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Author Topic: Me3.8 AEB, bad RPM reading after 6200  (Read 2940 times)
BlackT
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« on: October 08, 2020, 04:14:01 AM »

I have really strange problem on AEB engine. Car was working normal in past. All is stock,now problem is car won't rev over 6200, it doesen't have standard fuel cut rev limiter. It have something like ignition cut( it is logic, beacuse RPM readings are bad)
If i put that ECU on second car it revs normal,and have normal fuel cut.
I try to change everything, harness, coils, POS, injectors, Crank sensor, cam sensor,MAF . Cleaned and retighten all grounds, checked wirings. what ever I try problem still exist
The car is starting and driving normaly till that RPM, no DTC

Any idea what can cause this? Last hope is maybe damaged crank gear, what I doubt it is

In log you can see, when RPM reach 6200 it spikes to 7000 RPM. That where problem is happening
Second log if i put that ECU in second car it revs normal
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