08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

lower charge pipe & MAP wire Q's

Thread Tools
 
Search this Thread
 
Old 07-14-2015, 01:00 PM
  #1  
Senior Member
Thread Starter
iTrader: (4)
 
soundjunky's Avatar
 
Join Date: 05-26-09
Location: Calgary, Alberta
Posts: 13,590
Received 38 Likes on 30 Posts
lower charge pipe & MAP wire Q's

I am hoping that I can make one thread and get the two answers I am looking for;
Before anyone says it, I did a couple advanced searches, and came up with zilch.

I am at work, my car is nowhere near by, and I was hoping to take car of this today on my break(s);

1) I want to do a boost leak test to my lower charge pipe post-nozzle install;
Can anyone tell me the size of the lower charge pipe hose ends?
(I am only going to test the lower charge pipe)
intercooler side & throttlebody side??

2) I am going to use a progressive controller that gets a signal from the MAP;
Can someone please tell me which wire it is that I need to tap into?
(the wire colour/identifier from our factory engine wiring harness; there are three wires; I was going to tap into the MAP on the intake)


I thank anyone in advance who can help me out!
Old 07-14-2015, 06:22 PM
  #2  
Senior Member
Thread Starter
iTrader: (4)
 
soundjunky's Avatar
 
Join Date: 05-26-09
Location: Calgary, Alberta
Posts: 13,590
Received 38 Likes on 30 Posts
wow!

No one?

There is no way that this is too technical for the bulk of you here...
Old 07-14-2015, 07:40 PM
  #3  
Senior Member
iTrader: (6)
 
ECaulk's Avatar
 
Join Date: 07-19-10
Location: Houston, Texas
Posts: 26,574
Received 836 Likes on 733 Posts
lower charge pipe & MAP wire Q's

You gave it what 4h? The site is not that busy anymore.

Cold side should be 2.5inch.

Can't help you with the map wire
Old 07-14-2015, 08:44 PM
  #4  
Moderator
Platinum Member
Moderator
iTrader: (1)
 
Slowbalt2000's Avatar
 
Join Date: 05-15-11
Location: Livonia, MI
Posts: 27,413
Received 584 Likes on 519 Posts
Intercooler is 2.5" but the tb is likely bigger i know my l61 tb was 2.75"
Old 07-14-2015, 08:49 PM
  #5  
Moderator
Platinum Member
Moderator
iTrader: (1)
 
Slowbalt2000's Avatar
 
Join Date: 05-15-11
Location: Livonia, MI
Posts: 27,413
Received 584 Likes on 519 Posts
Name:  E0498E3A-90DB-4025-AA51-2AC4D8DB46F2_zpshr4wwqct.gif
Views: 22
Size:  13.8 KB
Old 07-15-2015, 03:02 PM
  #6  
Senior Member
Thread Starter
iTrader: (4)
 
soundjunky's Avatar
 
Join Date: 05-26-09
Location: Calgary, Alberta
Posts: 13,590
Received 38 Likes on 30 Posts
I was really hoping to have gotten a quick reply yesterday, and chased down all the parts I needed to make a leak tester for the cold pipe at lunch;
I actually saw something like 35 views before I made my comment (post #2).

Ok, something came up last night, so I brought my spare lower charge pipe to work today, the ID (for anyone looking for this in the future) is:
Intercooler side: 2.5"
Throtlebody side: 2.75"

I've identified my proper instructions based off the wire colours from the progressive controller, here is the PDF;
http://www.alcohol-injection.com/ins...02%20vers1.pdf
Page #10 shows how to wire it.
If I am to be correct, I am guessing that the green MAP/MAFF signal wire needs to get tapped into the light green wire (pin #3) for the plug - does this sound correct?
Old 07-15-2015, 05:54 PM
  #7  
Moderator
Platinum Member
Moderator
iTrader: (1)
 
Slowbalt2000's Avatar
 
Join Date: 05-15-11
Location: Livonia, MI
Posts: 27,413
Received 584 Likes on 519 Posts
Thats what i would assume if the instructions say map signal
Old 07-16-2015, 02:28 PM
  #8  
Senior Member
Thread Starter
iTrader: (4)
 
soundjunky's Avatar
 
Join Date: 05-26-09
Location: Calgary, Alberta
Posts: 13,590
Received 38 Likes on 30 Posts
Originally Posted by Slowbalt2000
Thats what i would assume if the instructions say map signal
I am guessing that was an attempt at sarcasm (correct me if I was wrong).
The instructions only say "MAP/MAFF";
I asked because I am guessing that pins #1 is for the incoming (full) voltage;
I am also guessing that wire #2 is a "check" or referance to verify to the ecm that the MAP is functioning correct - but I do not quite understand wholly how our MAP sensors work - I would think it should be voltage in & resisted voltage out ~ depending on the observed vacuum/pressure...
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
taintedred07
2.0L LNF Performance Tech
32
05-28-2022 03:47 AM
KMO43
Front Page News
33
01-12-2016 12:01 AM
dennis69
Appearance
9
10-20-2015 04:49 PM
717ssbalt
2.0L LNF Performance Tech
9
10-02-2015 04:01 PM
nathan112i
Featured Car Showcase
41
09-30-2015 07:12 PM



Quick Reply: lower charge pipe & MAP wire Q's



All times are GMT -4. The time now is 05:36 PM.