Hi, I have a 1987 roadster with 12,000 miles on it. I had not driven it for about 4 years and after changing the gas it started fine and ran well, except at idle. After about 200 miles of driving it seemed to be getting worse. Now, if I take my foot off the accelerator, the engine stops even when driving on the highway. Someone told me, and I forget the exact term he used, that whatever allows air into the engine at idle is dirty/blocked. One other thing, during storage, a family of mice did make a nest on top of the engine and I had a local Corvette guy replace all the ignition wires and clean inside the engine and I know he checked the air filter. Any ideas would be appreciated.
Thank you, Charles

Someone told me, and I forget the exact term he used, that whatever allows air into the engine at idle is dirty/blocked. The device you are referring to is the IAC, Idle Air Control. The ECM regulates the amount of air allowed to bypass the throttle blades, via the IAC to regulate the idle speed. The IAC passages, the IAC, and even the whole TB can get carboned and slugded up over time. Based on the history of your car I would think it would be a good idea to remove, disassemble and clean your TB. You will need some TB cleaner and some soft brushes. Be sure to retract the IAC pintle to 1 1/8" before reassembly. You will have ro reset your minimum air adjustment and TPS voltage as part of the installation process. Chances are, you will be amazed at how well you engine idles and responds.

RACE ON!!!

After flushing the fuel did you change the fuel filter? If not, that would be my first step then put a fuel pressure gauge on it to see what it's doing at idle...

It sounds like the IAC. They like to stick when they sit for years.

Plus I live out here in the desert and if you park outside at night the mice like to get in the car and chew wiring.I'd take a look at any exposed wiring around the engine for raw wires.You already said you had a nest.

The device you are referring to is the IAC, Idle Air Control. The ECM regulates the amount of air allowed to bypass the throttle blades, via the IAC to regulate the idle speed. The IAC passages, the IAC, and even the whole TB can get carboned and slugded up over time. Based on the history of your car I would think it would be a good idea to remove, disassemble and clean your TB. You will need some TB cleaner and some soft brushes. Be sure to retract the IAC pintle to 1 1/8" before reassembly. You will have ro reset your minimum air adjustment and TPS voltage as part of the installation process. Chances are, you will be amazed at how well you engine idles and responds.

RACE ON!!!
I agree with you man. Unless you have a bad rubber line give you a bad vacume lick.