182 Engine Shuts off while driving. Electrical Issue?

[Razmann4k]

Should be able to yeah.

If they're all the way against the inside then just bring them out to the middle.

Actually might want to check your brake pedal sensor is adjusted properly too. Can't remember if that can cause the same symptoms. Brake lights should be coming on as soon as you touch the pedal.

Great, feels nice to be able to fix small problems now, knowing all that I do from here on out can only improve on an already good base!

 

[Gus]

As it was a clutch job, have you checked the earth strap on the gearbox is alright and tightly done up.

 

[Razmann4k]

As it was a clutch job, have you checked the earth strap on the gearbox is alright and tightly done up.

Double checked it, loosened it and sanded it and the chassis and gearbox where it touches, made no difference. It really seems the Clutch or brake switch was the problem after all and good clean sorted it out!

 

[Razmann4k]

We further tracked down the issue to the brake switch, if you hold the brakes the RPM drops even if the car is moving at 80kph, if you hold it down for more than 2 seconds the RPM drops all the way to zero and the engine dies. If you let go just before zero, the engine recovers.

We were bleeding the brakes before we dropped the car down and we were quite violent with the pumping, it's possible that damaged the switch.

 

[Razmann4k]

Hi again everyone, managed to catch the bugger in action, bought a new switch and it acts the same way:

 

[Darren S]

Hi again everyone, managed to catch the bugger in action, bought a new switch and it acts the same way:
View attachment 1736093

Curious - why would a brake switch make the engine die?

Is it a fail-safe device?

 

[Matt Cup]

Curious - why would a brake switch make the engine die?

Is it a fail-safe device?

Something to do with the cruise control perhaps?

 

[Razmann4k]

Curious - why would a brake switch make the engine die?

Is it a fail-safe device?

My thoughts exactly...

 

[Darren S]

Something to do with the cruise control perhaps?

Could be.

Mine's been weird for ages. I could switch the limiter on, or the cruise and the orange and green lights would light on the dash accordingly.

However, they did nothing with to affect the car's speed. I had the brake switch swapped as a test a while back and now the limiter works, but I get no green light on the dash when I try to switch on the cruise. The limiter does go orange on the dash and does r****d the car once it hits the set speed.

 

[Razmann4k]

Could be.

Mine's been weird for ages. I could switch the limiter on, or the cruise and the orange and green lights would light on the dash accordingly.

However, they did nothing with to affect the car's speed. I had the brake switch swapped as a test a while back and now the limiter works, but I get no green light on the dash when I try to switch on the cruise. The limiter does go orange on the dash and does r****d the car once it hits the set speed.

It's an intermittent issue, and now the car works fine despite nothing changing. However, it did "fix" itself before and crop up again. I can try and see if the cruise control/speed limiter works, perhaps it's related to that.

However I have another theory, the OBD scanner picked up a fault with the O2 sensor heating circuit, and that can cause under fuelling when you first start it up, and hitting the brakes may cause it to further cut fuel and that causes it to stall.

Why that's possible is that when the issue does pop up and I hit the brakes, the revs fall but if I'm quick enough to release the brakes the engine can catch itself before stalling.


Why the theory isn't 100% confirmed is because I tested it this morning completely cold and it didn't stall when pressing it in.

 

[Darren S]

It's an intermittent issue, and now the car works fine despite nothing changing. However, it did "fix" itself before and crop up again. I can try and see if the cruise control/speed limiter works, perhaps it's related to that.

However I have another theory, the OBD scanner picked up a fault with the O2 sensor heating circuit, and that can cause under fuelling when you first start it up, and hitting the brakes may cause it to further cut fuel and that causes it to stall.

Why that's possible is that when the issue does pop up and I hit the brakes, the revs fall but if I'm quick enough to release the brakes the engine can catch itself before stalling.


Why the theory isn't 100% confirmed is because I tested it this morning completely cold and it didn't stall when pressing it in.

Hmmm - your issue might closely align with mine.

That brake switch was swapped a few months back in an attempt to investigate the cruise control issue. Since then, it can occasionally dip into the idling revs, almost to the point of stalling. It never has, but it does sound related as I never had a issue before.

The Parts Cannon does sound like having a tempting reload - given the fact that they are relatively cheap.

 

[Matt Cup]

Hmmm - your issue might closely align with mine.

That brake switch was swapped a few months back in an attempt to investigate the cruise control issue. Since then, it can occasionally dip into the idling revs, almost to the point of stalling. It never has, but it does sound related as I never had a issue before.

The Parts Cannon does sound like having a tempting reload - given the fact that they are relatively cheap.

View attachment 1736209

Half the price here. I bought this one as my switch didn’t work at all.

Renault Clio MK2 182 Variant2 Febi Mechanical Brake / Stop Pedal Light Switch | eBay

Colour: White. If your Brake Switch fails then this can lead to an instant MOT failure. Key Points. They will guide you through the warranty claim process and provide the necessary assistance. Whether you're in the UK or anywhere else around the world, we've got you covered.

www.ebay.co.uk

 

[Razmann4k]

Hmmm - your issue might closely align with mine.

That brake switch was swapped a few months back in an attempt to investigate the cruise control issue. Since then, it can occasionally dip into the idling revs, almost to the point of stalling. It never has, but it does sound related as I never had a issue before.

The Parts Cannon does sound like having a tempting reload - given the fact that they are relatively cheap.

View attachment 1736209

Hmm, well I bought a Febi switch and that didn't solve it, the plunger is a bit longer on the new Febi switch, I wonder if that makes a difference, but with both the old and new switches the fault unfortunately remained.