I am getting a CEL for low MAP sensor voltage. I have the HRC FCD. O also have a s-afc and I checked the map sensor voltage on the sensor check thing and it reads 3.78. Its the forst sensor on the s-afc from what I have been told. What is the MAP voltage supposed to be at. I talked to greg and his is at 4.5. But he lives in Minnesota which is a lot higher elevation than me. Would this affect it or should mine be higher than 3.78.

Update.....Well I found out from armond that the map sensor has to be at 4.5 volts. So I know mine is messed up. Looks like I am getting a new map sensor and a missing link this week. The fcd is going in the garbage. I hope this is the cause of my wierd idle that I am having.

Dave
05 Ford F150 SuperCrew FX4

Well I was thinking about this and I dont hink it can be the cause of my strange idle. Here are my reasons..
1. The map sensor was not bad at the time of the rebuild
2. I didnt get a CEL for the map sensor untill about 2 weeks after the rebuild.


Any thoughts on this guys?

Dave
05 Ford F150 SuperCrew FX4