Somehow I need to get a speed sensor on my toyota transfer case. Just called a speedo shop and he said he has some pulse senders but needs to know the pulses per revolution and he can set me up. The stocker has a gear thing on the end, which can come off but I don't think it will work with the toy tcase.

The engine is a CA mustang HO 302, so it is a Mass Air engine.

THANKS!!

800 pulses per minute. or was it per mile. i got an aftermarket Speed sensor for my mass air 5.0 and it has 800 per minute and works great. no more stalling and stuff.

per minute? how does that translate? It is supposed to send out pulses based on speed right? He said like 2/4/8/30/60?

the speed sensor on mass air obdII only senses that the vehicle is moving. if the driveshaft is turning it sends a signal to the ecu which in turn keeps the fuel pump running. on later versions it sends actual speed information to the ecu which tells the speedometer what to read and other stuff more complax that i ever want to understand.
my setup uses a 89 mass air computer and the sensor i installed has 800 pulses per minute and works just fine.

Brandon this is where i got my sensor from. i could not use the OEM ford as it would not go into the transfer case from the scout dana 20. it had a different mount arrangement so i used the one from a GM with the hard coupler..... this worked with my stock speedo cable from the jeep.

Hip,

Isn't it 8000 pulses per mile ??

opps forgot the linc....

http://www.classicinstruments.net/senders.htm

and yes after re-reading the info it delivers 8 pulse per revolution about 8000 pulse per mile. but basically all the ecu needs is to sense the signal. it dont really care how fast the vehicle is moving just that it is moving thus maintaining the signal thus maintaining power to the fuel pumps.

speed sensors are rated in pulses per revalution.
i have 4, 6, 8, 12, and 16 ppr in stock
email me : brianp@rbsauto.com

Originally posted by hip
it dont really care how fast the vehicle is moving just that it is moving thus maintaining the signal thus maintaining power to the fuel pumps.

so, you are saying that if your not moving, the fuel pump doesnt work?

the ecu (computer) controls the fuel pump relay. the ecu recieves signals from many sources at different times. when you turn the key on to "run" the ecu senses this and turns the fuel pump on for 1 second (to repressurize the system from any bleed down). when you turn the key to "crank" the ecu senses this and turns the fuel pumps on as long as the key is in the "crank" position. when the engine starts the tpi (distributer above 700 rpms) sends a signal to the ECU and the ECU keeps the fuel pumps running. when you come to a stop sign and you idle down if the engine rpms drop below 700 rpm all signals to the ecu stop so the ecu turns off the fuel pumps. this is where the Speed Sensor comes into play. when engine RPM drops below 700 rpm but the vehicle is sensing motion (speed sensor signal to the ECU) it keeps the fuel pumps running. this is especially important when compression braking. you dont want the engine to die every time you drop rpm below 700. i crawl over stuff and sometime im idling down as far as 300 rpm, i still want the engine to be running.

i may be wrong, but i dont remember it ever requiring any speed signal to keep the pump running (of course those 140 mph passes might have been wrong) i belive once it recives a signal from the dist it keeps the pumps on...

the tpi only sends a signal when above 700 rpm. as per the ford fuel injection bible. most efi applications dont ever get below 700 rpm. rockcrawling we do all the time. i know about half the time i came to a stopsign using my gears to slow the vehicle down if i did not depress the clutch while still above 700 rpm it would die. it would always start right up but was very frustrating. i installed the speed sensor and it eliminated this problem. now i am no efi guru but this is what i read and found to work for my application.

8, k thank :)

BTW my truck runs great without but it is smog time :)

Originally posted by T1H5_TA3
speed sensors are rated in pulses per revalution.
i have 4, 6, 8, 12, and 16 ppr in stock
email me : brianp@rbsauto.com

got one that will plug into a toyota transfer case on one side and allow a standard cable (american, to my autometer speedo) on the other side? :)