Electrical what speed sensor eletrical wire is for?

Jean-Marie GT · May 11, 2022

hi . i have a 89 5.0 with no mass air flow sensor
t5 and the electrical wire of my speed sensor is cut ,
what is the purpose of these wire?
ty

manicmechanic007 · May 11, 2022

It should be only for the speedo and cruise control in 1989
It was later I believe that they used it for the trans
I have a schematic, not sure where all the wires go
I will look

manicmechanic007 · May 11, 2022

It is only the electronic engine control and the cruise control
Looks like your 89 has a speedo cable for the speedometer

manicmechanic007 · May 11, 2022

General karthief · May 11, 2022

1989 was the first year for 50 state mas air, if it's not there you may have other problems, you sure this is an original V8 car?
I know you said it is a GT but that stuff can be added, look behind the passenger kick panel, what computer is it?
What else is hacked on this car?

Jean-Marie GT · May 11, 2022

not sure if it the factory engine i will look the computer tomorrow. bought the car last years and he run great but there little thing i try to understand like why there no mass air flow and why the vss wire are cut

Jean-Marie GT · May 11, 2022

The vss look new.
How can i know the years of the engine?
Maybe its a 88 engine ?

General karthief · May 11, 2022

The engine is not the important part, it will be the wiring, computer and stuff like that.

Jean-Marie GT · May 11, 2022

But if There is supposed to have a mass air flow . Why the engine run great.

General karthief · May 11, 2022

I don't know how it's set up

Jean-Marie GT · May 12, 2022

What happen when you disconnect your maf

General karthief · May 12, 2022

Stumbles around like a drunk and dies

Jean-Marie GT · May 12, 2022

Wow ok .i Will check what ecu is installés. Maybe we Will know why i dont need maf

Mustang5L5 · May 12, 2022

manicmechanic007 said:
It should be only for the speedo and cruise control in 1989
It was later I believe that they used it for the trans
I have a schematic, not sure where all the wires go
I will look

It was only used for cruise for 86-88 on the speed density ECU's

For 89-93, the ECU does monitor the VSS. On the wiring diagram you posed you can see wire 150 and 563 go to the ECU. Usually when the VSS is bad or disconnected on these models, the car will stall when coming to a stop or hand an idle surge when slowing.

Jean-Marie GT · May 12, 2022

Ok so no map,vss wire is Cut and engine run great , i Will probably find a pre 89 ecu

Mustang5L5 · May 12, 2022

Jean-Marie GT said:
Ok so no map,vss wire is Cut and engine run great , i Will probably find a pre 89 ecu

You should really identify what you have first. Can you take some pics? What's the build date on the door sticker?

The wiring is different between speed density and mass air, so you cant simply just swap the ecus.

Jean-Marie GT · May 12, 2022

Yes.i Will after work

Jean-Marie GT · May 12, 2022

There is no sticker

Mustang5L5 · May 12, 2022

Can you provide the VIN number? Don’t need the entire thing. Leave off the last 6 numbers.

Pics of the engine bay will help too.

Jean-Marie GT · May 12, 2022

262367.got the pic of the ecu

Electrical what speed sensor eletrical wire is for?

Jean-Marie GT

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manicmechanic007

manicmechanic007

manicmechanic007

General karthief

wonder how much it would cost to ship you a pair

Jean-Marie GT

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Jean-Marie GT

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General karthief

wonder how much it would cost to ship you a pair

Jean-Marie GT

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General karthief

wonder how much it would cost to ship you a pair

Jean-Marie GT

Member

General karthief

wonder how much it would cost to ship you a pair

Jean-Marie GT

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Mustang5L5

That is…until I whipped out my Bissell

Jean-Marie GT

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Mustang5L5

That is…until I whipped out my Bissell

Jean-Marie GT

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Jean-Marie GT

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Mustang5L5

That is…until I whipped out my Bissell

Jean-Marie GT

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Electrical what speed sensor eletrical wire is for?

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wonder how much it would cost to ship you a pair

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wonder how much it would cost to ship you a pair

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wonder how much it would cost to ship you a pair

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wonder how much it would cost to ship you a pair

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That is…until I whipped out my Bissell

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That is…until I whipped out my Bissell

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That is…until I whipped out my Bissell

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