Ques #1: what does the speed sensor actually do in my car? Can it make my speedometer quit working?

Ques #2:A buddy of mine at school just got an explorer intake and disnt drill the hole for the act sensor and just has it taped to the a/c line right beside the intake. My ques. is,is it gonna mess anything up on his car.BTW, he said that the cel light wasn't on

 

im not sure what the speed sensor actually does,but when i bought my new speedo cable,their wasnt anyway to hook it back up.it works fine though.

 

speed sensor will affect the idle/nuetral and idle/drive functions of the IAC

a bad sensor can make the car stall out when making abrupt changes in speed (decel) or free-revving

 

Doesnt the speed sensor also have something to do with the cruise conrtol as well? my 88 donor car didnt come with a speed sensor and it is non cruise control. I am adding one because my car is doing exactly what adder discribed above and because my mass air conversion instructions said to.

 

alright thanks adder so now what about ques #2.Anybody know?

 

Well it may cause drive ability issues. Here is some good info on ACT sensors http://www.fordfuelinjection.com/index.php?p=29 . He could drill and tap for it somewhere else if he wanted to. I have herd of people putting it in their inlet tube with a bung. Just tell him he needs to drill and tap for it in the intake, much easier: 3/8npt.

 

the ACT sensor is a source for spark retard control. if it is not reading the actual data from inside the tubes, it may cause your car to run more advance than you should be, and on a hot day, can cause pinging

 

ok then I'm gonna try to get him to drill the hole for it but it's a long shot,I tried to get him to do it before he put it on there

 

the speed sensor is the little plastic thing that plugs the cable into the tranny right? or am i wrong? idk

 

^^^yes your right