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RB25 GTST timing issue

hertzz

By hertzz,
in R Series (R30, R31, R32, R33, R34)

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hertzz Newbie

hertzz

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Hi all,

Haven't posted on here before, so hopefully this is the right section!

Recently I encountered a problem where my R33 would not start. The engine cranks, but it will not catch and turn over. I checked all the basics: spark plugs were fouled, changed out with new matching plugs with same gap, coils firing, injectors pulsing, getting fuel, no cooling pipe leaks that I can see or hear. Eventually I had someone come round and the only way we could get the car started was to physically advance the CAS timing slightly and the engine fires right up.

I'm running some light modifications:

  • PowerFC (car has been tuned etc..)
  • GTX3076r Turbo
  • 740cc injectors
  • Z32 AFM
  • Walbro pump (not sure which one)
  • LS1 coilpacks (direct on coil incl. igniter)

Once the car is idling with the timing advanced slightly, the powerFC is showing 20 degrees, with my base ignition timing being 15 degrees originally. The maps and settings on ECU have not been changed since it was tuned several years ago and has run perfectly fine for years, so I'm wondering if I'm most likely looking at an issue with timing belt jumping some teeth?

Any insight would be great! I don't have a timing light at the moment and wanted to see what some thoughts were before trying to start working out how to verify alignment of everything.

Cheers!

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https://www.sau.com.au/forums/topic/472948-rb25-gtst-timing-issue/
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hertzz Newbie

hertzz

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Posted

Thanks Odium :P

 

Yeah, timing was definitely off after checking with timing gun. Turns out, the harmonic balancer was loose and there's significant damage to the keyway/crank from excess play over time. My mechanic is hestitant to do any type of repair work and is straight up recommending a reconditioned engine. What do you think would be my best course of action in this situation?

I am looking to get rid of the car as I don't have the time or money to invest more into it. Might have to look into parting out all the aftermarket stuff on the forums :(

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