Brought in for service, wrong sensor on intercooler pipe?
Thread Starter
Member
Joined: 05-20-2014
Posts: 46
From: Concord, NC
Brought in for service, wrong sensor on intercooler pipe?
Brought my SS in yesterday to have things looked over because the other day it starting idling weird. It would not idle steady and was bouncing a bit while just sitting still, but only does it sometimes and noticed a ticking sound coming from near the top of the motor or back near the turbo like something was trying to engage. After the tech looked things over, I had new plugs put in it as it still had the factory plugs and he said the sensor near the bottom of the left side intercooler pipe did not look correct and was held in with a hose clamp. ??? I have not put in on jack stands to look just yet and they are ordering me a OEM replacement for it as well as the clip for the right side pipe that is missing at the top as I noticed that tube was easy to move around.
Since it appears I have the GMTU already on my SS from the previous owner, can someone tell me what parts and/or components come with that kit and if I need to be concerned with the "stock" sensor they are ordering me for that left side? Just want to make sure they aren't ordering me something that may have been upgraded etc...
I can't find a schematic online to post a pic of what I am talking about and what sensor he showed me in the service repair book.
Hope all that makes sense. :)
Since it appears I have the GMTU already on my SS from the previous owner, can someone tell me what parts and/or components come with that kit and if I need to be concerned with the "stock" sensor they are ordering me for that left side? Just want to make sure they aren't ordering me something that may have been upgraded etc...
I can't find a schematic online to post a pic of what I am talking about and what sensor he showed me in the service repair book.
Hope all that makes sense. :)
Senior Member
Joined: 10-11-2005
Posts: 259
From: NJ
GMTU uses different sensors. 3 bar. They have a different part number.
TMAP Sensor 55206797
Link to instructions
http://www.google.com/url?sa=t&rct=j...67720277,d.cWc
TMAP Sensor 55206797
Link to instructions
http://www.google.com/url?sa=t&rct=j...67720277,d.cWc
Thread Starter
Member
Joined: 05-20-2014
Posts: 46
From: Concord, NC
GMTU uses different sensors. 3 bar. They have a different part number.
TMAP Sensor 55206797
Link to instructions
http://www.google.com/url?sa=t&rct=j...67720277,d.cWc
TMAP Sensor 55206797
Link to instructions
http://www.google.com/url?sa=t&rct=j...67720277,d.cWc
Last edited by Pyr0TeK; May 27, 2014 at 01:01 PM.
Platinum Member
Joined: 12-06-2009
Posts: 11,718
From: Alabama
Picture of the GMTU Parts list:
(2nd ones on the list are the plug/n/play harness.)
Attachment 16271
(2nd ones on the list are the plug/n/play harness.)
Attachment 16271
Last edited by whopper; Jun 30, 2014 at 02:18 PM.
Platinum Member
Joined: 12-06-2009
Posts: 11,718
From: Alabama
Last edited by firemangeorge; May 30, 2014 at 11:07 PM.
Thread Starter
Member
Joined: 05-20-2014
Posts: 46
From: Concord, NC
OK so I brought my HHR back up to the dealership today because I was pretty sure they were ordering the wrong part (which they were). They were ordering me the stock TMAP sensor so I printed out some info and parts you guys have provided (THANK YOU!) and then had them put it on the lift to look things over. I snapped some pics. The bottom sensor has had the bolt flange dremeled off flush and was installed using a couple of hose clamps that were too small so they combined two in order to make them large enough to make it around the pipe.
While it was running and sitting idle, he hook a laptop up to it and looked at the codes it had thrown since he reset them the other day. No codes on the dashboard though. I don't have the exact codes to post but one was the BPV reported stuck at 2300 rpm's, which might explain why it was seeming sluggish and jumpy on the interstate today while I was in 4th gear under no turbo load, basically just cruising not pressing the gas at all. Do I need to look at the Forge BPV or ???
Does anyone know if I can order just one of the TMAP sensors alone to replace the one on the bottom that is currently "pipe-clamped" into place with no way to attach it with a bolt? I am guessing the previous owner may have broke it and had no other choice on how to attach it. Having the current sensor attached the way it is an issue (besides it bothering the hell out of my OCD... lol) ??
Also noticed a cut wire on the top sensor, which from the install instruction sheet posted here, should not be needed correct?
I'm just trying to get this car straightened out before I break something because of the way things are currently installed.
I know it is kind of hard to explain things online in detail but this is the best I can do. I can provide any more detail if you guys need it and thanks again for pitching and helping me get on board with this car.
Pics:
While it was running and sitting idle, he hook a laptop up to it and looked at the codes it had thrown since he reset them the other day. No codes on the dashboard though. I don't have the exact codes to post but one was the BPV reported stuck at 2300 rpm's, which might explain why it was seeming sluggish and jumpy on the interstate today while I was in 4th gear under no turbo load, basically just cruising not pressing the gas at all. Do I need to look at the Forge BPV or ???
Does anyone know if I can order just one of the TMAP sensors alone to replace the one on the bottom that is currently "pipe-clamped" into place with no way to attach it with a bolt? I am guessing the previous owner may have broke it and had no other choice on how to attach it. Having the current sensor attached the way it is an issue (besides it bothering the hell out of my OCD... lol) ??
Also noticed a cut wire on the top sensor, which from the install instruction sheet posted here, should not be needed correct?
I'm just trying to get this car straightened out before I break something because of the way things are currently installed.
I know it is kind of hard to explain things online in detail but this is the best I can do. I can provide any more detail if you guys need it and thanks again for pitching and helping me get on board with this car.
Pics:
Last edited by Pyr0TeK; May 27, 2014 at 06:24 PM.
Platinum Member
Joined: 12-06-2009
Posts: 11,718
From: Alabama
Odd. But your lower sensor seems to be turned 90 degrees to the left from where it should be. At least that's how it looks to me in the picture.
The wire plug end of the sensor should be pointing to the AC compressor. Unless someone has "modified" it to clear it from contacting the compressor. That may be the reason for the hose clamp since the bolt holes would no longer line up.
Here's the only picture I have on file that shows the lower Tmap wires pointing at the AC compressor. The black bracket is just something I added to keep the lower charge pipe pushed back for more clearance from the compressor.
Attachment 16274
Here's a pic of what the stock BPV looks like.
Attachment 16275
The wire plug end of the sensor should be pointing to the AC compressor. Unless someone has "modified" it to clear it from contacting the compressor. That may be the reason for the hose clamp since the bolt holes would no longer line up.
Here's the only picture I have on file that shows the lower Tmap wires pointing at the AC compressor. The black bracket is just something I added to keep the lower charge pipe pushed back for more clearance from the compressor.
Attachment 16274
Here's a pic of what the stock BPV looks like.
Attachment 16275
Last edited by firemangeorge; May 30, 2014 at 11:07 PM.
Thread Starter
Member
Joined: 05-20-2014
Posts: 46
From: Concord, NC
Odd. But your lower sensor seems to be turned 90 degrees to the left from where it should be. At least that's how it looks to me in the picture.
The wire plug end of the sensor should be pointing to the AC compressor. Unless someone has "modified" it to clear it from contacting the compressor. That may be the reason for the hose clamp since the bolt holes would no longer line up.
Here's the only picture I have on file that shows the lower Tmap wires pointing at the AC compressor. The black bracket is just something I added to keep the lower charge pipe pushed back for more clearance from the compressor.
The wire plug end of the sensor should be pointing to the AC compressor. Unless someone has "modified" it to clear it from contacting the compressor. That may be the reason for the hose clamp since the bolt holes would no longer line up.
Here's the only picture I have on file that shows the lower Tmap wires pointing at the AC compressor. The black bracket is just something I added to keep the lower charge pipe pushed back for more clearance from the compressor.
Platinum Member
Joined: 12-06-2009
Posts: 11,718
From: Alabama
The tech has to get the reflash sent to him from GM. It is a "VIN' based reflash from the way I understand it.
There is also more than one available. Apparently there is a different reflash based on the 5 speed/auto difference.(I think)
Also. There IS a different reflash for those that have the vacuum assist pump installed.
Not trying to scare you, just hope your tech gets it right.
The tech that did mine was a first timer at the GMTU. He was/is the lead Vette tech at the dealership. After doing mine, he said it was a whole lot easier than the instructions made it out to be.
There is also more than one available. Apparently there is a different reflash based on the 5 speed/auto difference.(I think)
Also. There IS a different reflash for those that have the vacuum assist pump installed.
Not trying to scare you, just hope your tech gets it right.
The tech that did mine was a first timer at the GMTU. He was/is the lead Vette tech at the dealership. After doing mine, he said it was a whole lot easier than the instructions made it out to be.
Thread Starter
Member
Joined: 05-20-2014
Posts: 46
From: Concord, NC
The tech has to get the reflash sent to him from GM. It is a "VIN' based reflash from the way I understand it.
There is also more than one available. Apparently there is a different reflash based on the 5 speed/auto difference.(I think)
Also. There IS a different reflash for those that have the vacuum assist pump installed.
Not trying to scare you, just hope your tech gets it right.
The tech that did mine was a first timer at the GMTU. He was/is the lead Vette tech at the dealership. After doing mine, he said it was a whole lot easier than the instructions made it out to be.
There is also more than one available. Apparently there is a different reflash based on the 5 speed/auto difference.(I think)
Also. There IS a different reflash for those that have the vacuum assist pump installed.
Not trying to scare you, just hope your tech gets it right.
The tech that did mine was a first timer at the GMTU. He was/is the lead Vette tech at the dealership. After doing mine, he said it was a whole lot easier than the instructions made it out to be.
