Irocz_89

I have the 1227165 ECM in my 1989 Camaro 305 TPI. Vats is disabling my injectors from Pulsing when the engine cranks. So before I actually went ahead and bought a prom from TPIparts.net, I was wondering if there was a way I could run a wire from the “B6” DK BL wire coming from the ECM which is the “5V Signal” wire that gets the okay to pulse the injectors from the module straight TO one of the wires from the Ignition switch which has 2 grey wires A&B (Which one of those is the signal & ground?) and doing so will this bypass the VATS Module and send the signal directly to the ECM B6 wire to power the injectors from one of the A&B wires that is on ignition switch?

Tuned Performance

iTrader: (92)

you can bypass the vats or fix the vats three different ways. One is to measure the key resister and assuming the pass key module is good solder the resister in the wiring harness and cut the leads going to the key lock cylinder. Reprogram ot the vats in the eprom reprograming and the last is a bypass module that send the frequency to pin B6

http://www.ebay.com/itm/86-02-Camaro...r#ht_541wt_793

Tuned Performance

iTrader: (92)

better yet.

http://www.ebay.com/itm/GM-VATS-or-P...e276f3&vxp=mtr

Irocz_89

So that's basically saying what I wanted to try(a wire straight from the signal wire on the Ignition Cylinder to the B6 wire on the ECM) will not work.

The Bypass Module does this I'm guessing ---> To signal the ECM that a correct key resistance is sensed, the VATS and PASSKey systems use a grounding square wave at a 30Hz rate. The VATS module uses an NPN output transistor to pull down (ground) the 5 VDC reference voltage presented by the ECM on terminal B6. The reference signal must be alternately grounded and allowed to be pulled up by the ECM internal resistor 30 times per second (30 Hz) and at a 50% duty cycle. This method was selected to prevent the simple powering or grounding of an ECM input to enable the fuel injectors. The signal is only needed during cranking to enable the injectors.

Irocz_89

http://www.ebay.com/itm/GM-VATS-or-P...e276f3&vxp=mtr

That is actually exactly what I need... The only problem is... How the hell do I install it?

Tuned Performance

iTrader: (92)

http://www.xdponline.com/documentati...***_Module.pdf

Irocz_89

VATS bypass module wires:
· Red: 12V ignition of accessories
· White: Fuel enable wire. 50hz or 30hz.
· White: Control wire. Connecting this wire to the Ground will produce Standard Vats Bypass
signal (50hz) on the signal White wire. If this wire is not connected to the ground the White signal
wire will produce older 30 Hz VATS signal used on some 90-93 PCMs
· Black: Ground
VATS

So that's saying, connect the red wire to the ignition 12v wire or an accessory wire that has 12v's running through it.

Then connect the White Fuel Wire (wire adjacent to red wire or closest to red wire) to the B6 wire on the ECM

Then I can connect the control WHITE wire (wire adjacent to black/ground wire or closest to black/ground wire) to the ground wire or just a chassis ground to produce both the 50hz & 30hz signal.

Then Black wire is the chassis ground.

That is how I assume how to hook it up... Is that correct?

Tuned Performance

iTrader: (92)

That's how I read it

vetteoz

iTrader: (13)

You can produce one signal ( wire grounded ) or the other ( wire not grounded )
; not both

Irocz_89

Okay cool thank you! Ordered it and it is on the way. I'll let you guys know how it goes.

Besides that... Would any of you guys happen to know which signal I will need... a 50hz or a 30hz?

Tuned Performance

iTrader: (92)

I would try the 30Hz first !

1badgenesis

what i did on my firebird was i messured the current on the key then i picked up the resistor that matched my key. then the sterio shop told me tolocate a white wire going into the ignition. once i did that i cut the wire then just spliced the wire in n i was good to go. i would suggest soldiering tho