Okay so I got this weird timing problem on two zeds and I'm hoping someone can help me out as I've never come across this before. What's happening is that when checking the timing of either car, it shows a really high reading (like 30+degrees) when the CAS is in the centre. I can get it back to 15, but the CAS position is at max retard. I initially thought it was the harmonic balancer shearing the key until I checked dad's and was doing the same thing. It's not the cts as I checked it on ecu talk (no error codes at all), I'm only checking when warm so there's no advanced timing, both cars have the exact CAS reference when showing 15, 20 , and 25 degrees so I doubt its the balancers as they wouldn't slip the exact same amount, and yes I've used multiple timing lights. The cars run fine when the CAS is in the middle like normal, like no knocking etc, and run like shit when retarded to 15deg. It feels as if there's nothing actually changed in terms of timing, but just the visual indication is wrong :S. Also both cars were definitely showing 15degrees with the CAS in the middle earlier this year. Any help would be great! Cheers.
Timing belt on passenger side cam ? If you have the belt set up wrong on the cam as the cam drives the cas ? Has the cam belt been replaced .
Probably just interferance with the pickup. Use a short spark plug lead between the coilpack and plug, my timing light gives funny results if you don't hold it right
is your TPS reading correct, and does your scan show the ecm to be on idle (throttle closed), once off the idle setting the ecm adds timing you may be just high of the idle setting and getting an ECM modified timing reading. Just a thought.
An auto ECU in a manual car will show 25 degrees of timing at idle, you need to ground the neutral switch wire from the ECU and it should drop back to normal.
Is this true? Can I ask why that works? Why isn't already grounded? How come the tech section doesn't mention anything like this? To the OP: Did it work? What finally resolved this?
