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Eric, can you point me in the right direction as to how to get started diagnosing mechanical timing issues? Thanks!
Alright, so I got a new DVOM and set out to test the MAP sensor per the link provided by college man. MAP is getting 4.7V from PCM (wire 1). Without vacuum the 2nd wire (signal back to PCM) was .05V and when I applied vacuum there was absolutely no change in the voltage. According to the service manual this wire with MAP with no vacuum pressure should read at .5V. I checked the ground wire (#3) to positive battery terminal, my reading was just over 6V, not 12V as indicated in the link. Is it safe to say that I need to replace the MAP sensor?
Eric, should I start looking into timing issues like you suggested as well to be safe? I’m not very familiar with this territory, any suggestions on where to start?
Thanks guys.
Alright, so I got a new DVOM and set out to test the MAP sensor per the link provided by college man. MAP is getting 4.7V from PCM (wire 1). Without vacuum the 2nd wire (signal back to PCM) was .05V and when I applied vacuum there was absolutely no change in the voltage. According to the service manual this wire with MAP with no vacuum pressure should read at .5V. I checked the ground wire (#3) to positive battery terminal, my reading was just over 6V, not 12V as indicated in the link. Is it safe to say that I need to replace the MAP sensor?
Eric, should I start looking into timing issues like you suggested as well to be safe? I’m not very familiar with this territory, any suggestions on where to start?
Thanks guys.