Thp remap

[lufc_lad]

It must be pretty safe to do though as they have got 207bhp out of it for the DS3 Racing and i've read that the concept for the DS4 R is the same 1.6 engine producing 252 bhp.

It must have the capacity to cope with more power.

[Chris_Blue]

It must be pretty safe to do though as they have got 207bhp out of it for the DS3 Racing and i've read that the concept for the DS4 R is the same 1.6 engine producing 252 bhp.

It must have the capacity to cope with more power.

Not so sure myself- the racing engine is built a bit differently so i have been led to believe although its the same BASIC engine
Thats why the majority of THPs that have had issues- when you look into it- have been Mechmodded up!
Only my opinion obviuosly
CBLUE

[wg tuning]

any of you guys had issues in lancashire?

[Dangerousfish]

any of you guys had issues in lancashire?

THP Engine blowing up? Yup.

Mine went after 8k miles.

[Raain]

13k KM, no issues yet !

[THE_EGG]

From what i've read and seen, the THP engine problems are mostly caused by bad spark plugs. Simple fix is just to buy new, performance (iridium or the like) spark plugs. Cheap and may also give a small performance boost.

[Jonbays]

From what i've read and seen, the THP engine problems are mostly caused by bad spark plugs. Simple fix is just to buy new, performance (iridium or the like) spark plugs. Cheap and may also give a small performance boost.

Well I think it's not that simple at all. I don't claim to be an expert at all but I think the THP engine problems from detonation the pinging or pinking noise you hear at high load at low revs when cold seems to be the problem which can be caused by poor plugs but more likely by the fact this is a direct injection engine with PCV system that meets the latest emission standards at the cost of longevity. The PCV system appears to be loading one cylinder with oil vapours that causes detonation from lowering the effective octane or glowing carbonisation around the valves not quite sure which. There is also an early model issue with the lack of proper keying of the crank cam gear and the more general poorer quality cam chain sourcing meaning at high load and low revs again you can get cam angle sensor issues with the VVT system casuing hesitation and then the ECU overcorrecting and reatrding engine performance. Quality plugs are always a good investment but is it a cure? I think not. I would say that the PCV delete mod used in the DS4 and RCZ, an oil catch can and the best quality timing chain true BMW spec would be more likley to prevent problems occuring.

[gar074]

Well I think it's not that simple at all. I don't claim to be an expert at all but I think the THP engine problems from detonation the pinging or pinking noise you hear at high load at low revs when cold seems to be the problem which can be caused by poor plugs but more likely by the fact this is a direct injection engine with PCV system that meets the latest emission standards at the cost of longevity. The PCV system appears to be loading one cylinder with oil vapours that causes detonation from lowering the effective octane or glowing carbonisation around the valves not quite sure which. There is also an early model issue with the lack of proper keying of the crank cam gear and the more general poorer quality cam chain sourcing meaning at high load and low revs again you can get cam angle sensor issues with the VVT system casuing hesitation and then the ECU overcorrecting and reatrding engine performance. Quality plugs are always a good investment but is it a cure? I think not. I would say that the PCV delete mod used in the DS4 and RCZ, an oil catch can and the best quality timing chain true BMW spec would be more likley to prevent problems occuring.

Very good summary of the main THP problems, although not the full extent of them. Mine had the timing chain, tensioner and pulleys replaced, and then needed a new VVT unit before it ran properly. Still not 100% after 7 trips to the menders.

Does anyone have any experience of the THP in the RCZ 200? Does it blow up like the DS3R seems to do?

[THE_EGG]

Well I think it's not that simple at all. I don't claim to be an expert at all but I think the THP engine problems from detonation the pinging or pinking noise you hear at high load at low revs when cold seems to be the problem which can be caused by poor plugs but more likely by the fact this is a direct injection engine with PCV system that meets the latest emission standards at the cost of longevity. The PCV system appears to be loading one cylinder with oil vapours that causes detonation from lowering the effective octane or glowing carbonisation around the valves not quite sure which. There is also an early model issue with the lack of proper keying of the crank cam gear and the more general poorer quality cam chain sourcing meaning at high load and low revs again you can get cam angle sensor issues with the VVT system casuing hesitation and then the ECU overcorrecting and reatrding engine performance. Quality plugs are always a good investment but is it a cure? I think not. I would say that the PCV delete mod used in the DS4 and RCZ, an oil catch can and the best quality timing chain true BMW spec would be more likley to prevent problems occuring.

I didn't say that spark plugs caused all the problems...All I said was that they could be a major factor in the engine problems. Also I didn't mean that buying new spark plugs would simply fix every problem associated with the THP engine. Sorry if you read it like that though.

I was going off information I was told by two other DSport THP owners I see on a daily basis as I do not personally own a THP, and also the (although I hate to say it, because I would usually take their advice with a grain of salt) but a local dealership mechanic.

Although one owner did talk about replacing the timing chain and pulleys as gar074 said. But both seemed to agree with each other that the spark plugs could be a contributing factor.

[gar074]

both seemed to agree with each other that the spark plugs could be a contributing factor.

It's certainly worth a try. Back in the day, before direct injection, turbochargers, ECUs, computerised diagnostics, etc, the sage advice with any ailing engine was always to do the simple things first - air filter, plugs, points, HT leads etc - before moving on to the more expensive bits. These days, when anything goes wrong, it always seems to be the expensive bits that are at fault. I can't remember the last time I had the plugs changed on a modern car.

Everything went t*ts up when they introduced electronic fault diagnosis, and technicians lost the ability to look and listen to an engine, & work out what was wrong by drawing on their experience and by applying some common sense. Now they just read the fault codes, look them up on the system, and start swapping expensive components without stopping to think whether there might be a simpler explanation for the fault. Like the muppet from Fiat, quite a few years ago now, who was convinced that I needed a whole new ignition system when the problem was just a couple of knackered HT leads. I only managed to convince him by lifting the bonnet after dark during a rainstorm. It was like the 4th of July under there!

So, as you say. the plugs are a relatively inexpensive fix, and definitely worth a try!