2 Months later...
Quite a lot has gone on with the Clio so i will try to compress it as much as i can without leaving out any key events/details.
So starting off from where i left off last time, it turns out the clutch had completely gone/destroyed itself. So, i got this replaced with a standard Valeo unit.
After getting the clutch fitted i decided i wanted to sell the car as my insurance coming up to an end. Plus i was getting some very good insurance quotes on some BMW E39s >£1000. The idea was that i wanted something big, with 5 doors, diesel, automatic and it had to have a high spec. A BMW E39 530d literally ticked all my boxes. I had never had a big car before, i have only ever driven about small, old, rattly & cheap hatchbacks
However, all of this did not go to plan. The car was listed for sale on Gumtree, this was because i just wanted a quick sale and i was still in two minds of whether i should keep or sell the car. After a couple of days of the listing being live, the car began to play up. I should of just took down the advert but instead i just reduced the price. After a lot of time wasters on Gumtree, i finally took down the listing and i decided that i am just going to keep the little Clio and get it fixed properly. In all honesty, i think it was just the complete wrong timing for myself to be selling a car in general.
Misfiring issue was getting worse (again). Our cheap eBay chinese scanner was just bringing up the same code as last time?
However, the lambda sensor was only replaced a couple of months ago which is strange? Something must be causing the lambda sensor to keep malfunctioning? Air leak? Not fueling properly?
A couple of months back, i had purchased a set of new NGK PFR6E-10 3688 spark plugs, some new genuine Renault ignition leads & a second hand coil pack. These were all fitted on the 15-06-2020. Misfiring issue was still present.
Misfiring issue got so bad that i literally couldn't even drive up a steep bank. I had to constantly change up and down the gears etc.
2 days later (17-07-2020) a set of second hand injectors were fitted & the fuel pump was removed from the tank & cleaned. I think it turned out injector 3 was at fault.
18-06-2020: All relays out from under the bonnet, cleaned the terminals, checked wiring and cleaned the earth near the passenger side headlamp.
25-06-2020: Local garage sealed an air leak on the engine. However, they found a crack on the manifold. Maybe this is causing the lambda to malfunction? The car does slightly hunt at idle however the needle doesn't move to be honest? Revs sometimes drop when setting off, have stalled about 5 or so times because of this?