ACT sensor- who, what, when, why and where?

[Jmood]

First off, I bought this motor.....explorer intake, GTP heads, mustang 306 block, sc trim vortech. motor is in a 85gt, with a 86 harness, converted to mass air.....OK.

car barely runs when cold....(I think I have more than one problem)

the dude has mounted a sensor in the elbow just before the TB, I think its an ACT sensor. where is the plug for the act sensor in this harness? by the drivers side injector rail? (two pin connector, white(grey)/red and green/red)..... was there a place to mount this in the stock intake? I have had several 5.0's and don't ever remember messing with this sensor.......

 

[Flavadave4]

On a stock HO there is a threaded hole in one of the runners of the lower plenum for the ACT sensor, wonder why they would mount it elsewhere?

 

[Jmood]

was it in the runner by the #5 cylinder? I wander why there isn't a place on this explorer intake? does the colors sound right for that sensor? white/red, green/red?

 

[jrichker]

ACT colors
lt green/yellow, black/white

New AutoZone wiring diagrams

http://www.autozone.com/az/cds/en_us/0900823d/80/16/71/3c/0900823d8016713c/repairInfoPages.htm for 79-88 model Mustangs

http://www.autozone.com/az/cds/en_us/0900823d/80/19/59/5a/0900823d8019595a/repairInfoPages.htm for 89-93 model Mustangs

http://www.autozone.com/az/cds/en_us/0900823d/80/1d/db/3c/0900823d801ddb3c/repairInfoPages.htm for 94-98 model Mustangs

 

[RYC CUKR]

The explorer intake isn't factory drilled for the ACT sensor. There is a boss for it on the #5 cylinder runner but most likely it wasn't drilled and tapped by the person who built the engine.

 

[Jmood]

I found a good picture of another 5.0, it had the same colors going to the ACT, by the #5 intake runner/injector. I stripped the two wires/plug out of the injector harness and plugged it right up to the ACT sensor...... not real sure about the wires colors jrichker, but its the only two pin connector anywhere close to where the sensor was originally.

so just a heads up to anyone using an explorer intake...its not machined for a ACT sensor like in the stock Mustang 5.0 HO intake, you'll have to put it somewhere else. Mine is in the elbow just before the throttle body.

thanks for the replies......

 

[vristang]

http://www.freewebs.com/vristang/eecivfaqs.htm

 

[NIKwoaC]

I think it depends on the year of the Explorer the intake came off of, mine definitely had a hole drilled and tapped in the right place. Mine I believe was an earlier model.

 

[Mustang5L5]

SN95 mustangs and a lot of other modern cars have the sensor in the airbox. Doesn't hurt to put it there

 

[vristang]

Adaptive Strategy – This may be the most critical one for most daily driver Mustangs. Not allowing the Adaptive Control to function (because the ACT never sees 100F in the airbox), could hurt fuel economy and could cause drivability issues.