ECT/ACT location...4.9L

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Dec 2, 2010 | 05:24 PM

Jeremy DeMedeiros

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ECT/ACT location...4.9L

I have looked, and looked, and looked, but for the life of me i cannot find the ECT sensor location.....

i have found ACT (Upper intake behind Alternator Kinda)

But i have found what i THINK is the ECT, but there is no wire going to it, just a rubber hose going into cab???? is that is next to TSTAT? it does not seem liek a sensor... and the plug i have no idea what it is for, it ran fine without it for 4 days....

Dec 2, 2010 | 06:05 PM

Jeremy DeMedeiros

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Is that the pluggin for ECT? if so, i cannot find where it goes, it ran fine without it i beleive...

Dec 3, 2010 | 10:45 AM

Jeremy DeMedeiros

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can someone please expain why my sensor is not in the same location as ALL of the other engines :S maybe mine doesnt have one? old owner took it out? but then it wouldnt run good at all eh? im confused on what to do, should i go buy a new peice for it? what would be the name of the peice to buy? any help appreciated...

Dec 5, 2010 | 12:26 AM

mcpaul05

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From: Del City,OK

that is the connector and where that hose is at is where the sensor should be. i would order a new thermostat housing and sensor. your truck will run alot better and get better gas mileage once it can tell its up to operating temps. right now your computer is most likely seeing that its still in Cold warm up mode which will make it run rich. hope this helps

Dec 6, 2010 | 09:45 AM

jas88

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From: Greater Austin, Texas

ECT = Engine Coolant Temperature
ACT = Air Charge Temperature

ACT is for mass air trucks only, isn't it?

Dec 6, 2010 | 10:22 AM

mcpaul05

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From: Del City,OK

ACT is on Speed Density trucks. its on the Number one cylinder intake runner on the lower manifold.

Sep 21, 2011 | 05:04 PM

rlwilson2

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From: Nevada

I know I am reaching deep but I just found this post and it exactly explains my problem with my 92 4.9... Previous owner deleted the etc sensor tube and truck floods at start up occasionally, smells rich, and poor gas mileage 12 mpg.
Original poster did not update but I will after I locate a t-stat housing and reset system ... Hope this helps someone else down the road!