Ok folks heres the deal and I'll try keep it short.
I just bought my 1st 3rd gen a 91 Z28 305tpi A4.
The car ran really rich when I got it(lots of black smoke)
Pulled the plugs, they were nasty black platinums. I also ran the 3 year old gas out of it. And cleaned the throttle body.

I runs a lot better and not no where near as rich, and it's a lot more responsive.

It is still rich. Cold & hot starts are excellent. When I'm driving around at around 35-40 mph in overdrive the car feels like its loading up.

When I did my searches everyone that needed a fuel pressure regulator also seemed to have problems with cold starts as well. So I'm not quite sure it is that.

I still have to change to O2 sensor and check the timing.
What do you tpi guys think?

 

BTW it's not not throwing any codes.

 

are the fuel injectors the stock 19 lb injectors? bigger injectors could dump to much fuel causing it to run rich.

 

Yes they are stock. The car was purchased from the original owner and I have every receipt of all the work done.
The plugs were all the same when I pulled them, so I would like to believe that it's not a faulty injector or two. That doesn't mean that they aren't worn. But but before I start throwing parts at it I'd like to start with the simple things first.

 

hey i just got a 1986 camaro with a 92 v8 5.7 liter engine in it . the car was running really crappy so i had to change firing order on the car it was running alot better.. but still wasnt right about a week later i discovred the smog silinoid was disconnected from the terminal where it goes into the top of the engine also the electric was not pluged into the conponent. i did some research and found out the correct way to hook it up .. i started and drove the car about 5 blocks car seamed to be running better then ever smooth and more power . after i turned the car off and tryed to start it up the next day .. car does not start .. as u hold the exnition and pump the gas the engine gets slowly to full running speed as if its running and when i let go of the exnition it turnes off as quick as i let go ?? i also tryed removing the smog silinoid back to how i org found it still same story any suggestions ?? thanks

 

Update on my problem. I changed the O2 sensor and the car is running alot better.

I have to ask. When you said you changed the firing order what did you change it to, or how did you change it?

 

what i did is go only looked up the firing order for 92 camaro then what i did is took off the distributor cap took out spark plug one witch was located in the front right if your looks down at the engine found where the starting point was on cap by feeling with a screw driver for the number one piston to be all the way forward then used firing order accordanly