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Discussion Starter · #1 ·
Right before anyone asks i have done a search and couldnt find what i wanted.

Just bought an mg zr vvc 160 (from a private seller)

on the way home i noticed that it is hitting the rev limiter at 5800.

i have read the posts saying it could be a sensor or vvc timing.

is there anyway of telling without reading the ecu?

Also i have checked the plugs on the sensors for the vvc but they may have been the wrong way around.

Does the black plug go on top of the vvc unit, then the brown one, then the blue?

im sure this is how it should be but they were the other way around but swapping them didnt make any difference to the car.

sorry for the long post but im a little upset at the mo
 

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Mmmm....Rover..
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The correct order of connectors, from left to right are;

Black, Brown, Blue.

It could also be caused by a faulty camshaft sensor, this tells the ECU by how much the cams are driven by the VVC mechanism. If this sensor fails the VVC mechanism will be frozen (to avoid damage) and the revs limited.
 

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Somebody has either messed with the connectors or maybe a failed sensor or solenoid.
*Edited so as not to repeat.
 

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Discussion Starter · #6 ·
ouch.

erm, certainly in limp home mode. Any strange noises? knocks?
tell me about it:irked:

it drive really nice other than the lack of revs/power.

i didnt rev it that high on the test drive with the owner sitting next to me
:slap:

Think i will get it fault coded tomorrow and see what happens
 

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Discussion Starter · #7 ·
i have access to another vvc 160 engine.

if i was to swap all of the sensors over (ones for vvc), would it work right away or would the ecu have to have the faults cleared first?
 

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Mmmm....Rover..
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Faults would not have to be cleared first, they are simply logged in the ecu.

Swap one item at a time, this will enable you to confirm what is faulty.

Try the camshaft sensor first, it's on the back of the head to the left of the oil filler cap.

You could also try the two solenoids on the HCU (Brown and Blue plugs) but take note of their orientation and their position relative to each other.

I would be surprised if the oil temp sender was faulty (Black plug) but it's fairly easy to swap over.
 

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Discussion Starter · #9 ·
had thecar at the garage for the past two days

The only fault they are finding at the moment is with the VVC actuator, I took another actuator from a different engine, butit is still the same.

Does anyone know any good places i can take it in essex to get it fixed.

Cheers
Tony
 
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