Speed sensor

[fparker]

I need to find out what pulse output speed sensor to use on my 1990 Burban,
I am running the TBI and ECM. The drive train is from a 1984- TH400 with 208 transfer case.
What does the stock 3/4 Ton 90 model use for driving the ECM? Can I buy one off of the shelf to plug into my speedometer gear in the transfer case?

 

[eagle mark]

You can program the VSS out of the chip and not use it on TBI!

AFI does sell a VSS to hook up to the speedometer drive. I do not know what the pulse is, if you must know call the shop and ask for Norm. But a chip would be cheaper than a VSS and you can get rid of other things as well with it.

 

[dyeager535]

This thread should answer all your questions.

 

[Thunder]

You can get a VSS from: turbocity.com They are at the bottom of the page.
Or get a chip programed as said above. So you can dump the torque convertor loc up and egr .Wont really need those with the swap.
Not sure if you can get a chip burned for less than $100
maby someone will give you a deal just to disable what you dont need.
Its not really hard to do.

 

[eagle mark]

Affordable Fuel Injection chips are $95.

Also look in the vendor section for a CK5 discount!

 

[dave_90_blazer]

the 90 has a DRAC, so to make your speedo work, you need to input 40 pulse per driveshaft revolution