SYNC ERRORS

[kevdachev]

Sorry Sean sent pics too big so have resent them!

[Stephen Dean]

Is that an embedded magnet trigger wheel? It looks like the sensor is also reading the ring.

A falling edge on the Ref and setting the Trigeer Voltage to 1V may work, it depends on whether that bounce increases with engine speed.

[Sean]

Stephen, yes, that's an off the shelf MSD embedded magnet trigger wheel and pickup. Normally used with something like a MSD 7AL. The trigger wheel and the round pins are aluminium.

Kev, the picture of the ECU has answers one question, it appears to be an M800 rather that an M400. Can you post the actual configuration file from the within ecu please.

In my experience, if it was running fine before you've done a freshen up, most often the culprit isn't the ecu. I'd advise verifying the basics, cranking compression, valve lash, fuel pressure, all the basic stuff. With ecu manager open check all the sensor channels and see if the values make sense. If it's not run for a while check injectors are firing and aren't stuck. I'd always recommend a flow check on injectors at rebuild.

[kevdachev]

Sean, Steve sorry about that youre right it is a M800. I am checking everything I can think of. I just cant understand how it can fire and run with the Sync , No Sync errors. If the cam and the crank are in sync how does it run? Im a bit confused!
Kev

[Stephen Dean]

HI,

If you have the view screen open when cranking, the errors are held until reset. This means that the eroors that occur during cranking will remain in place. If you crank the engine with the view screen open, keep pressing the reset errors button to clear the errors, it is only the errors that come back that you have to be concerned with.

[kevdachev]

OK this is all a big learning curve for me. I have altered the timing positions and some of the wiring and cleaned all the sensors. I now have no errors at all. But the engine will still not rev. The lambdas go very lean when I try to rev. It revs to maybe 2500rpm. The fuel pressure is good at tickover and when I try to rev. I dont think 8 injectors would all fail simultaneously. Fuel lines are clear pump is good. Sorry to be a pain but Im stuck with this fault.
Kev

[super7]

Are there reasonable values for the TPS sensor?

[kevdachev]

TPS sensor reads from 2.5% to 100% which I have always had.
Kev

[Stephen Dean]

Does it have enough fuel in the fuel map to run the engine at the higher engine speeds?

[Sean]

Have you verified that the MAP sensor is reading correctly at idle, the numbers make sense, and that it's changing readings as you change revs. Also verify it's connected to correct port on the boost side of the manifold? And check that the fuel pressure reg is connected to the boost side too, assuming you're using a rising rate reg. My instinct says it's a connection issue rather than an ECU problem as such.