will the coolant sensor mess with the fuel injection??/

[thebigunderscoree]

will the collant sensor keep the fuel injector from working?? that is what i have read in the haynes repair manual but i am not sure

[Black Lotus]

If it is the coolant temp sensor for the ECM, yes, it'll screw it up mightily!
If it is the temp sensor for the gage, it doesn't matter.

[thebigunderscoree]

thanks for posting that but it is the one for the ecm but not having it connected can that keep it from working all together?

[fierojoe]

The injector will still fire without the CTS plugged in. Is you problem with an injector not firing or a CTS going bad? If it is with the injector, make sure you are getting battery voltage to the injectors. The injector is always hot, and the negative is switched in the ECM, so you should have 12v on one of the pins at the injector connector. If you don't, you probably have a bad fusible link. If so, the next logical place is to check the ignition module. The ECM gets the engine timing off of the ignition module, and if it's not getting that pulse, the injector will never fire.

Lucas Cowgar
http://www.fierojoe.com/

[fierojoe]

I just read your other thread about the injector not firing. A bad ground on the ECM could cause the injector not to fire. On the wiring harness, there should be 2 eyelet connectors that come out of the wiring harness somewhere around the back of the motor, right by the front side of the tranny. Make sure those are hooked up, they are the main grounds for your ECM. They should be bolted directly to the studs that hold the tranny to the block. Also, there should be a ground strap connected from the front right head stud (firewall side of to the right of #1) to one of the deck lid hinge studs on the firewall. This is your main chassis ground. If this is not hooked up or is in bad shape, many strange things can happen.

If you grounded one side of the injector and got a ton of gas through it, my diagnosis path would be a bad ECM ground, bad chassis ground, bad wire to the from the neg injector to the ECM, and finally the ECM.

[thebigunderscoree]

thanks for your help fiero joe and you have a great website by the way