TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

wiring up the holley throttle body...

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Old Nov 20, 2001 | 07:01 PM
  #1  
Z28 Boy's Avatar
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From: Charlotte, NC
Car: 1991 Camaro RS
Engine: GMPP 350 HO w/TBI
Transmission: 700R-4
Axle/Gears: 10-bolt w/3.73s
wiring up the holley throttle body...

ok guys, i am in the process or redoing a bunch of wiring on my car. i had a lot of the connections using the terminal things that you can disconnect because i was switching thorttle boodies like every other week.

well, unfortunately, i totally forgot how the stock wiring hooks back up to the holley wiring.

correct me if i am wrong..

INJECTORS:
match colors with stock

TPS:
its already connected, but i want to double check..so how does it go?

IAC:
i originally thought that it was no change..you just plug it in, but for some reason i have a thought in my head that you have to switch the blue wires? am i right?

sorry for a stupid question..i searched the archives for like half an hour and couldnt find anything.

thanks guys.

-brian

------------------
1991 Camaro RS
GMPP 350 HO crate engine - 454 TBI, MSD ignition, SLP exhaust, everything is new
700R4 - 2,400 stall converter, vette servo, shift kit
My car's webpage - z28boy.cz28.com
President - Central New York F-Body Association
Email - z28boy@twcny.rr.com
AIM - "Z28 Boy"

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Old Nov 20, 2001 | 08:49 PM
  #2  
Mark305TBI's Avatar
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Joined: Jul 1999
Posts: 1,431
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From: Huntsville, AL
Car: '00 Chevrolet Corvette
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73
I didn't change any of the wiring when I installed mine. In '91 the TPS wiring might be different. I know that the connector is different on my friend's '92. I don't know if this helps you out any or not...

-Mark W.
'88 SC Camaro w/ 305 TBI
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Old Nov 25, 2001 | 08:07 PM
  #3  
Z28 Boy's Avatar
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Joined: Nov 1999
Posts: 1,069
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From: Charlotte, NC
Car: 1991 Camaro RS
Engine: GMPP 350 HO w/TBI
Transmission: 700R-4
Axle/Gears: 10-bolt w/3.73s
c'mon, somebody's gotta know?

its sunday night...you guys are all supposed to be back in the dorms or whatever by now!

-brian

------------------
1991 Camaro RS
GMPP 350 HO crate engine - 454 TBI, MSD ignition, SLP exhaust, everything is new
700R4 - 2,400 stall converter, vette servo, shift kit
My car's webpage - z28boy.cz28.com
President - Central New York F-Body Association
Email - z28boy@twcny.rr.com
AIM - "Z28 Boy"

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Old Nov 25, 2001 | 08:19 PM
  #4  
firbird's Avatar
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Joined: Apr 2001
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From: NW FL
well the injectors are the same and i have kept the wireing on the iac the same and just pluged it in without any problem the tps i am checking right now
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Old Nov 25, 2001 | 08:24 PM
  #5  
firbird's Avatar
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From: NW FL
ok.... i checked the tps and white is closest to the passanger black is closest to the radiator and blue is in the middle so it goes white, blue, black, from left to right.
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Old Nov 28, 2001 | 04:21 PM
  #6  
Z28 Boy's Avatar
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Joined: Nov 1999
Posts: 1,069
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From: Charlotte, NC
Car: 1991 Camaro RS
Engine: GMPP 350 HO w/TBI
Transmission: 700R-4
Axle/Gears: 10-bolt w/3.73s
c'mon i know you guys have to have some answers for me...is the IAC the same as stock? i had it the same as stock before, and i know that is what you did to firbird, but there has been a lot of talk about whether or not it should be reversed.

when i did a search there were at least a few posts concering the fact that if you use a stock ECM the blue ones should be switched, and if you have a truck ecm (7747) that they are not supposed to be.

any second opinions?

-brian

[This message has been edited by Z28 Boy (edited November 28, 2001).]
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Old Nov 28, 2001 | 04:31 PM
  #7  
Birmass's Avatar
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From: Southern MD, USA
In case you're still looking for an answer they are all the same. Your ECM and 7747 ECM have the same pin connections except for a few grounds which means you don't have to switch anything.

------------------
88 firebird formula
350 Vortec, Accel Pro-Ram MPFI
214int/224exh, .471int/.491exh
Edelbrock headers
T56 - SIX-speed
open 3.73's
3 inch Flowmaster catback
I love pissing those LS1's off

Old time with TBI - 13.9 @103mph, 2.6 60ft

My Formula
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Old Nov 28, 2001 | 06:34 PM
  #8  
Z28 Boy's Avatar
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Supreme Member
 
Joined: Nov 1999
Posts: 1,069
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From: Charlotte, NC
Car: 1991 Camaro RS
Engine: GMPP 350 HO w/TBI
Transmission: 700R-4
Axle/Gears: 10-bolt w/3.73s
ok thanks guys..here ius the post that got me thinking...

https://www.thirdgen.org/messgboard/...ML/002015.html

????

-brian
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Old Nov 28, 2001 | 07:59 PM
  #9  
firbird's Avatar
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Joined: Apr 2001
Posts: 935
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From: NW FL
hey snflupigus i ran off stock without changing and it was good, and i know jprevost and i think brain did not do that.
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