#1
rweasterly
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Member Since: Jul 2006
Location: walker louisiana
vats bypass module 64024 help

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iv got a 92 lt1 vette engine im installing in my c3....first it is on a enging stand.....i have the older 501 painless harness....i "rough" wired/plumbed it with power switches,inline fuel pump return lines test tank and a starter button.etc...i started it up for the first time and it died,,,start die,,start die, etc...... i called painless and the said i needed a vats module #64024..i kinda knew i would need it...but!!!!!...i got one and same thing start die.and....it came in friday afternoon and of crs they are closed till monday....so any help i will be very thankfull....


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Yesterday, 09:14 PM #2
vettehardt
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Member Since: Oct 2003
Location: Lakeville IN


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If you know what vats code you have it is easy to bypass the vats system. First find out the code and then look up the resistance for that chip (can be found on the web). Wire in a resistor with the same resistance and it will never trigger the vats.


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Yesterday, 09:37 PM #3
rweasterly
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My Corvette Photos
Member Since: Jul 2006
Location: walker louisiana


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i thought that the bypass module took care of all that...i have no idea about any codes and know way of knowing how to get them....thanks


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Yesterday, 09:48 PM #4
72LS1Vette
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Member Since: Aug 2001
Location: North Easton Mass

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A lot of the VATS bypass modules have 2 outputs - one for 50 Hz and one for 30 Hz (I think). The 50 Hz is used for LS engines and the 30 Hz is intended for the LT engines. if you have 4 wires on your bypass module make sure you are using the right output. The other 2 connections are for ground and switched power (hot in start and run - normally a pink wire). There should be a wiring diagram or instructions with your bypass module that will tell you how to hook things up.

Edit: since the engine is on a stand just wire the VATS bypass power to the 12V source for testing.



Rick B.


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Last edited by 72LS1Vette; Yesterday at 09:50 PM.

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Yesterday, 09:59 PM #5
rweasterly
CF Senior Member



My Corvette Photos
Member Since: Jul 2006
Location: walker louisiana


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im useing the painless module three wire..and the hot is going to the 5volt like they said in the instructions...thanks again

 

sorry,i had to cut and paste the orig post because it got moved to the c3 side...i guess because i stated i was putting it in a c3....but i would think you guts over on the c4 side would have much more info....please help thanks

 

ttt

 

The 50 hz output should allow the ECM (92)to trigger the injector drivers......if the injectors fire at all you don't have a VATs problem. Selecting the wrong hz output wire won't hurt anything since the voltages are the same...the car just won't run(fire the injectors) unless it sees the correct frequency it is after.

You can also have a chip burned to eliminate the VATS functions all together.....get a tune to match your application while your at it.

Keep in mind that a starting/stalling issue might be another fuel delivery issue other than the VATS.