HELP! Wiring a LS1 into 87 firebird
#1
TECH Apprentice
Thread Starter
iTrader: (5)
Join Date: Jan 2005
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I'm wiring a LS1 into a 87 firebird everything has been going good just have a few questions.
I am installing a 1999 ta LS1.
Looking to hook pin # 33 (BLUE) purple to the brake pedal switch, dose it need a positive or a negative when pedal is pushed??
I'm looking to retain the Evap system. I see on my pin outs 3 wires for the Tank pressure sensor, 46 (blue) gray 5v signal, 23 (blue)gray fuel pressure and level ground, 64 (Red) DK Green fuel pressure sensor signal.
I only see 1 wire for the Evap control 45 (red) White Evap control is this wire wired directly to the evap solenoid and what do I do with the other wire on the solenoid?
Also I was going to install a different fuel level sender so the factory dash gauge works. Will this not work with the evap system? I see pin 54 (red) purple fuel level sensor. So the new sender would send a wrong signal to the ECM??
Thanks for any help!!
I am installing a 1999 ta LS1.
Looking to hook pin # 33 (BLUE) purple to the brake pedal switch, dose it need a positive or a negative when pedal is pushed??
I'm looking to retain the Evap system. I see on my pin outs 3 wires for the Tank pressure sensor, 46 (blue) gray 5v signal, 23 (blue)gray fuel pressure and level ground, 64 (Red) DK Green fuel pressure sensor signal.
I only see 1 wire for the Evap control 45 (red) White Evap control is this wire wired directly to the evap solenoid and what do I do with the other wire on the solenoid?
Also I was going to install a different fuel level sender so the factory dash gauge works. Will this not work with the evap system? I see pin 54 (red) purple fuel level sensor. So the new sender would send a wrong signal to the ECM??
Thanks for any help!!
#3
TECH Addict
iTrader: (22)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
The brake switch wire is C207 pin P (ppl) for 87
Tank pressure doesnt have to be hooked up for EVAP to function, heck you can skip the LS1 tank completely and still have EVAP
Wire in the solenoid at the rail and either hook up the canister on the plastic tank or the stock 3rd gen canister up front when using the stock tank. Both function the same
Use a mid 90's grand prix fuel level sender. It snaps right into the LS1 bucket assembly and offers the correct 0-90ohm sender. If you reuse the stock tank, its just a matter of replacing the pump
Tank pressure doesnt have to be hooked up for EVAP to function, heck you can skip the LS1 tank completely and still have EVAP
Wire in the solenoid at the rail and either hook up the canister on the plastic tank or the stock 3rd gen canister up front when using the stock tank. Both function the same
Use a mid 90's grand prix fuel level sender. It snaps right into the LS1 bucket assembly and offers the correct 0-90ohm sender. If you reuse the stock tank, its just a matter of replacing the pump
#5
TECH Apprentice
Thread Starter
iTrader: (5)
Join Date: Jan 2005
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Ok I found my answer.
On the evap purge valve on the tank it has 2 wires
A) Pink ignition feed
b)Dk green white to ECM 34 (red) dk green white
On the evap purge valve on the tank it has 2 wires
A) Pink ignition feed
b)Dk green white to ECM 34 (red) dk green white
Last edited by 1Hotbird; 01-15-2012 at 09:03 AM.