I just pulled out the factory 305 and replaced it with A carbed 350. During the computer removal I was going to remove the chip and guess what-it broke. Well, now that everything is in and together the vats will not let the car start. I can jump a hot wire from the starter solonoid to the battery and the starter will engage but no fuel pump, etc. I tried the resistor deal in the tech section and that did not work at all. What can I do? I don't need the computer for anything, so what can I do?

 

That computer does more than what you know. As of right now you need it to pump fuel to your motor. Depending on the year of it as well all your instrument gauges run off of it. Your torque convertor is not going to lock up either with a carb motor. My friend did the same thing and had to hard wire a switch to lock it when going down the road. Its fairly simple to do. Technically you can go around the computer for motor applications, but gauges no, unless you replace them with real ones instead of the dash cluster ****. If you want it to pump fuel hard wire that sob from a switch as well as the starter. Hope this helps you.

 

There is a relay on the driver side behind the kick panel. You need to jump the contact pins on the relay plug. That is the starter enable relay, it is simply a relay in series with the starter solenoid that turns on when the VATS recognizes the correct PASS key. Secondly you need to wire the fuel pump relay to turn on and off with the key. You are lucky it's not injected since the VATS disables fuel injector pulses also. Try www.technicalevolution.com, Ken has an article for 700-R4 operation in non ECM vehicles. MM is correct, the torque converter will not lock without info from the VSS processed by the ECM.

 

Got it fixed. I put the computer back in an got a chip from tbichips.com (thanks brian) that will work for my application. My cousin brought home his vats computer, (he works at gm dealership) and we got the code from the vats and got it to fire right up. Thanks for all you guys help. So even with the carb setup, if I leave the computer in will it still run the torque convertor lockup?

 

Sorry friend, but no not with the carb setup will it work. I really dont know how it works, perhaps something with the distributor and knowing at what rpm it is. I do know this however, my friend has a carb motor and it didnt lock up for him until he installed a switch, which can be hooked up through the diagnositic port (under the drivers dash) which grounds that wire and locks it up. I have a cable speedometer and when the gear broke in the tranny, the lockup wouldnt work just because the speedometer wouldnt! Once I replaced the gear in the tranny and the speedometer was working the lockup started to work as well. Wierd but its all tied together somehow. It wont take long to install that switch and when engaged at low speeds it will act like a manual transmission in a gear too low! haha

 

i completely took out the computer in my 89 formula and every gage worked and it started fine you will have to rewire the fuel pump relay. heres how i did it....on the coil side of the relay, i grounded the ground wire, and hooked the positive to the radio wire so that it turned on with the key. you may want to spice the oil pressure switch wires together. the electric gages are seperate from the computer. you will have to get a 180 degree jet fan switch cause the computer turned on the fans. I just did that swap and everything works fine.

 

also, if you use a relay, you can hook the tcc lockup to realy to the battery, then wire in the forth gear switch to the coil side of the relay and it will lock in forth gear only. that switch is located in the tranny and connects to the same place the lock up connector does.

 

vats has nuthing to do with the transmission function

 

vats dont have any thing to do with the computer either, it just sends a frequency detirmined by the resistance in the key and sends it to pin B6. if its a 50 hertz signal the car will start. if you notice there are 15 chips made for that same ecm number, but when u order any of the chips, you do not have to mention anything about VATS. most Irocs of the same year have the same chip but a different vats key.