IAT sensor integrated in Mass Air Flow Sensor? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-30-2006, 02:40 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jan 2006
Location: St.Marys,Ohio 45885
Posts: 89
Thanks: 0
Thanked 0 Times in 0 Posts
cballweg is on a distinguished road
Default IAT sensor integrated in Mass Air Flow Sensor?

Just was looking for the Idle Air Temperature Sensor and could not find it in the air intake anywhere so I checked the Mass Air Flow Sensor and removed it and it looks like the IAT sensor is coming out into the inside of the air intake like the one on my Grand Prix.I also checked the wires and the GXP had 5 wires in the Mass airflow sensor and my Grand Prix has 3 wires.The 3 wires were the same color as the 3 wires on the Grand Prix mass air flow sensor so I checked the color of the other 2 wires which were black and tan just like the 2 wires on the Grand Prix IAT sensor so Im thinking IAT sensor is integrated into the mass airflow sensor on our GXPs.Does anyone know for sure about this?If so I bet these would be very expensive to repalce whereas the Grand Prixs are cheap.I was looking at this because Im thinking of putting a resister in the IAT sensor to give it a readout of 30 degrees outside air temperature feedback to the computor so I get more timing advance which I have done on other cars.
cballweg is offline   Reply With Quote
Old 04-30-2006, 03:03 PM   #2
Administratus Emeritus
Certified Car Nut
 
GXP Venom's Avatar
 
Join Date: Jan 2006
Location: Purgatory, Pennsylvania
Posts: 16,538
Thanked 7 Times in 4 Posts
GXP Venom is on a distinguished road
Default

Not sure either. I got a printout sheet from dealer of that section of system when I picked up a TB gasket and It referred to that as only the maf. I wouldnt want timing advanced because of nitrous but may be worthy for non juiced N*.

My only qualms about those older tricks is that the PCM'* have become so complex you might be making it do other things to compensate for what you think is a good improvement.

Also would want highest octane possible if your mod is feasable, Knock sensors might overide your jumping IAT with a resistor.

And ya it would be pricey to replace If ya fubar it. The TB gasket alone was $46 Remember you've stepped into the realm of Caddy part pricing for our drivetrain.

There are wires running through the dual air box and maybe IAT is inside first box??

I'm gonna take it all apart if I ever stop coming up with major mod ideas
GXP Venom is offline   Reply With Quote
Old 04-30-2006, 03:17 PM   #3
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jan 2006
Location: St.Marys,Ohio 45885
Posts: 89
Thanks: 0
Thanked 0 Times in 0 Posts
cballweg is on a distinguished road
Default

I looked in he airbox and didnt see anything there either but I did see where the computor was and I couldent believe how small it was compared to my Grand Prixs.Also That 1 1/2 hose I talked about in an earlier thread with you is an air hose and not the wire for the computor that goes through the airbox.I seen that also.This is located just above the Tranny dipstick and you can pull it off the airbox so you can pull out the dipstick without removing the airbox lid to check your tranny fluid.I tried to trace where the other end comes out and I would have to take off the skirting under the bumper to trace it down so I left it alone.Its a long hose and goes down and to the front of the car and the other end comes in the side of the airbox and has a divider plate in the airbox.Have you modified your airbox yet?
cballweg is offline   Reply With Quote
Old 04-30-2006, 03:49 PM   #4
Administratus Emeritus
Certified Car Nut
 
GXP Venom's Avatar
 
Join Date: Jan 2006
Location: Purgatory, Pennsylvania
Posts: 16,538
Thanked 7 Times in 4 Posts
GXP Venom is on a distinguished road
Default

No I havent. I want to get inside that divider plate to see whats up before I figure if something costructive can be done to improve cold air flow.

The 05 has a wiring harness with a lot of wires running into the chamber that divides the box. So when time permits, I'm going to take the whole airbox apart. The cold air tube is sealed from engine bay and i dont want to trade a little extra hot air for all the cold it'* getting. and dont like the idea of a rice pipe (call it what ya want) in a beatifull new well designed engine bay.

Maybe room in front for something extending down towards ground which wouldnt look cheap or draw from the bay. I'm thinking a small rectagular stainless plenum pop riveted to very front off box dowm to height of bottom radiator support. The deep bend involved wouldnt be detrimental because the Cold air pipe would still be intact and providing the flow you had to start.

Improving the "ability" for more flow without TB rebore, PCM reflash, or something like advancing the timing is really just a cosmetic mod, and I'm not into wannabe mods....... just ones which would have a real impact on performance. I'm not looking to shave a tenth or two off an E.T. .... I'm looking for in your face blow the doors off an Avalon mods.LOL
GXP Venom is offline   Reply With Quote
Old 05-04-2006, 02:44 AM   #5
Administratus Emeritus
Certified Car Nut
 
GXP Venom's Avatar
 
Join Date: Jan 2006
Location: Purgatory, Pennsylvania
Posts: 16,538
Thanked 7 Times in 4 Posts
GXP Venom is on a distinguished road
Default

SURE would be nice if we got a Mr. Goodwrench Club member who could get us some tech sheets on all these dark areas
GXP Venom is offline   Reply With Quote
Old 05-04-2006, 02:58 AM   #6
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default

Not sure if it holds true as it does on the 3800 motors but even if you trick the IAT sensor it may not help too much as the PCMs (at least on the 3800 motors) often are smart enough and it does not offer much gain if any at all. This is the reason those $20 "performance" items you see on ebay do not work on bonnevilles
Hans is offline   Reply With Quote
Old 05-04-2006, 03:37 AM   #7
Administratus Emeritus
Certified Car Nut
 
GXP Venom's Avatar
 
Join Date: Jan 2006
Location: Purgatory, Pennsylvania
Posts: 16,538
Thanked 7 Times in 4 Posts
GXP Venom is on a distinguished road
Default

Exactly Hans and the 05 N* Pcm is most sophisticated to that date (per GM literature) It'* dawning on me the PCM has to be changed outright and thats a project and a half. I have been toying with the idea of ripping the engine from PCM control alltogether and wonder just what steps would be necessary. obviously a magneto (available) would be the first step. I have found away around GM owners not able to buy aftremarket PCM'* (reserved for sand buggys and custom ground up hot rod builds) but the $1800 price is stuck in my throat
GXP Venom is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Difference in Intake and Mass Air Flow sensor sprays anthonyv62 1992-1999 1 06-30-2006 05:48 PM
how do you test a mass air flow sensor? zo6vette 1992-1999 2 02-02-2005 10:26 AM
Mass Air Flow sensor problem telliot647 1987-1991 33 10-03-2004 10:48 PM
Mass Air Flow sensor=transmission problems? killer_cr80r Lounge 8 06-04-2004 12:53 AM
Mass Air Flow sensor JuanMarco19 1987-1991 2 06-17-2003 03:14 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:36 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.