LT1/LT4 Intake Sensor

[Floyd B.]

Can someone tell me what this sensor does? I can't find it called out in the C4 parts catalog or '96 Y Platform service manual. Also do we know the significance of the numbers stamped above the connector? 039 5345 on this one. I might guess that the 5345 is a Julian date code in the form YDDD (12/10/95). Which would match up with this 12/19/95 engine.

I need to identify it b/c the green connector disintegrated in my hand when I tried to remove it. 15 years of heat and oxidation have turned it into dust.

IMG_4538.jpg IMG_4539.jpg

[Keith B.]

Re: LT1/LT4 Intake Sensor

That is the MAP sensor. AcDelco part number 12569240. not sure on the green connector. I would think all GM cars would be the same

[Floyd B.]

Re: LT1/LT4 Intake Sensor

Thanx. The connector is a Packard Weather Pack series three cavity connector. Unfortunately I have never seen these in the odd green color of the original. Fortunately I have all the tools necessary to build Packard terminals. I'll have to get an original and repin it. A 10 minute job once I have an original and I think I know where I can get one.

[Pat M.]

Re: LT1/LT4 Intake Sensor

Floyd, my sensor reads "6142", which could be a Julian date of 5/22/96, which would also fit with my engine date of 6/4/96.

[Floyd B.]

Re: LT1/LT4 Intake Sensor

Thanx Pat. I should have looked at the TIM&JG more carefully before hitting the keyboard. Pages 138 and 139 have a picture of a MAP sensor and indicate that it has a Julian date.

[Joe L.]

Re: LT1/LT4 Intake Sensor

Can someone tell me what this sensor does? I can't find it called out in the C4 parts catalog or '96 Y Platform service manual. Also do we know the significance of the numbers stamped above the connector? 039 5345 on this one. I might guess that the 5345 is a Julian date code in the form YDDD (12/10/95). Which would match up with this 12/19/95 engine.

I need to identify it b/c the green connector disintegrated in my hand when I tried to remove it. 15 years of heat and oxidation have turned it into dust.

[ATTACH=CONFIG]58338[/ATTACH] [ATTACH=CONFIG]58339[/ATTACH]

Floyd-------

The one you need is a pigtail known as GM #12085502. It includes a GREEN connector like the original. The bad news: it GM lists for about 42 bucks. However, keep in mind that any USED connector you might find is likely going to be at least somewhat deteriorated. So, how much life will it really have left in it?

[Floyd B.]

Re: LT1/LT4 Intake Sensor

Better yet, someone pointed me to this:

http://www.ebay.com/itm/MAP-Sensor-Connector-Pigtail-Harness-93-97-LT1-LT4-GM-Repair-Connector-Wire-TPI-/151403313601?pt=Motors_Car_Truck_Parts_Accessories&fits=Model:Corvette

[Joe L.]

Re: LT1/LT4 Intake Sensor

Better yet, someone pointed me to this:

http://www.ebay.com/itm/MAP-Sensor-C...Model:Corvette

Floyd------


The problem here is that when I see such a huge disparity in price between GM and a piece like this, I've got to wonder if the quality is the same. It's possible that the two are exactly the same piece. However, it's also possible that there is a difference. I'd need to get one of each in my hand to really compare closely. Even that might not "tell-the-tale", though. Sometimes, beauty is more than skin-deep.

[Edward J.]

Re: LT1/LT4 Intake Sensor

Better yet, someone pointed me to this:

http://www.ebay.com/itm/MAP-Sensor-C...Model:Corvette

Floyd the color seems off ( the green is to bright). I may have one I will look tomorrow and let you know, If I do I send it to you.

[Floyd B.]

Re: LT1/LT4 Intake Sensor

Gentlemen,

I received the replacement connector today. The original is on the left in this photo, the replacement on the right. The color of the replacement is a bit more of a lime green - is it a Chinese knock-off? Perhaps. They both look to be standard Packard Weather Pack connectors. I highly doubt there is any functional difference. Using the part number supplied by Joe I see I can get one from the GM parts network online for about $30 delivered to my door. I think I'll order one just to see if the color is more like the original.
IMG_2209.jpg

[Floyd B.]

Re: LT1/LT4 Intake Sensor

I received the connector I ordered from GM - Part #12085502. As you can see it is identical to the $10 version I bought on ebay - even embossed markings are identical. From GM this part cost $23.09 + $12.97 Processing and Handling. In fact the $10 ebay part (on the left) has the correct thickness and color wires while the GM part does not. Neither of them is colored the same as the original. Perhaps the original got darker with time and heat?

IMG_2286.jpg

[Joe L.]

Re: LT1/LT4 Intake Sensor

I received the connector I ordered from GM - Part #12085502. As you can see it is identical to the $10 version I bought on ebay - even embossed markings are identical. From GM this part cost $23.09 + $12.97 Processing and Handling. In fact the $10 ebay part (on the left) has the correct thickness and color wires while the GM part does not. Neither of them is colored the same as the original. Perhaps the original got darker with time and heat?

[ATTACH=CONFIG]58891[/ATTACH]

Floyd------


I agree; I think the connectors are the same. I expect the connectors originated from the same manufacturing source. However, GM's source for the make-up of he pigtail assembly must be different or, perhaps, GM's specifications for the SERVICE pigtail calls for the gray wires due to its use for multiple applications.

I doubt that this sort of plastic darkened over time. So, I suspect that the coloration used for this connector manufactured 20 years ago was slightly different than that used today.

[Floyd B.]

Re: LT1/LT4 Intake Sensor

I doubt that this sort of plastic darkened over time. So, I suspect that the coloration used for this connector manufactured 20 years ago was slightly different than that used today.

I think you're right. It's as close as I'm going to get.

[Floyd B.]

Re: LT1/LT4 Intake Sensor

To complete this thread I'll add one last detail. The seals on the original terminals are read while they are green on the replacement connector.

IMG_2291.jpg

This is inconsequential because there is no need to cut wires. Simply push the original terminals out of the old connector housing using this tool and push them into the new housing.

http://www.ebay.com/itm/110341063950?_trksid=p2060778.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

[Joe L.]

Re: LT1/LT4 Intake Sensor

To complete this thread I'll add one last detail. The seals on the original terminals are read while they are green on the replacement connector.

[ATTACH=CONFIG]58896[/ATTACH]

This is inconsequential because there is no need to cut wires. Simply push the original terminals out of the old connector housing using this tool and push them into the new housing.
http://www.ebay.com/itm/110341063950...%3AMEBIDX%3AIT

Floyd------


I noticed that before but I failed to mention it. However, I don't think the insulators can be seen when the connector is installed in the sensor.