My 93 Z keeps throwing a heated O2 and fuel lean code. They guy I bought the car from did a poor job on deleting the egr and the car is smoking once hot. I can smell the exhaust inside the car and can't stand behind it when its running. I jus downloaded datamaster tts and was wondering if it would help me with this problem

 

What are the EXACT numerical codes? The 93 does not have heated O2 sensors. Even if you converted to heated sensors, the 93 ECM could not detect a problem with the heater circuits or set a code. Are you using the correct 93 code list, as shown on the right column of the EXM codes on Shoebox's list:

http://shbox.com/1/Dtcs.htm

Where does smoke come from "once hot"..... the tailpipes, the engine compartment or both? What is botched on the EGR delete? A leak at the EGR tube might allow enough air to enter the exhaust to set a lean code.

A scan log will tell you what the long term fuel corrections (BLM's) are doing. Seriously elevated BLM's often indicate exhaust leaks or misfires.

 

blue smoke out of the exhaust. the egr valve is on the manifold but the piping has been folded closed the valve on the back of the engine is plugged and the code is 44 Bank 1 (left) Oxygen Sensor (O2S) Circuit (lean exhaust indicated) and 63 Bank 2 (right) Oxygen Sensor (O2S) Circuit (open circuit). i also have recieved a 55 Fuel lean monitor. I got hose code off shoebox page. the ses light only comes on if im driving on the highway for a long period of time. the cam has been changed( not sure what type) but dont know if the car has been tuned.

 

Blue smoke generally means its burning oil.... nothing to do with the A/F control.

DTC 44 can result from a sensor wire burned against the exhaust, poor engine ground on pine D6 of the ECM, contaminated fuel, low fuel pressure, exhaust leaks before the O2 sensor.

DTC 55 sets after the ECM sees low voltage on the O2 sensor circuit when the ECM is in power enrichment mode (heavy throttle) for more than 8 seconds. Could indicate low fuel pressure, plugged fuel filter.

DTC 63 indicates a wiring problem to the right bank O2 sensor, preventing the ECM from going into closed loop.

Looks like you should check your fuel pressure, and go over the wiring for the O2 sensors very carefully.

And fix the ghetto-rigged EGR system. Either cap it correctly, or hook it all back up. In the 93's, a leak in the EGR system can also affect the O2 sensors, because on the passenger side of the engine, the EGR and AIR piping is combined in a single line, unlike all other years of the LT1.