Anything to do with the mechanical aspect of your Megane should go here. i.e. Induction Kits, Turbos, LSD's etc. Mon, 13 Apr 2026 15:38:42 +0000 Mon, 13 Apr 2026 15:38:42 +0000 RSMegane.com https://rsmegane.com/forums/mechanical-engine-gearbox-exhaust-etc.20/ Wed, 08 Apr 2026 12:43:14 +0000 https://rsmegane.com/threads/engine-loom-schematic.23660/ https://rsmegane.com/threads/engine-loom-schematic.23660/ invalid@example.com (hooverphonique) hooverphonique
my 20212 250 has thrown a P0340 (cam sensor circuit fault) a couple of times recently (no other codes), and wanting to test the wiring, I looked for an engine loom schematic.

Catcar doesn't seem to have this, so can anyone here advice on somewhere to look this up, or perhaps post the required schematic part for cam sensor to ecu?]]> 18 Sun, 05 Apr 2026 19:59:26 +0000 https://rsmegane.com/threads/oil-catch-tank.4119/ https://rsmegane.com/threads/oil-catch-tank.4119/ invalid@example.com (TimR26) TimR26
Unsure of where to locate it though as there isn't much room with standard battery in engine bay.

Anyone got pics of where they have located their catch tank?]]> 42 Tue, 24 Mar 2026 10:51:01 +0000 https://rsmegane.com/threads/throttle-body-issue-renault-megane-2011-2-0-cvt.24415/ https://rsmegane.com/threads/throttle-body-issue-renault-megane-2011-2-0-cvt.24415/ invalid@example.com (TonnyM) TonnyM
2 days ago, same thing, but this time was more serious, the car would not start at all.

So...

Some guys came and looked at the car, what they did is that they unplugged a sensor from the throttle body then the car...

Throttle Body issue, Renault Megane 2011 2.0 CVT]]> Thu, 05 Mar 2026 14:41:48 +0000 https://rsmegane.com/threads/air-hose-help-please.24409/ https://rsmegane.com/threads/air-hose-help-please.24409/ invalid@example.com (Koci) Koci Thu, 05 Mar 2026 00:00:44 +0000 https://rsmegane.com/threads/megane-rs-3-manual-gearbox-problem.23073/ https://rsmegane.com/threads/megane-rs-3-manual-gearbox-problem.23073/ invalid@example.com (manel gomez) manel gomez , first of all say hello and thank you for being able to participate in this forum. Secondly, comment that I am the owner of a megane rs 3, and recently I have had problems with the gearbox, basically from 100km/h fifth gear does not engage, the lever remains in the fifth gear position but does not engage. Below 100km/h everything is normal.... (gearbox PK4018
It is a car that I do not mistreat, I take great care of it, it has 120,000 km and I am desperate, I...

megane rs 3 manual gearbox problem]]> 4 Mon, 02 Mar 2026 15:17:25 +0000 https://rsmegane.com/threads/250-cup-lsd-sound.24406/ https://rsmegane.com/threads/250-cup-lsd-sound.24406/ invalid@example.com (Radminas) Radminas 1 Tue, 27 Jan 2026 19:24:09 +0000 https://rsmegane.com/threads/idle-problems-after-rebuild-225.24399/ https://rsmegane.com/threads/idle-problems-after-rebuild-225.24399/ invalid@example.com (Segio) Segio
I've done a full engine rebuild, with the internals stock except for the oversized pistons. After the rebuild, i fitted the engine in the car with a full 3" decat line, and the car doesn't keep in a regular idle, it varies continuously. I've checked all the vacum lines (they're fine) and changed the throttle body an did the basic settings, checked the...

Idle problems after rebuild 225]]> 4 Sun, 25 Jan 2026 16:15:23 +0000 https://rsmegane.com/threads/time-for-a-total-overhaul.24216/ https://rsmegane.com/threads/time-for-a-total-overhaul.24216/ invalid@example.com (Filo) Filo Is anyone interested in seeing what a worn-out engine looks like after more than 350,000 km? This incredible machine has never stopped. From the very first day, it was driven quite fast and under full load. On the other hand, it was taken care of and cherished like a pet. Now, the time has come to either throw it away or repair it and refine it in detail. I don't think I can throw it away. I've been waiting for another sports car for everyday use, but that just hasn't...

Time for a total overhaul.]]> 8 Mon, 19 Jan 2026 04:12:15 +0000 https://rsmegane.com/threads/rough-bumpy-start-up-before-idle.24395/ https://rsmegane.com/threads/rough-bumpy-start-up-before-idle.24395/ invalid@example.com (Dylans265) Dylans265 I’ve recently bought a 2015 265 Cup (my second 265 I’ve owned), and of course, I’m loving it.
However, over the past few weeks I’ve noticed start ups on a warm engine get increasingly rougher/bumpier.
The initial start up is fine, however as soon as the car attempts to settle into an idle, it will quite roughly ‘cough and splutter’, into life for about 20-30 seconds, before eventually settling into a comfortable idle. The car drives perfectly otherwise.
I think...

Rough/Bumpy start up before idle]]> Sun, 04 Jan 2026 16:52:44 +0000 https://rsmegane.com/threads/megane-3-rs-misfire-in-cylinder-2.23866/ https://rsmegane.com/threads/megane-3-rs-misfire-in-cylinder-2.23866/ invalid@example.com (Vladislav) Vladislav
Megane 3 RS Misfire in cylinder 2]]> 4 Wed, 31 Dec 2025 15:37:20 +0000 https://rsmegane.com/threads/megane-3-rs-cup-forge-blow-off-valve-leak.24383/ https://rsmegane.com/threads/megane-3-rs-cup-forge-blow-off-valve-leak.24383/ invalid@example.com (BMH) BMH
I installed a forge blow off valve, specifically this one;
https://www.forgemotorsport.co.uk/Blow_Off_Valve_for_Renault_Megane_RS250265275--product--786.html

The valve works fine when releasing the throttle but when I accelerate steadily I hear a hissing noise like something is sucking air in or out i dont really know, potential boost leak? Also the car doesn't want to pull in 3rd gear sometimes (only 3rd gear) like it pulls for a second then dies and then accelerates...

Megane 3 RS Cup Forge Blow off Valve leak]]> Sat, 20 Dec 2025 14:14:47 +0000 https://rsmegane.com/threads/high-oil-consumption-on-one-cylinder-mk3-265.24381/ https://rsmegane.com/threads/high-oil-consumption-on-one-cylinder-mk3-265.24381/ invalid@example.com (Bezi) Bezi
I had the car back for a few days, did about 300km and noticed that my engine drinks a lot of oil. I had to top it up twice, with a total of 1.5L, which is about half a liter per 100km.

We took out the spark plugs and noticed that the spark plug on cylinder 4...

High oil consumption on one cylinder - mk3 265]]> 1 Mon, 15 Dec 2025 08:39:33 +0000 https://rsmegane.com/threads/check-injection-system-p2263.21989/ https://rsmegane.com/threads/check-injection-system-p2263.21989/ invalid@example.com (D7DPJ) D7DPJ
I believe the check injection system error message and code P2263 are fairly generic warnings. Ive read as much as I could find but not really getting any potential answers.

So about a week back this code first showed, it was after testing my newly fitting brakes and suspension on a very hot day and a pretty demanding drive. No issues with the car, performing well but this light was on.

Using the Torque app which wouldnt read the codes but clear this...

Check injection system - P2263]]> 10 Fri, 12 Dec 2025 14:19:28 +0000 https://rsmegane.com/threads/weird-howling-noises.24379/ https://rsmegane.com/threads/weird-howling-noises.24379/ invalid@example.com (RDenv173) RDenv173 Just posting here to have your opinions on the noise (howling?) my car's been making for the last few weeks as the engine revs up.

• This howling has been gradually getting louder
• The sound appears at around 1,300 rpm and gets louder as the engine revs higher, but seems to be completely covered by the "normal" turbo whistling past 2,100 rpm

I have an appointment with the mechanic on monday, but I would like to know if this is...

Weird howling noises]]> Fri, 05 Dec 2025 21:27:12 +0000 https://rsmegane.com/threads/engine-boring-assistance.24377/ https://rsmegane.com/threads/engine-boring-assistance.24377/ invalid@example.com (Josh Roberts) Josh Roberts
Earlier in the year I bought an immaculate 2015 275 Trophy.

I was recently unfortunate enough to experience compression loss in cylinder 1 at only 22,000 miles.

I am yet to pull the engine out and apart to properly assess damage but from what I've seen using a camera is that there is visible scarring on the inside of the cylinder noticeable by change in colour and the original boring pattern having been scraped away and replaced with marks from piston stroke motion. The piston...

Engine Boring Assistance]]> 3 Wed, 03 Dec 2025 04:51:16 +0000 https://rsmegane.com/threads/odd-noise.24375/ https://rsmegane.com/threads/odd-noise.24375/ invalid@example.com (Macythemeg) Macythemeg https://youtube.com/shorts/9o6G1t1uXK8?si=DDwUYJ7t2nWJaclE it only does it once warmed up and doesn't do it when cold,(the squelching pulsating noise) no leaks other than an oil leak but that just means it has some, I do have it booked into for beaniesport to have a gander but ideally Id like to know before I go into them just so I'm prepared for the cost.

Also the passenger ball joint decided to die at the exact same time could...

Odd noise]]> 1 Mon, 01 Dec 2025 14:46:55 +0000 https://rsmegane.com/threads/a-c-compressor-clutch-bearing.24376/ https://rsmegane.com/threads/a-c-compressor-clutch-bearing.24376/ invalid@example.com (Sgard) Sgard
Has anyone experienced a noisy bearing on the A/C compressor clutch when you first start the car?

It goes away once some heat has got into the bearing.

Also would anyone happen to know the correct part or part number for a 2007 Megane 225?

Autodoc comes up with a whole list of different varients for my model, can't figure out which is correct - https://www.autodoc.co.uk/car-parts...megane-ii-bm0-1-cm0-1/18081-2-0-renault-sport

Thanks]]> Sat, 22 Nov 2025 16:40:50 +0000 https://rsmegane.com/threads/strange-noise.24372/ https://rsmegane.com/threads/strange-noise.24372/ invalid@example.com (Koci) Koci
https://youtube.com/shorts/hd8IBkGcft0?si=VOeDocCATmb9lBY9]]> Sun, 16 Nov 2025 00:44:00 +0000 https://rsmegane.com/threads/how-to-clutch-damper-replacement-airbox-removal-battery-box.24354/ https://rsmegane.com/threads/how-to-clutch-damper-replacement-airbox-removal-battery-box.24354/ invalid@example.com (MarshallH) MarshallH
How to: clutch damper replacement/airbox removal/battery box]]> Sat, 15 Nov 2025 10:58:39 +0000 https://rsmegane.com/threads/225-f1-fueling.24349/ https://rsmegane.com/threads/225-f1-fueling.24349/ invalid@example.com (Reezo) Reezo I have done research but would like to get real life experience from asking...what is the safe margin for stock injectors and stock fuel pump on the 225/R26 when modding? Basically what is the limit one can push on power with 15T turbo/16T hybrid, intercooler, intake, stock fuel pump and injectors and a decent tune before the stock fuel pump and injectors max out. Obviously I wouldnt want to max them out but try to keep them at their highest point but also safe to a large extent....

225/F1 fueling]]> 3