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Lotus Exige 350 Sport – Faulty cam shaft positioner causing rev limiter to kick in at ~4k revs - Engine & Ancillaries/Gearbox - The Lotus Forums - Lotus Community Partner #ForTheOwners Jump to content


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Lotus Exige 350 Sport – Faulty cam shaft positioner causing rev limiter to kick in at ~4k revs


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  • 3 weeks later...

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Hi

I don't know if your problem has been fixed. Just to say a supposed failure can hide something else. Here is my story :

exige 380 2017, bought at 2500 km in a trustfull Lotus dealer in 2018. No problem mentionned, and no problem for a few hundreds of kilometers.

And then, random rev limiter at 3.8/4 k rpm started to make me crazy... The car ran well at full pace on track, but sometimes random rev lights appeared (and rev limiter intervened !) on road during one acceleration, and not the next one...  - like you

Sometimes the MIL light was on, sometimes not... One time, I captured the log fault : P0366 Camshaft Position Sensor B Circuit Range/Performance Bank 1 - sounds similar to your case

Restarting the engine solved the problem eacht time, until next ghost rev limiter...

I made the brake switch changed by a local dealer, but no improvement. I brought back the car to my original dealer. It was a nightmare to diagnose (he said to me 12 hr of work had been necessary, under warranty but Lotus did not pay all of them) and he found the root cause : a bent pin in a connector of the harness... 🙄

Edited by fjc27
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If I remember correctly, before the brake switch, they changed the camshaft position sensor because of the fault code, and it was highly unlikely that there was a real problem with the camshaft...

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