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I might be wrong but isn't 14.8-15v on the high side? Should be seeing around 14.4? No idea if this has any bearing on your issue but I had a megane 225 alternator regulator that was faulty and was putting out 15+v and fried the battery.

Noting you said it is already remapped - Perhaps this was done whilst it was slight out of timing and is causing the issue(s)? I'm not clued up on mapping and timing etc... However, when I went to have my 197 mapped, Henk from Fastchip noticed it had already been "mapped" but the timing was...

Just a note too... Use genuine parts where possible. IE Spark plugs - Part number: 8200492426 (HERE or HERE), Coilpacks - Part number 8200568671 (HERE) etc...

New coils and fresh plugs - check and clean PCV, check and clean throttle body. Check/clean lambda sensors - perhaps they are causing incorrect air/fuel ratio due to being faulty (a guess).... What exhaust do you have? Any other modifications? Personally - I would recommend doing the basics...

RSTuner from fastchip.nl. Has been my saving grace for all things Renaultsport (Clio 197 & Megane 225 specifically). Much more than just a scanning tool; Can remap, read and disable airbag(s), brake bleeding etc... All you need is the RSTuner tool and software installed on a basic Windows 10...

Not 100% if this is correct but hopefully it might help - Sorry, I haven't used the VISU diagrams in a few years!

Or use this; It's in French but if you're happy to follow visually, you'll be fine. :)

No worries. It's very straight forward. I think there is a guide on here how to do it but you may need to be a paid member to access that section of the forum.

In this order; Replace the thermostat ASAP - as mentioned above, if the car is constantly adjusting the map (likely running rich) to try and get it up to temp, it'll cause performance issues. I had a busted thermostat and replaced it within 20 minutes, noticeable difference immediately. Get...

Perhaps not relevant but... I have the RSTuner from Fastchip.nl and paid for the EPS module (I have a 197) and it unlocks the ability to read faults + change the steering strategy... https://fastchip.nl/shop/clio/clio-3-products/trw-eps-support-for-clio-3-detail Decent bit of kit (the...

Hi fella, yeah thermostats are common to go on these. It's a simple job to replace but make sure you buy a genuine thermostat as the standard ones are rated slightly higher than the original part (can't recall the correct figures)...

Somebody give @turkie172 a raise holy sh*t.....

Do you have the engine under-covers fitted (or at least, were they in place) when the belt got shredded? If not then it'll be tough to point the finger!

Wheel alignment and tyre balancing can be so underrated at times. Get it done and they'll likely tell you if any of your rods/arms are failing at the same time.

Gander = pull each fuse and relay out and inspect for damage, melted plastic or corrosion. Also any water or humidity within the box. I think it has a rubber-like seal that can perish over time which doesnt help when trying to keep water out of this fuse box!

Have a gander at the fuse box under the bonnet, these can get water ingress and slowly corrode/damage the electrical components which may be the cause here... it's relatively common and if not caught early enough, could result in a new fuse/UHC unit being required!

If your alarm is already popping off randomly then you've nothing to lose by checking the cabling in the rear and on the unit... You have asked for some help/advice and I have given you some things to try and identify what is causing the issue (which cost nothing)... seems a tad pointless...

Remove the boot lining on the left side (if looking into your boot from the rear). The alarm unit/speaker is placed here. You will also find 2 grey cables going to both rear sensors. Check these are in-tact and not broken on either end (sensor end and connection to the alarm unit). The alarm...

My fuel pump failed after hitting a "medium sized" pothole a few years ago. I have read on multiple fuel pump failures and most say it's intermittent and a good whack with the palm of your hand on the fuel tank under the car can sometimes bring the pump back to life. For what it's worth and...

It's difficult to help because you're not local - I just want to jump in and unpick this for a few hours to sort it but I'm pretty sh*t at expressing the methodical/logical troubleshooting when it's not in front of me... if you know what I mean? Haha.... My honest opinion at this point... Send...