Idleing Issue

[pearlnotchback]

Whats up everyone I have an idle problem I cant figure out. My car is a 92 notch with a 306, Edelbrock heads, E-cam, Cobra intake, 6 pounds of boost etc. My car has always idled best right around 1000 rpms. When I am sitting still in traffic for a long period of time my car will all the sudden just drop idle to around 500 rpms and stay there until I go again. After I drive it for a while and hit the next red light its back to normal at 1000 but if I sit there for a long time again it will drop and so on. I have also noticed that the hotter it gets out side the lower it tends to idle so if I raise the idle at the throttle body and get it where I want it the next cool day I drive it she is idleing to high. I feel like i'm going around in circles. Any help or input would be greatly appreciated

 

[jrichker]

See the "Surging Idle Checklist” for help with all your idle/stall problems. You can guess at the problem and throw parts at it, or you can use the checklist to help you find the problem quickly and inexpensively. It’s free and doesn’t cost anything: at last count there were more than 103,000 visits and still climbing

The quick and easy way to dump the codes is in there too, and all you need to do it is a paper clip! The first two posts contain all the fixes & updates. At last count there were 24 possible causes and fixes for surging idle/stall problems. I continue to update it as more people post fixes or ask questions.

 

[pearlnotchback]

I cant use my check engine light to help get rid of the codes because the previous owner installed a florida 5.0 dash in the car and its all autometer gauges none of the stock stuff is there. Anyone else have any ideas on my idle problem?

 

[jrichker]

I cant use my check engine light to help get rid of the codes because the previous owner installed a florida 5.0 dash in the car and its all autometer gauges none of the stock stuff is there. Anyone else have any ideas on my idle problem?

Obviously you didn't read and then think about what you read. You just thought "That won't work for me".
Re-read it and you will find that there is a procedure to use with cars that don't have a working check engine light

 

[stykthyn]

I bought a 15 dollar code reader. Has an LCD display for all the codes. Well worth the money.

 

[pearlnotchback]

I bought a 15 dollar code reader. Has an LCD display for all the codes. Well worth the money.

Where did you get one for that price? Will it erase codes also?

 

[stykthyn]

EBay.