customblackbird

iTrader: (2)

Got my stock 99 5.3 LS in the car, got 90% of the harness gone through besides the +12v etc and fuse/relay block. I'm going to run the stock ECM with probably HPT pro and I picked up a innovate PSB-1 boost/WB02 gauge to replace my LC-1 mainly for boost readings and fail safes. Motor also has a torque storm centrifugal super charger ready to go on and plan to run about 10psi with a 1 bar OP system.

I want to use the PSB-1 to control the fail safe of the ECM if I have a lean or over boost situation. Thinking the relay control of the PSB-1 could cut power to the injectors and stop fuel? What is the best way to control the ECM with the PSB-1 to utilize the fail safes?

I'm open to ideas or how to even do it?

customblackbird

iTrader: (2)

No one has any input?

The highlander

easiest way is to use a lingenfelter box and wire the rpm limiter to that output
Custom OS works great for this feature too.

customblackbird

iTrader: (2)

Thanks for your input. I'm not going to be buying anything else tho. Basically just need to work with what I got.

I need to look at the instructions again for the innovate PSB1 and see if the relay it controls is a ground or a 12v with the relay. I could just use the PSB1 to activate the injector relay so once it cuts ground or 12v it would kill the injectors and theirs my fail safe.

MontecarloDrag

iTrader: (3)

Stock PCM doesn't have that ability because there are no inputs you can use for that.
The only way to do it is to wire a relay to the IAT wire, it has some tables you can use but they are limited.

Cutting power to all injectors at once may result in a dangerous situation since the engine will completely die, you will lose steering pressure and brake assist. Bad idea IMO. It's better to cut half of injectors 2 each bank, it will lose power and boost.

customblackbird

iTrader: (2)

I just got my HPT pro today. I don't need to use the stock ECM to control the fail safe. That's a good idea to cut 1/2 the injectors. I guess I could wire 4 each per relay and use the PSB1 to control the 1 relay. I went over the instructions again and it's normally closed and opens the circuit when triggered. So it will provide power to the injector relay till its outside the peramiters and will then cut the 12v trigger this killing the 4 injectors.

Any idea on what 4 injectors would be best to disable? Any Pistons that don't run inherently lean? I'd rather cut fuel to the ones that aren't as lean as the others.

MontecarloDrag

iTrader: (3)

Cutting power to the injector will cause a complete misfire, not a lean condition. There will not be any fuel in the cylinder so it's safe by all means.
You can cut power to the same cylinders as DOD does, IIRC 1,4,6,7 so it's not too rough. You will notice the loss of power, the boost will go down. I think it's enough of a safety

customblackbird

iTrader: (2)

Thanks! That works for me! Appreciate it.

G Atsma

Steering ECU???

JoeNova

Wait for it....

Chathuranga De Silva

Im sorry, wrong thread. Deleted it.

G Atsma

Didn't have to wait long.... wanted to see if he was a troll... NOPE! lol