Found out what the vacuum sensor assembly was, just a MAPP sensor. Does not give an failure code on the ECM. Book explains how to test, but want to make sure the values for the test are acurate. Initial test shows 3.5V and with 25 inHG it gives a reading of 1.5V. The manual indicates it should be approximately 0.5V. What does approximately mean and is 1.5V close enough or is that an indicator of MAPP sensor failure. Can't find spare parts at salvage yards to compare and the new one that I ordered is quite expensive ($250 U.S.). It would be nice to find out it someone is an expert on this sensor to make sure it is bad.
- posted
16 years ago