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My 1990 obs sensor has the exact same 2 wire connector that my 2003 5.3 has. Can I just use the 5.3 sensor and have my temp guage work properly or do I need the adapter?? I ordered p/n 182-2277 adapter from speedway motors but it has a 1/8 female end and my obs sensor has very large male threads, I'd say maybe 3/8ths. Any adapter to accept my obs sensor would seem to have to be very large???? I'm stumped. Thanks.
Do like the other guy that posted yesterday, go buy a 1/8"NPT to 3/8" NPT adapter. Issue done. Use your old sensor since the resistance values in sensors change over the year models.
I just drilled and tapped the water pump.
Thanks for the input guys, but I'm still confused as my obs sensor has gigundo threads,much larger than the oil sensor.I don't know if anyone has done this but I could drill and tap the original location in the head,but the heads are already on and I don't want to botch it up. I'll check around for other adapters though. Thanks again.
You ordered the adapter for oil pressure sensor.Check out this thread he shows the adapters with part #'s http://www.ls1truck.com/forums/lsx-t...ed-swap-3.html
You have the 3/8 sensor just like me.
FYI you need the temp sensor for the 5.3 motor for the computer to work properly.That is why people use there original temp sensor in the other head port for there gauge.
I didn't know you needed the ls temp sensor I thought that was only if you were running e fans.
Ect signal is a huge input used for fueling. Gotta have it. A temp sender is different than a temp sensor. You need a sensor for the pcm and a sender for the guages.
Street and Performance sells the exact adaptor you need. Metric to 3/8 pipe thread. Only thing that sucks is that they're polished. Yuck! Lol
Thanks Gagliano7 for the info, I didn't know that the original sensor was needed for the computer to work correctly. I'll leave the 5.3 sensor in the drivers side head and run my obs sensor or a mechanical water temp guage off the rear of the pass head. Live and learn!
:sigh:Quote:
Originally Posted by vortecyota
i dont even know where the pigtail is on the harness..smh..anyonehave an extra one? also what pin does it go into the pcm?
No problem i learned about the temp sensor from looking at threads on this forum.Quote:
Originally Posted by exboatracer
u can bye this temp sensor from Orelly's part # 12551708
i have the sensor already i just had to order a replacement pigtail from ebay. should be here today. gotta figure out what pins it connects to the pcm.Quote:
Originally Posted by blackice402
its a three wire sensor two for the computer and one for the gauge i have one in my truck just remove old and install
you can get it from a junk yard off the overflow or any of the three wire with the purple seal
the ones side by side go to pcm other one goes to gauge
well i have the single wire one from the old engine which im going to put on rear of the passenger side head then the 5.3 sensor will go in the front of the driver side head. the 5.3 is a 2wire plug.
Check out this temp sensor setup http://www.ebay.com/itm/LS1-LS2-LS6-...09477265333595 I think i am going to change to this because the location of the adapter and old temp sensor in the back of the passenger side head is the way of my spark plug wire and very close to the shoenfeld headers.Also makes changing that back spark plug a real pain.
that's what i'm using & it works great.
I'm still trying to figure out how to turn my coolant light off after terminating the stock reservoir and connector..
Ok guys after doing the 3 wire camaro sensor and pigtail, my guage still don't work.
I now have the adapter and got a new 95 sender but it is two wire. Is this correct? I know just one green wire goes ti the guage but what wire on the sender is it? I don't have my stock sensors to plugs anymore.
Not sure about the 95 but my 92 was a single green wire sensor was only one wire. The 3 wire camaro sensor worked perfect for me. Did you wire it correctly? Check out this thread. http://www.ls1truck.com/forums/lsx-t...or-wiring.html
Yes I had it wired just like that. I have a extra wire in my psi harness that is for the 3wire sensor. Maybe I should've ram my own wire from plug to green guage wire.
Anyway I found in pics of my old motor was the temp sensor by the upper water neck had a 2 wire plug with one yellow and one black wire. I haven't traced it further just yet.
I ended by drill the water pump and tap it with a 3/8 NPT.
http://img835.imageshack.us/img835/915/img1336qv.jpg
http://i18.photobucket.com/albums/b1...-27-54_135.jpg
http://i18.photobucket.com/albums/b1...-27-49_692.jpg
i found thsee pics from what i took a while ago. this is the "sensor" which goes to the pcm and yes your right that it is next to the water neck and has a yellow and a black wire. this IS NOT used for your gauges. i may be misunderstanding what your asking but you shouldnt need this sensor on your new motor as it should already have one. you will need the "sender" which has a single dark green wire going to the connector and the sender itself only has one pin on it even though it looks like its made for a two pin. the sender is what goes to the gauge and it is located on block on the driver side of your old 350. you will need to retain that sensor or buy a replacement if yours isnt working/lost it, utilizing a metric to american adapter. 12mm x 1.5 to 3/8 NPT. idk how your psi harness is wired but i reworked my own and i traced the dk green from the gauge to confirm i had the correct wire. hope thats what you were asking...
btw, i dont have any pics of my SENDER or connector for it off hand otherwise i would post it so you know what you should be looking for. sorry. maybe somone else has some.
Yes I need to install the factory sender for the gauge in the pass side head. I got the metric to 3/8 adapter. I just can't seen to find a sender or connector. This Should be at autozone or orilleys?
I had a link that used to work but anyway you can take a coolant sending unit and grind it down and rethread to to the metric size. Wasn't all the difficult to do and no adapter involved
I found the 1 wire sender at napa #ts4019. And with that I was able to find the 1 green wire connector. I had cut it off and set it aside.smh. Thx guys
i know you fixed the problem but i wanted to post a pic for anyone else wondering. i found my connecter so here is a pic of it. FAKE 2 wire connecter... lol
http://i18.photobucket.com/albums/b1...-23-51_248.jpg