P0300 Misfire.....Here we go again!

[Trapps84]

All back to normal, unplugged it looked fine... I must of put it back wrong

 

[Sir Nancy Flowers]

Mine still wont start. Any helps lads? Cranks a few times then cuts off itself. I have to turn the key fully back then fully forward for it even to crank.

 

[Trapps84]

Unplug the white one again (under the bonnet lol) make sure all the pins look good then click it back together again make sure it's shut fully

 

[Sir Nancy Flowers]

Unplug the white one again (under the bonnet lol) make sure all the pins look good then click it back together again make sure it's shut fully

Unfortunatly I have tried that already. The pins appear to be fine but its hard to tell as its under all the other fuses.

 

[JamesBryan]

Is your immobiliser light going out?

 

[Sir Nancy Flowers]

Ill go check now.

On a side note, could it be crank position sensor? The more I read about this, the more it makes sense. People have mentioned wiggling the cable when the car wont start. Yesterday, going along a very bumpy road the engine just cut out. Started right back up. Might be adding 2 and 2 and getting 5 but worth a mention.

 

[Sir Nancy Flowers]

SO. Its now like a battlefield on the dash. We have the following ON that wont go off (still not starting): STOP, Immobiliser light, SERV, ABS, Battery, Oil and Handbrake (that is on so probably disregard).

yay.

 

[JamesBryan]

I mentioned the crank sensor before as a possibility.

 

[JamesBryan]

SO. Its now like a battlefield on the dash. We have the following ON that wont go off (still not starting): STOP, Immobiliser light, SERV, ABS, Battery, Oil and Handbrake (that is on so probably disregard).

yay.

Definitely got to be wiring that, no chance all those are on at once.

 

[Sir Nancy Flowers]

I agree. Must be wiring. But what the hell!

All I have done is undo that white connector and put it back again. Its unlikely I have dislodged anything.

 

[JamesBryan]

I agree. Must be wiring. But what the hell!

All I have done is undo that white connector and put it back again. Its unlikely I have dislodged anything.

Try disconnecting the battery for a while.

 

[Sir Nancy Flowers]

Done that. I'll report back in 10.

 

[Sir Nancy Flowers]

She lives! Now to try and work out what the hell caused that 🤣

 

[Sir Nancy Flowers]

Last time I ever spray wd40 into any crevices.

 

[JamesBryan]

It didn't like it, just temperamental.

 

[Sir Nancy Flowers]

It didn't like it, just temperamental.

It really is a tempremental little cow. Its been fine up until recently. Never had these issues before in my now nearly 12 month ownership. Strange isnt it. When it rains it pours I assume!

 

[Sir Nancy Flowers]

Anyway. After that very large segway, I am now going to continue chasing the misfire.

One very strange thing is that the car doesnt throw a code or EML when under load. Only when idling does the car misfire. This has scrambled my brain slightly as if it was an injector, surely it would be misfiring on idle or when under load?

 

[JamesBryan]

When it rains, stay out of puddles 😂

 

[JamesBryan]

Is the EML flashing on idle sometimes?

 

[Sir Nancy Flowers]

Not sometimes. Every time!

 

[JamesBryan]

Not sometimes. Every time!

100% a fuel injector that

 

[Sir Nancy Flowers]

I've been through this debacle before though. Swapping out used injectors seemed to work for a moment and then nothing. I'll give it a go!

 

[JamesBryan]

I've been through this debacle before though. Swapping out used injectors seemed to work for a moment and then nothing. I'll give it a go!

If used ones don't work, just buy 4 new ones.

I've done loads for people over the years.

 

[Trapps84]

I've literally just bought two new ones for £94

 

[JamesBryan]

Renault Clio Sport 172 / 182 2.0 16v Genuine Petrol Fuel Injector *New* - RenParts

Genuine OE Item New

renparts.co.uk

 

[Sir Nancy Flowers]

Just done a probably 40 mile round trip. Feels fine. Pulls well. Bit janky on idle but that's to be expected. Flashing light came on only at junctions or lights.

I'll switch them out for the used ones and go from there. Thanks lads. Really appreciate it!

 

[Sir Nancy Flowers]

So. Switched out cylinder 2 injector with a spare. Drove fine. Now flashing EML again on idle. This time code P0300 has reared its ugly head again!

 

[JamesBryan]

So. Switched out cylinder 2 injector with a spare. Drove fine. Now flashing EML again on idle. This time code P0300 has reared its ugly head again!

P0300 is random cylinder misfire.

It'll be one of the other injectors but it's not telling you which one 😂

When it's idling, unplug each connector one by one to see which one doesn't make a difference.

 

[Sir Nancy Flowers]

I'll give that a shot shortly. Just been out for a drive so I'll give it some time before I fiddle. Dont fancy my own personal pig in blanket just yet

 

[JamesBryan]

I'll give that a shot shortly. Just been out for a drive so I'll give it some time before I fiddle. Dont fancy my own personal pig in blanket just yet

Unplugging the power to the injector won't be a problem, safety wise.

 

[Trapps84]

hope it works for you, I'm still waiting on my injectors just called euro parts and they said boxing day they'll arive.....I was hoping id have the car sorted so I go for a rip on xmas day with quiter roads

 

[Sir Nancy Flowers]

Fingers crossed for you.

In regards to the unplugging of the injectors. It seems to idle ok so will unplugging them be easy to tell?

 

[JamesBryan]

Fingers crossed for you.

In regards to the unplugging of the injectors. It seems to idle ok so will unplugging them be easy to tell?

If it's idling fine then it might be difficult to tell but it's worth a go.