Any more ideas?

I would check and re-check every vacuum hose for any potential leak.


Reference:

The O2 sensor produces a voltage based on oxygen content in the exhaust. The voltage varies between .1 and .9 Volts, .1 indicating lean and .9 indicating rich. The ECM constantly monitors this voltage while in closed loop to determine how much fuel to inject. If the ECM determines that the O2 sensor voltage was too low (less than .4 Volts) for too long (for more than 20 seconds (time varies with model)), this code is set.
Usually the cause of P0130 is a bad oxygen sensor, however this isn't always the case. If your o2 sensors haven't been replaced and they are old, it's a good bet that the sensor is the problem. But, It could be caused by any of the following:

*Water or corrosion in the connector
* Loose terminals in the connector
*Wiring burnt on exhaust components
*Open or short in the wiring due to rubbing on engine components
*Holes in exhaust allowing unmetered oxygen into exhaust system
*Unmetered vacuum leak at the engine
*Bad o2 sensor
*Bad PCM

__________________

1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible

MB Doc.....I meant to get online earlier and let you know, after some checking today I removed the sensor called the local foreign auto parts store that I purchased the sensor from and found out they sold me the wrong unit, they had the right one in stock and I installed it. It took care of the problem.......I hate to think I went to the trouble of checking so many things and taking so much time when I just needed to back track. Thanks alot guys