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mg_tf
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Discussion Starter · #1 ·
A bit of a strange question I know, but would anyone happen to know if the VVC engine loom is the same for a post and pre MEMS3 ecus?

I suspect they are different because I think the MEMS 3 has an extra sensor in the exhaust manifold although it possible it's not part of the actual engine loom. As far as I can tell, the engine loom seperates from the rest of the loom for the windows, lights ecu connections etc

The EPC just lists loads of different part numbers for the same loom with no indication what the differences are (if any). I'm assuming you can get a MGF VVC with the MEMS3 ecu?

Any help would be greatly appreciated before I start buying the wrong bits!
 

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The ECU connections are certainly different. The EU2 cars have a single large connector but EU3 cars have 2 connectors, a large one and a small one.

So you need and EU2 loom and ECU, or and EU3 loom and EU3 ECU, you cant mix and match looms and ECU's.

As to if an EU3 engine loom will plug into and EU2 main car harness, I'll have to say pass, as I don't know.

Also EU3 cars use top mounted coils, whereas EU2 VVC's have the coils mounted on the side of the engine, so there are differences with the ignition systems too.
 

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mg_tf
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Discussion Starter · #3 ·
Hi Sharky,

I knew you wouldn't let me down ;)

Perhaps if I explain what I'm trying to do it might be simpler? I've currently got a MEMS3 1.6 TF and I want to put a 160 engine in there instead - I know that I need to change the loom to facilitate the vvc connectors but not sure if I can get just any VVC engine loom to put in or it has to be from a MEMS3 model..... or more importantly how I can actually tell the difference! The actual engine part of the loom seems to be seperate and connects to the main loom.

I also thought I might have a play and see if I can get the vvc mechs running on the 1.6 before taking it out just to see how if it's actually possible and how it runs.... But of course I still need the engine loom! I know I'm going to have ecu/mapping problems ect but while I've got all the bits it might be interesting....
 

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I don't believe the VVC mechanisms will run off the 1.6 ECU as the ECU doesn't have the correct software needed to control the mechanisms. The ECU also wont have the pin outs for the VVC control, so I'm 99% sure plugging a MEMS3 VVC harness into the 1.6 ECU wont work. What you need is a MEMS3 VVC ECU as well and the MEMS3 engine loom. The VVC ECU will then need re-coding to match the security ECU so that you can disarm the immobiliser.
You also need to consider that the car will become modified if the VVC engine is fitted, which could have insurance as well as resale value implications.

TBO unless there is something very special about your 115 then I would consider selling it and buying a 160 and it should prove a much cheaper option. You will also then get all the other improved parts the TF160 has such as the oil/water cooler, improved brakes etc as well as a rev counter with a red line int he right place ;)
 

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mg_tf
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Discussion Starter · #5 ·
It's more a project to get going - not too bothered about the insurance implications etc because the 160 engine will be modified before going in so will need specialist insurance anyway :)

Sorry, I wasn't clear - I meant running the 1.6 on the 160VVC map, I know the standard map wouldn't know what to do with the VVC mechs if even if it runs! My current plan is to get the ecu and immobiliser out of a 160 although I may well go down the Emerald route..... my biggest questionmark at the moment is sorting out the loom

I have the other uprated bits and pieces from the 160 on already, I don't think I'll need the rev counter, I'll know when to change gear when it bounces off the limiter ;)
 
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