Ok so my Lt8 is reading 3 errors wen rev'd above 2500 RPM...
The errors are the following: RPM, HOM, & REF

Could anyone tell me how to trouble shoot these problems?
The trouble shooting steps ive taken are:

Shielded CAS wiring all the way back to the ECU and also ive grounded the stock shielding that comes on the harness.

Regrounded the the engine etc.

Tried several routing ways for the CAS wiring.

Once again if anyone has any advice it be greatly appreciated. Thanx

 

Check the condition of the connectors on the CAS and harness, and replace the CAS if the problem remains.

Your shielding is only grounded at the ECU end, right?

 

I had same errors on my REW swap. I removed the whole cas harness shielded with foil tape and rerouted it.
It fixed the error problem


Johny

 

Thankyou guys very much.
Im going to reroute the CAS harness and shield it with foil tape
clean all connections etc.
I will repost with results tonight. Thanx again...

 

Ok so last night i completely seperated the CAS harness from the main harness.
I cleaned/checked all connections and FOIL wraped the CAS harness.
Re-routed it along the fire wall and strait forward to the CAS.
Reset codes. No luck. Errors still remained
Next i routed it along the passenger strut tower and around front the engine
and again no luck.
I also re attemted the same routing but this time i put it over my turbo and along the top of the hosings where the oil line runs and still no luck.
Also the last attempt i took the belt off so the alt does not run and once again the errors still show.
Im confused and dont understand this problem.
Now instead of it throwing the erros above 2500 rpm it does it when softly reved above idle.

Could I nees a new CAS harness from Microtech?
Is my ECU bad? etc.

Thank oyu guys for your help. Its much aprreciated.

 

Replace the CAS. And if that does not work. Replace the harness.

 

What he said. Sounds like you have a CAS that is going South. You can try to move the reluctors closer to the wheels a little and see if that fixes it. Use a set of feeler gauges or piece of paper to get them as close as possible without hitting.