N/A and turbo harness questions
11-28-05, 04:22 PM
#1
needs a cheaper hobby
Thread Starter
iTrader: (4)
Join Date: Dec 2004
Location: Morgantown WV
Posts: 781
Likes: 0
Received 0 Likes
on
0 Posts
N/A and turbo harness questions
Quick question for those who know..
I will soon be undergoing an engine wiring harness rebuild.
Heres the thing, I dont want any down time so i decided to use an old S4 N/A harness to trace out where everthing goes. Will this work well? From my understanding the difference between the Turbo and N/A harnesses is that the N/A? has the charging system on that harness to, along with the knock box.
do the harness go to the same pins on the t2 ecu as a N/A?(like wire from injector to pin XX)
Keeping in mind that I have no emissions what all will I have to wire...MAF, injectors, CAS, boost sensor, TPS, intake temp, O2 sensor, water temp on back of WP housing...what else?
What other differences will I find?
Is the plug for the N/A MAF the same as the turbo?
It possible to use the ecu plugs off of the N/A?
I will soon be undergoing an engine wiring harness rebuild.
Heres the thing, I dont want any down time so i decided to use an old S4 N/A harness to trace out where everthing goes. Will this work well? From my understanding the difference between the Turbo and N/A harnesses is that the N/A? has the charging system on that harness to, along with the knock box.
do the harness go to the same pins on the t2 ecu as a N/A?(like wire from injector to pin XX)
Keeping in mind that I have no emissions what all will I have to wire...MAF, injectors, CAS, boost sensor, TPS, intake temp, O2 sensor, water temp on back of WP housing...what else?
What other differences will I find?
Is the plug for the N/A MAF the same as the turbo?
It possible to use the ecu plugs off of the N/A?
11-28-05, 04:35 PM
#2
tom port.. AKA streetport
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
[QUOTE=red87tll
Is the plug for the N/A MAF the same as the turbo?
It possible to use the ecu plugs off of the N/A?[/QUOTE]
yes and yes.. im just using the n/a wire harness for the tII ecu and boost pressure sensor and afm. i THOUGHT the only thing missing between harness'es is the knock sensor? now i could be wrong im just as new to this as most noober's so dont quote me on this.
Is the plug for the N/A MAF the same as the turbo?
It possible to use the ecu plugs off of the N/A?[/QUOTE]
yes and yes.. im just using the n/a wire harness for the tII ecu and boost pressure sensor and afm. i THOUGHT the only thing missing between harness'es is the knock sensor? now i could be wrong im just as new to this as most noober's so dont quote me on this.
11-28-05, 04:42 PM
#3
very sleepy!!
Join Date: Jan 2005
Location: Tampa, FL
Posts: 1,052
Likes: 0
Received 0 Likes
on
0 Posts
so let's say you have a n326 ecu and you wanna use the n332 ecu. what would i need to make sure it'll run correctly(or at least decently)? if it can run, what effects will i encounter?
11-28-05, 04:47 PM
#4
tom port.. AKA streetport
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
ill let someone who knows a little more about this chime in but this is gonna get slammed cause its been posted many times. not trying to be an ***... all i know is the difference between harness'es (s4 and s5 are different) is the knock sensor wire is missing in the n/a harness. the boost pressure sensor, afm and ecu all should plug right into your existing n/a harness. 
i THINK this is all you really need to make it run decent. oh and im also using my safcII for fine tuning along with my wideband.
i THINK this is all you really need to make it run decent. oh and im also using my safcII for fine tuning along with my wideband.
11-28-05, 05:11 PM
#6
tom port.. AKA streetport
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
keep the s4's together( tII and n/a) and keep the s5's together. depending on the year of s4's there is the high imp. and low. what year is you car?
11-28-05, 05:17 PM
#7
very sleepy!!
Join Date: Jan 2005
Location: Tampa, FL
Posts: 1,052
Likes: 0
Received 0 Likes
on
0 Posts
i have a 88 and i know it's a s4, and a friend of mines gave me a tII ecu and he says it's an s4 also (n332) if it is true, can i use the pressure sensor as a boost sensor? what happens when the ecu doesnt detect the knock sensor?..and anyother things i may encounter
Trending Topics
11-28-05, 05:25 PM
#8
tom port.. AKA streetport
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
well considering yours is an 88, you now need to know which imp. it is. i needed the ecu from the tII n333 because mine is high imp. you can change the imp. with resistors but i already did that for 720's and didnt feel like hacking my wires some more. you can switch the boost pressure sensors form n/a to the tII. i dont think it will do anything bad without the knock sensor. not sure though, but im almost 100% sure its not needed. in the s4 anyways. it might be different with s5's?
and what other things do yopu think youll encounter?
have you made a list of what your using for the 6port turbo conersion( assuming thats what your doing)
and what other things do yopu think youll encounter?
have you made a list of what your using for the 6port turbo conersion( assuming thats what your doing)
11-28-05, 05:33 PM
#9
very sleepy!!
Join Date: Jan 2005
Location: Tampa, FL
Posts: 1,052
Likes: 0
Received 0 Likes
on
0 Posts
"modified" tII manifolds, tII tb, s4 tII turbo, 550cc's inj. (hi imp.), tII front cover, tII rear rotor housing (for the coolant feed), will be getting the fuel pump, and eventually the standalone. i'm not gonna start this project until i can find another rx to put it in. i'm in the process of rebuilding a spare engine...but the inj. are hi imp.
11-28-05, 05:38 PM
#10
tom port.. AKA streetport
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
because of the high imp. you will need the n333. i just picked up the ecu,boost sensor and afm for 100 shipped. search in the 4 sale adds and youll find at least 4 or 5 for sale.
11-28-05, 05:43 PM
#11
Passing life by
Originally Posted by red87tll
I will soon be undergoing an engine wiring harness rebuild.
Originally Posted by red87tll
From my understanding the difference between the Turbo and N/A harnesses is that the N/A? has the charging system on that harness to, along with the knock box.
The charging system is part of its own harness with connectors that plug into the body harness on all FC’s.
Originally Posted by red87tll
do the harness go to the same pins on the t2 ecu as a N/A?(like wire from injector to pin XX)
Originally Posted by red87tll
Keeping in mind that I have no emissions what all will I have to wire...MAF, injectors, CAS, boost sensor, TPS, intake temp, O2 sensor, water temp on back of WP housing...what else?
Originally Posted by red87tll
What other differences will I find?
Originally Posted by red87tll
Is the plug for the N/A MAF the same as the turbo?
Originally Posted by red87tll
It possible to use the ecu plugs off of the N/A?
11-28-05, 06:10 PM
#12
needs a cheaper hobby
Thread Starter
iTrader: (4)
Join Date: Dec 2004
Location: Morgantown WV
Posts: 781
Likes: 0
Received 0 Likes
on
0 Posts
other then the first post..and your post, i have no clue whats going in all the other posts.
I am going to make a new harness because I dont have any emissions stuff and i dont want all those plugs hanging around. ya know, just to clean it up.
As for the gauges, I have all autometer so the gauges dont matter.
Alternator exciter wire--what? thats the charging system part i was talking about. there is still a pin for that though, correct?
I am going to make a new harness because I dont have any emissions stuff and i dont want all those plugs hanging around. ya know, just to clean it up.
As for the gauges, I have all autometer so the gauges dont matter.
Alternator exciter wire--what? thats the charging system part i was talking about. there is still a pin for that though, correct?
11-28-05, 06:17 PM
#13
Passing life by
Originally Posted by red87tll
I am going to make a new harness because I dont have any emissions stuff and i dont want all those plugs hanging around. ya know, just to clean it up.
Originally Posted by red87tll
Alternator exciter wire--what? thats the charging system part i was talking about. there is still a pin for that though, correct?
11-28-05, 06:21 PM
#14
Full Member
Join Date: Sep 2005
Location: Orlando
Posts: 134
Likes: 0
Received 0 Likes
on
0 Posts
I'm going to swap my t2 harness for n/a harness just because t2 harness is so mess up , which is causeing lot of hesitation. So I guess all I have to worry about is if the n/a harness is low or high imp. Right?
11-28-05, 06:39 PM
#15
Passing life by
Originally Posted by rotary_yankee
I'm going to swap my t2 harness for n/a harness just because t2 harness is so mess up , which is causeing lot of hesitation. ?
Originally Posted by rotary_yankee
So I guess all I have to worry about is if the n/a harness is low or high imp. Right?
11-28-05, 08:20 PM
#16
very sleepy!!
Join Date: Jan 2005
Location: Tampa, FL
Posts: 1,052
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 88rxn/a
because of the high imp. you will need the n333. i just picked up the ecu,boost sensor and afm for 100 shipped. search in the 4 sale adds and youll find at least 4 or 5 for sale.
thanks for the heads up. guess i will be selling my ecu as well.
11-28-05, 09:26 PM
#17
Passing life by
Originally Posted by 88rxn/a
because of the high imp. you will need the n333. i just picked up the ecu,boost sensor and afm for 100 shipped. search in the 4 sale adds and youll find at least 4 or 5 for sale.
Originally Posted by TitosToy
thanks for the heads up. guess i will be selling my ecu as well.
Tito any S4 ECU will do the job identically in N/A form and any TII ECU will do the job in a boosted application with the added exception of the N338.
Last edited by iceblue; 11-28-05 at 09:29 PM.
11-28-05, 09:34 PM
#18
tom port.. AKA streetport
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
i only bought that particular ecu because i already have resistors in and didnt want to hack the wires more. this( i think) is for the s4 high imp. isnt it(n333)? your right im not sure. i posted this on this thread a while ago.
11-28-05, 09:38 PM
#19
Passing life by
You are not understanding. The only time the ECU is dependant like that is between S4 and S5.
I do not care what year S4 you have any S4 computer will work! You only have to match the injectors to the harness you are using or modify the harness.
I do not care what year S4 you have any S4 computer will work! You only have to match the injectors to the harness you are using or modify the harness.
11-29-05, 05:56 AM
#21
very sleepy!!
Join Date: Jan 2005
Location: Tampa, FL
Posts: 1,052
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by iceblue
No matter what impedance your car came with the ECU still sees 12v .
). i do recall from anoher thread that the ecu sends hi volt signals (or something like that) no matter what, and the only reason that there are resistors is cuz of the injectors need a low volt signal. am i right so far?
11-29-05, 10:15 AM
#24
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
Originally Posted by red87tll
Quick question for those who know..
I will soon be undergoing an engine wiring harness rebuild.
Heres the thing, I dont want any down time so i decided to use an old S4 N/A harness to trace out where everthing goes. Will this work well? From my understanding the difference between the Turbo and N/A harnesses is that the N/A? has the charging system on that harness to, along with the knock box.
do the harness go to the same pins on the t2 ecu as a N/A?(like wire from injector to pin XX)
Keeping in mind that I have no emissions what all will I have to wire...MAF, injectors, CAS, boost sensor, TPS, intake temp, O2 sensor, water temp on back of WP housing...what else?
What other differences will I find?********************************************* ************************************************** *********************************
If you remove your turbo harness and install a non turbo harness ,the car will start and run.
The non turbo has no provision for a knock box.
The major problem is with the two connectors on the EMISSIONS HARNESS that mate with the FRONT HARNESS.
There will be NO output signal to the boost gauge at all.
If your limitiing yourself to those items you listed in your post, they'll all work without any changing of the harness.
Your NEED to get a copy of the FSM and compared the wiring on connectors X-15 and X-16, the two plugs that mate the front harness with the emissions harness.
************************************************** ************************************************** ************************************************** ********************************************
Is the plug for the N/A MAF the same as the turbo?******YES
It possible to use the ecu plugs off of the N/A?
I will soon be undergoing an engine wiring harness rebuild.
Heres the thing, I dont want any down time so i decided to use an old S4 N/A harness to trace out where everthing goes. Will this work well? From my understanding the difference between the Turbo and N/A harnesses is that the N/A? has the charging system on that harness to, along with the knock box.
do the harness go to the same pins on the t2 ecu as a N/A?(like wire from injector to pin XX)
Keeping in mind that I have no emissions what all will I have to wire...MAF, injectors, CAS, boost sensor, TPS, intake temp, O2 sensor, water temp on back of WP housing...what else?
What other differences will I find?********************************************* ************************************************** *********************************
If you remove your turbo harness and install a non turbo harness ,the car will start and run.
The non turbo has no provision for a knock box.
The major problem is with the two connectors on the EMISSIONS HARNESS that mate with the FRONT HARNESS.
There will be NO output signal to the boost gauge at all.
If your limitiing yourself to those items you listed in your post, they'll all work without any changing of the harness.
Your NEED to get a copy of the FSM and compared the wiring on connectors X-15 and X-16, the two plugs that mate the front harness with the emissions harness.
************************************************** ************************************************** ************************************************** ********************************************
Is the plug for the N/A MAF the same as the turbo?******YES
It possible to use the ecu plugs off of the N/A?
Last edited by HAILERS; 11-29-05 at 10:18 AM.
11-29-05, 10:40 AM
#25
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
Originally Posted by TitosToy
so let's say you have a n326 ecu and you wanna use the n332 ecu. what would i need to make sure it'll run correctly(or at least decently)? if it can run, what effects will i encounter?
You'd have to deal with pins 1R and 2K and 3D. See the fsm and CONTROL UNIT in the fuel section and compare the turbo vs the non turbo for these pins. The fsm is free and online.