I have a 87 Cherokee 4.0. Intake air temp sensor shows its open with ohm meter. Its part # 53004971. Dealer says no longer supported, after market stores same story. Any ideas. Thank you

 

Hit the JY is all I have. Did you try Napa? Btw as an experiment I swapped in a 225 ohm resistor in mine. (like 6 months ago) Now my ECU always thinks the air is warm. I'm not recommending that, but I didn't like the readings I got from mine so I gave it a shot, seems to work fine. Might be in sub freezing or sub zero I might have trouble, Idk.

If you click on that link in my sig, right on top is a link to Cruisers tips. You might want to take a look. (I bet your c-101 is grungy!)

 

Thanks, if you put any money on your bet you lost. I called napa and all parts stores here.

 

Bet? Anyway, JY, (Junk Yard) idem then.

Edit. Oh! the C101...Cool. Guess allot of 87-88 owners don't even know they have one.

 

(I bet your c-101 is grungy!).. I read and aplied Cruiser's tips.

 

Too funny.. I was posting my edit at 6:18 as you responded at 6:19. (sort of low odds there). Anyway I looked on Rockauto. Skunked there as well.

Btw, mine, it seemed maybe the copper wire flexed too much and broke right where it comes out of the sensor. (hence erratic readings), If I cared I might chop it right there and see if I could solder on to the stubs. Yours being "open" would be consistent with that. Mine feels wrong.

 

I was trying to be funny I'm glad you took it that way. I'll go get a used one tomorrow. I think also a latter year might work, the connections will be wrong but I think that won't be too hard to change. Thanks again

 

All's well. Was saying...see the time on my edit on post #4? I got up from a nap and started typing at about the exact same time you were. Nutty coincidence!

Anyway Cruiser and others know the NPT pipe thread size. Without even looking I agree the resistance "curve should be the same. I doubt it's even polarity sensitive. They often mount it somewhere else, in plastic even. You can plug where it was or even run that to your MAP, and eliminate the old tube.

If I thought it really did much I'd leave it in the intake.....seems to bonehead me, it is a pretty minor player. The MAP, TPS, ECT & 02 sensors are runnen the show. I'm suspicious it acts as a "cold enrichment" of old, or a choke of older. But I really don't know. If that were true, your mileage with the IAT always fully open, (open circuit, no resistance), might never clear 16, even on the freeway.

 

No longer available. Junkyard. They rarely fail.

 

Cruiser54, Thank you for all your work. That's an impressive piece of work, Ed

 

You bet. Enjoy your Renix Jeep!!

 

Is this the right part?

Wells SU109 Intake Manifold Temperature Sensor

Saw it on amazon.com

 

It might work, the connection is different. Mine has a wire pigtail on it. I'll save the part number just in case I run out of options. Thank you

 

Update, I figured out I wasn't using the ohm meter right. It isn't open but at 200 degrees its reading 1400 ohms high a chart I have says at 212 degrees I should see 185 ohms. So I made a test plug with a 200 ohm resistor. My high speed backfire is gone (it acts like it leans out at freeway speed). If I remove the resistor and plug the iat back in the backfire comes back. I can also put tranny in low and at 3100 rpm the backfire is there and goes away with the resistor. I'll see what happens with a cold start with the resistor in, in the morning.

 

If you're really thrifty, you could buy three resistors and hook them up with a multi-position switch to give you the three most common temperatures for where you live: Maybe 25,000 for winter, 5000 for spring/fall and 1500 for summer!
But really, get one from a junk yard-They don't usually go bad.