1Hotbird

iTrader: (5)

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!!

blainemaxwell

#33 (BLUE) needs +12v when pedal is pressed.

Pocket

iTrader: (22)

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

1Hotbird

iTrader: (5)

I have a 99 ta tank that I'm planning on using.

So what about the 2 wire plug on the charcoal can on the 99 ta tank the evap vent solenoid?

Whats the pressure sensor used for then?

1Hotbird

iTrader: (5)

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

LS1MCSS

iTrader: (18)

You have this backwards. Pin 33 needs 12V when the pedal is not pushed and needs an open circuit when the pedal is pushed, so the convertor will unlock. Here is the schematic.

1Hotbird

iTrader: (5)

good info thank you.