Idle problem
 

I installed a Bbk o/r h-pipe and have steeda mils, the car will not idle right. it will drop down to 100 rpms and surge to around 1400, and sometimes die. What could be the cause of my problem???

Is the car throwing a code at all?

it will when it dies, but after starting again it goes away. keep in mind that the idle problem is mainly after the car warms up.

Checked header to midpipe connections/midpipe to catback connections, anything like that? Are your front O2 sensors in good shape. They determine your a/f, so if one is going bad there is a chance you might have this issue.

I have a 94 plus 8 morgan and i had the same exact problem. it wont start jumping arround untill it heats up right? well anyway i atarted buy changing the fuel filter and putting some fuel injector cleaner in the fuel. then i checked the MAF for oil or dirt. then i took off the intake plenum and cleaned it with Carb R cleaner. after that it seems to be alot better only it idles a little higher. i will let you know if i find a way to fix it.

i know that this is on a morgan, but it could be the same problem! who knows.

exhaust leak leading to a rich condition? could be going pig rich at idle trying to get the skyroketing O2 levels under control. FWIR rich at idle @ normal operating temp = bad. With your foot in it it'll feel slower than normal and at idle it'll try to die.

Another thought is vacuum leak. I had one at one point and at first the car would just try to die at idle now and then, then it through a code, then it wouldn't idle at all, had to ride the gas to keep it going. Fixed the leak, problem went away.