intake air temp sensor

wdv · Mar 6th, 2003, 08:09 AM

I have found one of the wires going to my intake air temp sensor was cut. I have also seen this on my friends truck (both kae24). Is this harness inherently weak, or is this some dealer trick? I bought my one owner truck used, and all receipts indicate that it has been serviced by a Nissan dealership all it's life. I soldered the wire last night and it seems to be running fine this morning except at cold running where the idle cycled between 1000 and 1500 rpm for a few seconds.

Wilesy · Mar 6th, 2003, 08:40 AM

wdv,

You may find that it may have been cut deliberately by the dealer to address a particular issue.

Did your vehicle cycle between 1000 & 1500 before soldering the wire together? or has this just started. If so I would be cutting the wire, and mentioning it to the dealer you purchased it from and quiz them.

If it has been cut and your vehicle is running Ok, I would leave it alone.

Only my opinion.

Tolleyy · Mar 6th, 2003, 10:54 AM

No, it wasn't cut on purpose... the wires just come apart after time. I've gone thru 2 of them in 110,000 miles. If it's still idleing funny it might be still be getting a bad reading, maybe from the solder... who knows. I'd just replace it, it's only around $27.00.

jadcock · Mar 7th, 2003, 09:01 AM

Interesting...mine's broke also. The two wires just came off the sender when I was fiddling around in that area one night. The truck doesn't idle weird or anything, and the check engine light doesn't come on, but I think that's because the bulb is out. The check engine light doesn't come on when I start the vehicle either...it should light just for a few seconds, shouldn't it?

Tolleyy · Mar 7th, 2003, 10:50 AM

When mine went out, the check engine light would come on periodically, sometimes not even in the morning. And sometimes it idled wierd and sometimes it would run perfectly. Just had a mind of it's own I guess.

wdv · Mar 7th, 2003, 12:06 PM

Thank you all for your responses. After I soldered the wire back together and also doing a tune-up with new plugs, dist cap/rotor, timing set, the cold running has improved quite a bit. The rpm still hunts at cold running only, but at a smaller range and only for a few seconds, probably between 1200-1300 (instead of 1000-1500). After it warms up, the idle is rock steady at around 800. I've had a check engine light before but on a totally different problem (vss=no speedo), and sure enough, it was the only stored code (14)in the computer. There was none stored for the intake air temp.

JoanJetta · Mar 8th, 2003, 07:00 AM

very ironic. I posted about this in the past because I had an idle problem too. I had to go and find another connector to fix it. I haven't had any flucuations in idle (of course all of this occurred during the colder months). Now the truck idle fine. I suspect outside temp is a factor too.