Syvecs Forums

stevieturbo wrote: Sat May 10, 2025 6:37 pm https://www.youtube.com/watch?v=GpypHnDeijc

Went to watch this and it looks like I was already half way through it (YouTube remembers...)

By Jove, I think I have cracked it!

I had the TBV RSO (Open) and RSC (Closed) wired backwards...

I rigged up a spare connector to the TBV and put 12V down the open channel and the car ran fine. Stuck the ECU connector back in, and it kept cutting out.

Traced the wires, and found them to be ...

Just checked again with a few extra gauges displayed and it looks like idle control is off. Not sure what conditions need to be met for it to come on.

I'll check again. I think I changed it but I've slept since then.

Attached the sync logs.

On one the engine started then stopped.

The other is a longer run.

It also blew through a wastegate gasket and oil came out the hole. I've replaced the gasket but there is still smoke from the exhaust when it runs.


I've compression tested it and get a good 150psi in all four pots.

It's been a while, but I have been working through what else could be wrong.

Turns out that the iat was melted, presumably from one of the misfires, and reading -40degC.

I'd also forgotten to connect the knock sensor.

There was also an issue with one of the Cop connections.

All of those are ...

Cheers, I'm going to take that advice and not change anything until I've checked other possible causes.

I've tried switching the the green and white wire from the cam sensor which just moves the can signal by 180 degrees, I've also tried connecting both the white and green wires together, but that ...

So I decided to try the engine out and it won't start without me manually opening the throttle.

When it does start, it runs lumpy and won't stay running.

Here is the log from that:

https://i.ibb.co/5hTL5rkc/Running-Sync-Log.png

And a close up of where it lost sync:

https://i.ibb.co/yFnSxxJy ...

Yes the crank has a missing tooth, that's good. Yes green lines are good, although it does not appear to be into 720sync


What are you looking at that tells you if it gets into 720 sync?

Is it likely to start without achieving 720 sync?


The way it's wired looks like crank will end up falling ...