ECT question

USAF91GT · Jun 8, 2006

Alright, never really thought of this until now.

I installed some Autometer gauges a few weeks back and pulled the ECT sensor and put the autometer sender in its place, according to the destructions. Now, the ECT sends parameters to the computer correct? Is this going to cause problems? Just wondering what everyone else did. I know a lot of you have Autometers, but never heard of anything as far as relocating the sensor.
I didnt notice any driveability problems, but it seemed to use up some gas, although, I was away for 7 months, and I could not keep my foot out of her!

Wish I could do something about it now, but I am back in Korea after a month back in the states. 4 more months!!

jrichker · Jun 8, 2006

Ditch the Autometer and put the ECT back where it belongs. The computer uses the ECT sensor data to help set the A/F ratio. If the A/F ratio is off, it will mess up gas mileage, performance and make the car hard to start when it is warm.

The stock coolant temp sensor screws into the driver's side front of the lower intake manifold. It has 1 wire on it. Remove that sender ant put your Autometer gauge sender there. You may have to drill & tap a hole up near the theromstat housing if you want to use both stock & Autometer gauges.

Here's a book that will get you started with how the Ford electronic engine control or "computer" works.

Ford Fuel Injection & Electronic Engine Control 1988-1993 by Charles Probst :ISBN 0-8376-0301-3.

It's about $20 from Borders.com see http://www.amazon.com/ . Select boo...very good, and I found it to be very helpful.

USAF91GT · Jun 8, 2006

whoops! Guess I will fix it in October, didnt really think this one through. Thanks for the help!

HISSIN50 · Jun 8, 2006

You can also use a cast t-stat housing (10 bucks at the parts house) or chrome FRPP housing (25 bucks online) if you need a t-stat housing with a pretapped boss [for the stock sender]. Both housings have their issues (the former rusts and the latter tends to leak). I went with the former and painted it - no biggie and the stock sender fits the boss.

Just another option if you dont have Jrichker's tapping skills or are kinda lazy like me. Good luck.l

jgfiveoh · Jun 8, 2006

just a thought but did you removed the ECT sensor from the heater tubes or the temperature sending unit on the drivers side front of the lower intake? and the latter should work ok as long as you don't mind your stock guage not reading. i asked because the ECT is on the passengers side of the engine, contrary to what jrichker told you.

vristang · Jun 8, 2006

I think the question posed by jgfiveoh is pretty relevant.

Which sensor was removed?
Often people don't realize that there are 2 coolant temp sensors on the Mustang. One for the EEC, and the other goes to the dash gauge. If you pulled the drivers side sensor then you are good to go, as this is the dash gauge sensor.
If you pulled the passenger side sensor that is mounted in the heater tube, then you need to make some changes, as the EEC is no longer getting coolant temp input.

my thoughts
jason

HISSIN50 · Jun 8, 2006

jgfiveoh said:
i asked because the ECT is on the passengers side of the engine, contrary to what jrichker told you.

I dont see where JR wrote anything incorrectly.

One thing that helps so much is using the correct terminologicaliciousness. The temperature gauge uses a temperature sender and the ECT is a sensor.

jrichker · Jun 8, 2006

jgfiveoh said:
just a thought but did you removed the ECT sensor from the heater tubes or the temperature sending unit on the drivers side front of the lower intake? and the latter should work ok as long as you don't mind your stock guage not reading. i asked because the ECT is on the passengers side of the engine, contrary to what jrichker told you.

That isn't what i said...

jrichker said:
Ditch the Autometer and put the ECT back where it belongs. The computer uses the ECT sensor data to help set the A/F ratio. If the A/F ratio is off, it will mess up gas mileage, performance and make the car hard to start when it is warm.

The stock coolant temp sensor screws into the driver's side front of the lower intake manifold. It has 1 wire on it. Remove that sender ant put your Autometer gauge sender there. You may have to drill & tap a hole up near the theromstat housing if you want to use both stock & Autometer gauges.

Get your facts right next time...

302RollinHard · Jun 8, 2006

jgfiveoh =
All Hail jrichker

USAF91GT · Jun 8, 2006

Yeah, I took out the wrong sensor. Didnt even dawn on me as to why my stock gauge was still working. I could care less if the stock gauge still works. I am an idiot! Thanks for the help once again.

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