONE AT A TIME, and inspect them for damage or carbon fouling. If you haven't replaced the plugs in a long time, just do it.
While a plug is out, screw a compression gauge into the cylinder and have someone crank the engine for you. That piston should come up to compression at least three or four times, watch the gauge, you'll be able to tell when that happens.
BTW, disconnect the coil so that the engine doesn't try to start when you're doing this.
If you replace all of the plugs and wires, the compression is up and even and the engine still runs rough, start looking for a vacuum leak. It could be a vacuum line, the EGR valve (it's on the intake manifold, just to the drivers side of the throttle body), or a bad gasket.
What else can I help you with?
Where can you find a 1995 Chevy G20 van fuse box diagram?
fuse box chevy g20 van
What type of freon to use in a Chevy G20 1995 van?
R134a
What size are the front speakers on a 1995 Chevy G20 van?
4.6
What transmission does a 1995 Chevy G20 van have?
Most common were 4l60 & 4l80
Where is the IAT sensor located on 1995 Chevy G20?
A 95 did not have IAT sensor
Will a 1995 caprice rear end fit a 1979 G20 Chevy van?
NO
Where is the fuel pump on a 1995 Chevy van g20?
I don't think there were any carburetors on the 1995 G20's so it is an electrical fuel pump inside the tank.
What size transmission is in a 1995 astro cargo van?
what size of transmission goes on chevy g20 cargo van 1995
1995 Chevy G20 rockwood bed bench bed?
motor on bed stays runing
Where is the PCM driver circuit located on a 1995 Chevy G20 van?
It is integral to the main ECU
How do you replace the powering steering pump on a 1995 Chevy G20 Chevy van?
Take off the belts then the hoses then the belts holding it on.
Can you take interior from a 1993 Chevy g20 and put in a 1986 Chevy g20?
yes you can.
