Will a RX-7 still start if it has a bad water thermo switch? I am getting that code out of the ECU, and the car doesn't want to start. Thanks

 

maybe, the ecu will either think its -32c outside and flood the engine, or it will assume its 80c, and not give you enough to start it



mike

 

I have the same water thermo sensor problem right now (on my 88 Turbo II). Error code says water thermo sensor. When I figure out what it is, I'll let you know.

 

its either the thermoswitch, ecu or wiring in between



mike

 

yeah I think it might be my computer, becasue when I opened my computer up it looked like it had a burnt curciut in it.

 

My concern would be if the ecu is bad. What are my options w/ the stock ecu? Open it up and resolder it? Purchase another one from a seller and hope that it is good?

 

i got mine replaced ($50) and no difference whatsoever.....another grimlin

 

You check if the thermo switch is good with a ohm meter, I can give you the specifics if you want, just got to get the factory book out of my car, maybe j9f3s has it handy?

 

at 68f it should be 2-3 k ohms

and at 180f it should be .1-.6 k ohms

i used to put them in water, and slowly boil it. the sensors usually get slow and "cold" over time. the ecu is looking 1 for an open circuit, and 2 to see if its out of range.

so if the sensor tests close, that might not be enough to trigger a code.

you are also looking for loose/ inermittant connections



mike

 

I left mine unpluged once and it wouldn't start.