I made my own plug (you only use the lower 3 wires).

 

Please, tell me more?

 

GM Delco IAT sensor...works well..has fast response time and is easy to install...

 

Would like to know what MM did wih this left over part from the ford PROBE

 

Well, it was from an MX-3, but...

You still have the part you need attached to that "left over" part.

 

you didn't see anything funny there mm ?


anyway i cut out the part ok but the wireing has me beat so far ... can you help with that ....

 

Bingo. That is the part and that is the way it should look for installation. I'll get you some data on the wiring tomorrow, provided I don't get incarcerated following my court appearance in the morning for a speeding ticket I got a while back.
Maybe the Wickenburg Jail has WiFi.

Yes, I did see the humor in your remark.
However, having spent several years as part of the Probe community, it is my obligation to deflect the never-ending parade of ***** jokes that is part of the Ford Probed ownership experience.

 

common man - that is the most *****-ish looking car part i've ever seen . I cracked up when it fell out of the bit i cut up

 

Indeed. Probably could have hooked it up to a stepper motor and made someone really happy somewhere.

I still have another of those laying around in the garage. Hmm. Project...

 

/\ you know it has a variable resistor on the other end - im sure there is something that could be done with that - Must think !!!!

 

burn after reading style?

 

SERVO!

Exactly. But without the chair.

The "nipple" points into the flow.
That makes the other end the "back"
The three connections closest to the "back" are wired to the three IAT wires on the MAF harness.
I just don't remember off the top of my head what goes where.

 

/\ i hope you are wrong about that cause i cut the two "back" wires off my plug and assumed the three wires closest to the nipple were the ones to use

pretty sure the two back wires went to that variable resitor .....

I guess I'll have to wait till you get out of Jail - heh - hope the judge is feeling the xmas spirit and goes easy on you ....

 

Meh. I'll take a look tomorrow. You are probably right.

 

ok - i figured it all out . Contrary to popular myth , you need to cut the RED wire .
Red wire is 5v supply to temp sensor .
Then tap into (but don't cut black white and black green for your return and earth wires .

 

Did some logging this afrternoon with new temp sensor in place - seems to work well .
Possibly running richer although that could be the fuel trims adjusting to the new sensor location - not sure yet.


The sensor may not be fast enough to measure turbo heat surges . Either that or my intercooler is working well ....

ambient temp 23C - intake air at start of run 34C - end of run 36C

 

Can I please get a dumb guy DIY?

 

which bit do you need info on ? I'm not even 100% sure i got it right although everything seems to be working ok ....

 

Wires to cut and splice; mouting in the pipe etc.

 

I think MM may have wanted to do the diy - if not i'll do one and he can pull it to bits .......

 

"Want"? No. Obligated, maybe.

 

from another thread - if anyone needs it .

MM - What sort of temp rise are you seeing with your turbo after a run through the gears ?
I'm seeing about 13 deg. above ambient at end of run .

If i went way outside the efficiency curve of the turbo - do you think the sensor would be fast enough to see what was going on ?

 

Little to none. The outlet side of my intercooler is always at ambient temperature.
(Verified with a fast thermocouple and a laser thermo.)
Good IC, very good turbo.

Probably not. It is not the fastest sensor in the world.
The PCM is not expecting very fast temperature rises on that sensor.

 

Was about to do a DIY on this but started thinking about what was actually happening here and now I'm not so sure it is such a good idea .

MAF is calculated by the pcm by measuring air velocity and temperature at a set point in the intake .
Any point in the intake will have the same MAF (unless there s a leak somewhere) .
So : it stands to reason , if you measure velocity at one point and temp at a different point where the air is hotter - MAF will not be accurate .
End result will be leaner than ideal ixtures as temp goes up because pcm will compute a lower than actual MAF ........

 

isn't the IAT sensor in the maf?

There is no problem.