The 7M Stinger Thread

[hottscennessey]

I jumpered the two wires in the harness as your pinout said, and that seems to be working great. The problem is the FC is carrying 12v's for some reason? I unooked the E01 and E02 to make certain that thats where the 12v's were comming from. Am I missing something, because I thought the FC was not supposed to have any charge as it is waiting for output from the ECU?

EDIT: FAWWK I didn't have the grounds for the wiring harness bolted to the intake manifold. That should do it.. we'll see in the morning.

 

[hottscennessey]

Ok, I think everything is straight now.. I just wanted to make positive that the FP is supposed to turn on with the ignition in the "On" position.

 

[IJ.]

FP should be momentary ie: 2>4 seconds then it looks for an ignition event to keep running.

This way if you crash and the motor stops so does the pump.

Will probably be a setting like "Initial activation"

 

[hottscennessey]

Thanks IJ, I gotcha, unfortunately that is not the case . This is without the stinger even connected tho.

 

[IJ.]

Stock ECU should do the same thing!

 

[hottscennessey]

This is without any ECU connected at all. Does the cut off relay look for the CPS output or does the ECU? It seems to me since it's permanently grounded that this should be done by the relay, correct?

BTW: I swear I'm not stupid, just stumped.

 

[IJ.]

Sounds like someone has "fixed" it there Hott!

 

[hottscennessey]

Wait.. maybe not. I just plugged in the stinger.. turned it to 'On' and walah' no fuel pump turning on. I unplug the stinger, and of course the FP turns on. So maybe everythings okay.. I just need to set it up in the stinger's aux output now (which I can't do b/c I dont have a laptop with a com port right now or an adapter).

Edit:
ECU Controls the cut off relay- The Stinger will need to be setup to ground it via FC. At least that is my understanding.

according to JJ:

The second coil in the COR is powered by the EFI fuse. As mentioned above this fuse has 12 volts all the time. The ground to this second coil is supplied by output FC (fuel control) from the ECU. When the ECU detects CPS signals it grounds FC. This keeps the COR closed and the fuel pump running when the IGN key is released from the start position. The entire point of returning control of the fuel pump to the ECU after start is so the TCCS can shut the pump off when the engine stops running after a collision.

 

[bigaaron]

You need to wire up a bosch relay in place of the stock relay. The relay will be controlled by the standalone to turn the pump on and off. A aux output from the standalone should be set to "fuel pump". THe output will turn on for 5 seconds every time the ecu is powered up, then it shuts off until it sees crank trigger movement. If the engine stalls the pump will turn off. I'll take a look at how I did it and post the pinout tomorrow.

 

[hottscennessey]

Thanks Aaron that will be great, will a 30A bosch relay be large enough?

 

[IJ.]

Easily!

 

[hottscennessey]

Great, thanks Ian.

 

[hottscennessey]

Aaron, in the ECU pinout you mention unpluging the fuel pump resistor (the one that give the FP 9 volts on the stock ecu). Is that accurate? I never had any problems with my fuel pump wiring in the past. by chance did you mean bypass the fuel pump resistor? Just unplugging it will leave an open circuit, and I doubt thats what is wrong, but I'm just trying to figure it out.

Edit: nope, not that either. When I jumpered the two resister wires the fuel pump cut on with the stinger plugged in, and it stayed on. Is it possible the only reason this isn't working is becasue I havn't been able to setup the stinger with my computer?

 

[hottscennessey]

BUMP..

I *think* I've got everything figured out for the FP relay.

I've got another problem. When I turn on the ignition it says the engine is moving at 493 RPM's. The engine isn't moving..

 

[bigaaron]

IDK how the tach would be showing rpm when there is no cps movement.

Here's what to do on the fp relay.

Cut the connector off of the stock fuel pump relay leaving long enough wires on the connector to work with. The red wire goes to pins 30 and 85 on the Bosch relay. The white/black goes to pin 86. The black/yellow goes to pin 87. The blue wire does not connect to the relay. The relay will now be switched from the Stinger aux output to turn on the fuel pump, no resistor will be used.

 

[figgie]

1N4001 diodes would work just fine. Anything 500ma or higher and 50v or higher.

I'll post what I had done so far, but I made a few changes at the end that I didn't keep track of. The problem is that I really spent a lot of time on this whole Stinger thing, and I saw there was another competitors website to ours, undercutting us on the price trying to cash in on my hard work. The only thing I ask is that if you buy an EMS Stinger for your Supra, buy it from Driftmotion.

wow that is screwed up!



I got an observation (not re the diodes or anything of that nature)

If you guys are ditching the stock ECU to go aftermarket. Why not ditch the stock ignition at the same time? If it works.... The thing is with an aftermarket ECU you ahve OPTIONS. Easy options to since the dwell on most ecu can be calculated.

 

[hottscennessey]

Figgie- You're absolutely right, thats the beauty of this setup.. I just want to get it running first.

OKAY, I got everything straight with the CPS, I completely re-wired it and that did the trick! Now the fuel pump purge is working as it's supposed to! It is working with the stock FP relay.. I didn't have to wire in the Bocsh relay (I will later anyways), the CPS was causing the problems.

onward I'll go..

 

[bigaaron]

Make sure you unplug the resistor though, you want only on or off.

 

[hottscennessey]

yea, definately. I unpluged it and didn't connect the open terminals. I completely understand the connection now (10 hours with a multimeter and diagrams will do it, I guess). Thanks for the 50th time Aaron!

 

[hottscennessey]

Okay, so I tried starting the car, with the ignition and fuel maps that were pre-loaded, and just crossed my fingers. No such luck. I was just wondering if the included map was for a stock 7M, or for a 1JZ, or what. I was also wondering if the CPS settings would have to be changed.


I noticed earlier in this thread that you may have made changes to the CPS wiring since your spreadsheet, would that maybe make a difference?