Got code 45 rich condition. car stalls when i press the clutch pedal and/or come to a stop sometimes the car will start up and will shut off instantly, i need to stay on the accelerator in order for it to remain on.. this problem started when i changed the strainer screen on the fuel pump, when it happened i checked the tank again and noticed that fuel was leaking out from the fuel tank. where the fuel sending unit is mounted on top of the tank and the o ring seal was moved around. made sure the leak was gone and after that the car ran fine till a couple of days ago I almost missed a stop sign and slammed on the brakes and downshifted and shook the car a bit. After that the car started to do the same again but this time the car takes a lil bit longer on starting and i have to stay on the gas so it can turn on. i dont get it how could that make the car run rich.... or what else could it be? :/

 

I'm not sure, i just replaced the 02 sensor figuring that would fix it and no luck, I have the 305 TBI, I did just remove the smog pump, and ac, put in the delete kit for the ac and ran a different belt, Have lack in power as well, its like sometimes it will take off like a bat outa hell, others, like she's draggin another car

 

looks like my problem was the carcoal canister and some old vacumm and fuel lines going to it and from it.

 

my 91 z28 had a similar issue(may not help you as mine was automatic but ill give you a list of things that were wrong with mine ..btw mines 100% better now) ok
1.1 bad injector
2.egr was clogged
3.fuel pump and fuel filter were bad
4.bad ground from distributor
5.bad connections to the ecm
6.bad o2 sensor
7.tps needed to be set correctly/iac
8.cts(coolant temp sensor) was shot (although my fans still dont work,the computer gets proper information with the new switch,,i ordered hayden fan switch to operate fans at a better tempp anyway)

so that is the list of problems i had and yes they are all related to a stalling/rough idle condition...also check vaccums and be sure to test original parts before replacing (mine were in fact tested before replaced (minus egr that was just filled with carbon) this forum is great to find instructions and how to's) good luck with it!! and i really hope some of this is useful otherwise im sorry for taking up space in your thread

 

What mine still does is that it stalls under hard braking, but the Service engine light doesn't come on anymore but ill check for codes in the computer to see whats up