1990 Corvette ECM

[Kiwibirdman]

I bought a 1990 Corvette from the south Island and drove it up to the North Island over Easter. 

When I got to Levin it refused to turn over or start. After getting it back to Auckland (than you very much AAplus) I have worked out the problem is somewhere in the VATS system.

After spending many hours I have come to the conclusion the best way round this is to remove the VATS completely. The VATS appears to cause all sorts of on going issues.

Does anyone know some bright bugger who knows how to delete VATS off the ECM. Once this is done I can bypass everything else.

[Nominal]

@vk327 might know something? 

[tortron]

Same as commodore? 

I have an eprom writer, adaptors, and UV eraser here

 

https://pcmhacking.net/forums/

[sheepers]

take it to Nick at Ron Wood auto electrical.

hes done heaps of them. 

 

in fact there's two in his yard right now for similar issues. 

[Kiwibirdman]

I spoke to Nick at Ron Wood. He has a man up North who can turn off the VATS. I will get that done and hopefully will work.

 

Thanks to everyone.

[Kiwibirdman]

For anyone who is interested. 

I spoke to the Guy up north. he said he was away and would e ack home after ANZAC day. All good I said txt me your address and I will have the ECM waiting for you. No response to several txt messages and calls.

Next plan was call Peter Church at American Pick up parts. HE was the parts guy at Bunce Motors for many years. He put me on to Carl Jensen at C&M Performance. Had a chart with him and he said no worries, bring it in and I can take the VATS off while you wait. I turned up and he took one look at the ECM and said what year did you say. 1990 was the replay and he said sorry I thought you said 1999. I haven't got a chip burner any more.

He put me on to Dave Green at Specialty Cars in MAtamata. I rang Dve and he said yes I can .... but 1 in 10 chips wont reflash and new chip aren't available. Knowing my luck so far with this car I wasn't prepared to risk it.

My nex stop was a crowd in the US , PCM of NC. The make an interface board that goes between the chip and the main ECM. I fired them off a request asking if they would sent to NZ. No problem was the answer straight back. I order one through their web site late Thursday night. Next morning I get an email back from PCN of NC saying the payment didn't go through and one from the bank saying there was a possible fraudulent transaction on my credit card and it was on hold. 45 minute on the phone to the bank had the hold taken off but the transaction still wouldn't go through. I ended up setting up a pay pal account and paying that way.

Once that was sorted that transaction went through ( Monday just gone) and the new chip arrived Thursday.  I thought that was pretty good from North Carolina. Installed the chip and the car started but ran on about 4 cylinders and super rich. With the shit weather and life being busy I didn't get back to it until today. Got the car running and out of the garage. It wouldn't even make it up my driveway. Check for air leaks and found a few that could be a problem. Still not running right. Though that the only thing that changed was the ECM. Opened it up and checked the new chip. One god press and the clip on one side clicked on. Put it all back together and away it went. 

it still has an intermittent miss that got better as I drove round the block. I think a new set of leads, plugs, fuel filter etc could be in order. 

Happy it is fixed.