I have a 94 Z. I have just about done everything i know possiable to try to get this thing tuned in right and its still runnin to rich. I have uped the ignition completly (all MSD) uped the fuel system with Accell #30 injectors and Accell adjustable reg. I have replaced all the sensors o2,mass,tps, ext.ext. Im lost i have no other ideas that would be causing it. I had it pluged into a computer and all it said was that i was reading rich at my o2 sensors.
Fuel presure is at 45 psi if that is more of a idea...... pm me with some answers if ya dont mind and Thanks for the help

 

Might want to post the specific code you got for the O2 sensors. Who did the tune for the 30# injectors?

Are you sure its a "true" rich condition, and not a false rich? Does the exhaust smell excessively of fuel? Are you getting a lot of carbon in the exhaust tips? Are the plugs showing signs of a rich mixture? Has fuel mileage dropped off?

 

My fuel pressure is 38 psi so i believe i am on the low end. I am not sure if higher pressure makes a difference but i know the computer will adjust it accordingly.

 

Is it tuned for the larger injectors?

You really have given far too little info for a "virtual diagnosis", which is hard under the best of circumstances. Every detail you can think of, plus a history of the problem and a full description of the way it runs are needed. Reminds m, in a negative way, of my work.

Me: Hi, I'm Dr. Krause, what can I help you with?
Patient: I'm sick, doc.
Me: Can you give me a little information to help us out here?
Pt: You're the doctor, you should know.

Rich

 

I have not had any tune done on it at all. I dont know any place around here that can do it. could yall tell me whwere i can get this done

 

PCM For Less does mail order tuning and has a good reputation. In the meantime, put your stock injectors back in.

http://www.pcmforless.com/

Rich

 

38psi with the vacuum compensation line attached is normal. 45psi with the line attached would be higher than normal. 45psi with the vacuum line disconnected would be a shade on the high side, further complicating the fact that the long term fuel corrections can't compensate for the oversize injectors.

Its running rich because you put in injectors that flow 25% more than stock, and the long term fuel corrections can only pull 15% fuel out. You've bottomed out the long term corrections, and you're running on the short terms, which is going to be hit or miss.

 

RE: your sig

You might want to think about urinating a dictionary.

 

My sig has nothing to do with the info that i need. Plus i dont care how its spelled or who care.....Not to diss you or anythig but what differance does it make. I will be the first to say that i cant spell very well at all not a talant that i have therefore i could really care less. Thank you and have a great day

 

Actually your signature is offensive and serves no useful purpose.... but hey, I doubt you care about that at all either. Have a nice day.