'85 runs a little rough.

[steveb]

Just got the Vette out from its winter hibernation. A couple of things that I have noticed are as follows.

1. It starts right up and idles smooth. Idle is between 710 and 740rpm.
2. It runs great for the first several minutes of operation.
3. After it warms up, idle is still good but it seems to run a bit rough when cruising down the road.
4. Gas mileage seems to be down.
5. No codes are being set.

My first thought is to go ahead and replace the O2 sensor. Anything else that I should be looking for?

Thanks in advance.

Steve

 

[Bill Heygster]

Plugs, wires, coil, distributer cap, fuel and air filters and fresh gas?

 

[steveb]

Plugs, wires, coil, distributer cap, fuel and air filters and fresh gas?

Plugs are new. Wires are a couple of years old. Distributor cap and rotor are new. I drove the old gas out and filled up with fresh gas. So I guess I can narrow it down to fuel and air filters and coil. Even so, it runs like a champ before it gets up to temp. Thanks for the suggestions. New filters sure couldn't hurt.

 

[Bill Heygster]

Sounds like you're on the right track. Might also try some dry gas additive and/or fuel injection cleaners. There might have been some moisture in the tank. Don't know how long it was in storage but it doesn't take much to gum things up. Best of luck

By the way nice choice of year and color

:L :L :L