Mis fire

[cockercas]

On my now crappy car it's not firing cylinder 3.

I have 12bar of pressure so I have compression. I have a spark.

That leaves me fuel/air mix.

Can you test/clean injectors?

Plugs definitely sparking in the cylinder. It's correctly gapped.

Emissions test suggested running rich but the plugs not wet with fuel.

I had 4 cylinders until i put 15mm of redex into the cylinders to clean some crap out.

Lost cylinder since then. There was a lot of carbon come loose.

Could it of blocked the injector from the cylinder?

[Mr Fro]

You can test an injector - you need a rig that can apply the appropriate pulse train, a beaker and some accurate scales.

Or you could do a swaperoo with an known good one and see if the misfire moves... If it's dodge then chuck it in a sonicator.

[ApolloMozart]

sometimes redex stuff eats too much of the carbon deposits and creates gaps between piston/cylinder and valves/seats.

try swapping the injectors around first and see if the misfire moves...

[cockercas]

Thanks guys. I was thinking the same thing this morning.

[Fozzie]

Just remove the injector and put the end into a bottle and turn the car on and see what it's doing

You should get a near constant heavy mist.

[Stu]

If no miss fire before the redex then I would be looking at the plugs

And get the management light turned off

[cockercas]

No miss fire before redex.

Swapped injectors 2 with 3.

Cyl 3 still dosnt fire. Plugs black. Took new plug out and put old plug back in. Still dosnt fire.

Made a ht lead, still dosnt fire.

Swapped coil packs still nothing.

Checked voltage to injector 3, its ok.

Run out of ideas now.

A lads bringing me a diagnostic machine later.

[cockercas]

I have 4 cyl. A massive oversight on my part.

Pluged diagnostics in. Miss fire on 1 and 3.

Twiged that id put the leads on the coil pack the wrong way lol. Marked on the lead tge cylinder number but not the coil pack it fired of lol.

The leads go on the opposite way you would think.

3 of us looked, all with diffrent levels of experince and we never spotted it.

Should of checked my firing order.

[CGD217]

Decent news! Got there in the end

[cockercas]

Yes, something i probaly should of noticed when i started making h/t leads lol.