93_jdm_fd

iTrader: (1)

I just bought and 87 non-turbo and am having some starting issues. I bought it as a non running car so it's not a huge surprize. Anyway the owner says it has a manual choke button that was added for easier starts when it's cold out(like the winters here in Edmonton).

Anyway I have never heard of this choke before on a fuel injected vehicle so i have no clue if it's on or off. Does anyone else have one of these on there car and could tell me how it works?

All I am doing is floading the engine. It wants to start but the plugs get soaked in fuel!!!! Please shed some light on this manual choke or even electronic? I don't know. I have a toggle switch right beside the security switch. So it's electric with either vaccum or a wire to control it.

clokker

iTrader: (2)

There is no manual choke.
The PO has almost certainly wired in a fuel pump cutoff switch so the pump can be killed while starting.

arghx

iTrader: (3)

you can't "choke" a fuel injected engine. A choke is an additional restriction in the intake tract to create more vacuum, which will draw more fuel out of a float bowl.

RTRx7

iTrader: (2)

If you're engine is flooding repeatedly, you might have an injector problem.

93_jdm_fd

iTrader: (1)

Yeah it impossible to have a choke on a fuel injected engine but that what the owner called it. It must be wired into the fuel system some how. He said they did it at the dealer and they have done alot of them for this climate.

He said it opens the throttle plate more to allow more air flow to compensate for the fuel when cranking it in minus 30 weather. Anyway the guy probably told me some bullshit but another guy i talked to said he had one in his FC that the dealer installed.

I just maybe someone else has one. It looks like a factory install. The switch matches all the other switches.

Here is a picture of the switch. it's right beside the security switch..

clokker

iTrader: (2)

T'aint no "factory" switch.
It's relatively simple to find switches that match semi-well with real Mazda switchgear and that's what whoever installed that did.
At least be thankful they didn't just slam a Radio Shack POS switch in there.

You can confirm this (mostly unbelievable) story from the seller by looking at the throttle body.
The only electrical device that's there stock is the TPS. If this "choke" story is correct, there must be some sort of solenoid attached to the throttle plate shaft that would **** it open during switch activation.
I doubt you'll find any such device.

Dollars to donuts it's just a fuel pump cutoff switch.
You could confirm this easily.
Start the car, let it warm up till it's idling properly.
Now, turn that switch OFF (or ON, depending on how it's wired up) and see if the car doesn't die quickly.

Does it?

BTW, I used to live in Edmonton, lo these many years ago.
Right off the Whitemud Pkwy, IIRC.
Worked for the Research Council of Alberta on pipeline stuff.

I does get pretty ****** cold up there...

93_jdm_fd

iTrader: (1)

Yeah i haven't picked the car up set. I have to tow it out of there. I was hoping to just get it running there but i quess not.

I will check it out better when i can take some time and look under the hood.

Evil Aviator

1. Open the hood.
2. Remove the cover (if it is still there) from the fuse block near the left front strut tower.
3. Remove the EGI INJ fuse (probably green)
4. Get back in the car and crank the starter for about 3-5 seconds.
5. Reinstall the fuse and cover, close the hood.
6. Now try starting the car. If it doesn't start within 5 seconds, then flip that "choke" switch to its opposite position and try starting again.

RTRx7

iTrader: (2)

It should be able to start if you get it unflooded but I guess towing would be the easier/more expensive way.

93_jdm_fd

iTrader: (1)

I pick it up tuesday so maybe i'll try pulling the relay and defload it. I'll try it with the switch either on or off. It should start. I haven't really tried it to much cause i got the car cheap because it did run when he parked it and then after a few months of sitting it just rolls over.

I almost got it running by just pushing the gas pedal to the floor but the car deal wasen't complete yet. So i didn't want to try to much, lol.

Evil Aviator

No wonder it is flooded. The gas pedal deflood feature wasn't added until 1989. All you did was make it way worse, lol.

93_jdm_fd

iTrader: (1)

Really, i didn't know that.. I know when you do a compression check, you unplug the CAS and both trailing plugs and hold the pedal to the floor and crank it.

I remember reading somewhere that you hold it to the floor when cranking it to let more air in with the fuel. I will stop doing that on this car. I will post up on tuesday if i get it running.

Evil Aviator

Yes, that is the correct procedure for checking the compression of the engine.