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EVAP /ELCD purge valve Posted by TML [Email] ![]() ![]() ![]() |
I confirmed that the clicking I am hearing is the purge valve. It occurs basically all the time, accelerating, coasting, at idle. It stops for about a quarter of a second when you first step on the gas, either under load or in neutral.
I disconnected the electrical plug from the valve, and measured the signal going to it with a Fluke 867 graphical multimeter. Can anyone tell me if this is normal?
Minimum 7V, with pulses to 14V every 125ms (8Hz). The pulses are about 20ms in duration.
What seems strange to me is the constant 7V, and the fact that the pulses are there all the time (after the engine has warmed up). Any suggestions as to where the problem is originating are welcome. Right now my only ideas are 1)the valve not opening, which causes the ecu to continually try to open it, 2)it's supposed to do that, my valve is just really loud, or 3)the ECU is sending the signal in error.
posted by 24.71.223...
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