1993Saturn
Well-Known Member
- Joined
- November 21, 2008
- Messages
- 160
- Reaction score
- 5
- City, State
- Redmond, OR
- Year, Model & Trim Level
- 94 4x4
93, 99 Bauer 4x4
I was thinking about replacing the DPFE unit just because it has been there for at least 10 years. I want to catch it before it goes bad. I try to catch things before they happen, not after (although I haven't been doing so well in that area recently). The Haynes on 6-26 #19 "Backprobe the SIG and GND...therefore the voltage should be approximately 0.75 - 1.25 volts (black plastic housing type) or 0.34 - 0.8 volts (aluminum housing type). As the engine starts to warm and EGR is signaled by the computer, voltage values should increase to approximately 4.0 - 6.0 volts." This shows conflicting information that can be sent to the computer by each of the 2 different DPFE types. If each type starts out producing different voltages, how can the computer respond correctly to the black plastic unit when it was set for the original aluminum voltage output. So, is this a problem when changing types of DPFEs?