Engine coolant temp sensor

[bonnie&clyde]

Is this sensor necessary? The one that goes on the upper intake on a 93mustang, I'm having trouble installing the heater core tubes and was wondering if I even needed it

[marcs95gt]

Tha one for the temp guage no, thats the one on driver side. But the one by the water outlet, yes

[bonnie&clyde]

What's the purpose of it? Doesn't a tune help with the issue if that ain't there

[mk5.0]

What's the purpose of it? Doesn't a tune help with the issue if that ain't there

Just go to homo depot and get a reducer fitting and you can put the sensor in the intake without the heater tube.

[JV106]

It will not run right without it. The one on the passenger side in the heater tube is tied directly to the ecu. I know one of its main purposes is for cold start enrichment. Probably it's main purpose is emissions, probably there's folks who can tune around it. I dunno. I wouldn't get rid of it personally.

[bonnie&clyde]

Well I plan on using the heater tubes, but since I have bigger fuel lines the heater tubes won't fit there anymore so I'm trying to find a work around

[Broncojohnny]

Run hoses off the water pump straight to the heater core. Then, as mentioned above, go to home depot and get you a pipe thread reducer bushing and plug the sensor into the hole for the heater tube.

Without the sensor the computer will think the engine is cold all the time and it will run very rich.

[bonnie&clyde]

Run hoses off the water pump straight to the heater core. Then, as mentioned above, go to home depot and get you a pipe thread reducer bushing and plug the sensor into the hole for the heater tube.

Without the sensor the computer will think the engine is cold all the time and it will run very rich.

its been a while since I had it hooked up properly but the heater core has 2 hoses, I know 1 can go straight to the water pump but what about the other one?

[mk5.0]

its been a while since I had it hooked up properly but the heater core has 2 hoses, I know 1 can go straight to the water pump but what about the other one?

The other will need to go to the intake. So you will need a T-fitting at that sensor or put in the back fitting on intake.