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I bought the haynes book and did the test for the dpfe sensor it stayed the same it changed about 0.3. It start at 0.96 and went to 1.30 this is not right. I even took it down the highway to get the temp. way up then brought it back and tested it again same reading 1.26 to 1.30. It did not increase to 5.0 like the book said. Plus there was no vacuum that I could feel out of the line that opens the egr valve. I can manually move the valve with some hose and man power, but I could not stall the van. It would hesitate while doing it that is all. I got the right reading on the ref. side of the dpfe but not the sig. side. Could this cause the van to idle rough and miss on #6. Also when I take the neg. off for a few min. and replace it the cel is off and the engine idiles perfect no lopes. Engine sits smooth???? But when the cel comes on after a few days the engine starts running rough???? This has me puzzled I know it is a sensor that is doing it but which one. I also changed all the plug wires. I checked the tps it is working fine according to the tests in the book. I also checked the coil pack since I had everything off and found the front two (4,3) have a reading of 13.5 approx. and the next two (6,2)13.1. I don't think they are suppose to be different. Maybe I am getting a week spark on 5 and 6, 6 being the worst. I have a new coil pack coming in. I know this is long but I am puzzled and it may help other winnie owners. PLEASE HELP
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