Thread: Fuel Pump Inertia Switch

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Ok, I was just looking thru the shop manual for my '94 Tempo when I came across instructions for resetting the inertia switch for the fuel pump. I know they shut down the fuel pump in an accident, I know certin people put them in street rods ect...

So I'd like to put 1 in the Falcon, I have an electric pump, so it'll work. I'v got the wiring diagram for 1 from a '94 Tempo so I'll get 1 for a '94 Tempo. But I want to drag race the Falcon, and I don't want the switch to trip from a quick acceleration, can this happen? also, how do I wire it? I have it getting power from a relay wired to the battery, relay signal comes from the solonoid "I" terminal. Where do I mount?

Mount it where ever you wish. The switch has a pendulum in it that shuts off in one direction only. Look at the schematics and see which way it needs to face. Personally I wonder why you have an urge to mount one, but it's not my project.

Think I'd probably just wire the fuel pressure switch through the oil pressure switch and leave the inertia switch for the Tempo.... No reason to start adding a lot of electrical stuff you don't need that can cause problems later....

Originally Posted by nitrowarrior

Mount it where ever you wish. The switch has a pendulum in it that shuts off in one direction only. Look at the schematics and see which way it needs to face. Personally I wonder why you have an urge to mount one, but it's not my project.

Just for Saftey, if it ends up on it's lid for whatever reason ( I hope it don't ) I don't want the motor to continue running ( could get re used ), or if a gas line broke, I bought a high GPH pump, it could empty the tank out pretty quick.

I bought the Tempo so I don't have to drive the Falcon in the winter ( and, it's not done yet ). so any Winter related accidents won't happen. but, I'll have it out of sight somewhere, probably in the trunk where Ford mounted them. this is, if I remember to get 1.

Originally Posted by Dave Severson

Think I'd probably just wire the fuel pressure switch through the oil pressure switch and leave the inertia switch for the Tempo.... No reason to start adding a lot of electrical stuff you don't need that can cause problems later....

That's an idea. if it was upside down, no oil preassure- no fuel pump. works the same way That's what I'll do... you posted while I was replying

Go with Dave's attitude. The inertia switch is forwrd spring wound. Upside down will not always trigger it.

I had a customer with a Tempo that every time she would drive over the speed bumps in her parking lot, the switch would kick off. I changed it to the pendulum style and solved the silly problem with that situation. Either switch is not anything I would consider running in the case of a racing situation where the sudden jolt of any kind could trigger it to shut off.

If the car is upside down the fuel pickup (and oil pump) will be sucking air ..............

Supposedly it takes a certain magnitude G-force to trigger either type. As with all electromechanical devices though caca can happen.

Kitz

Oil preassure switch it is. that is multi purpose..

yup.... one of our mechanics used to drive a tempo..... everyone would always purposely smack his car by the left tail light to trigger the switch..... after coming out to his car all the time and it not starting he got sick of it enough he bought a kia

LOL. this car would not have been my first choice but the guy was desperate for money, so he dropped his price to $500. no rust at all on the body, paint's ok, and it ran great, needed a cheap car. it's not a bad car, but I used to laugh at those who had Tempo's, now I own 1

get one from a newer ford like a tarus or something cause with slicks the one in my 86 stang would trip from time to time.