How to: Check a misfire & replace HT ignition leads

Gold one I have changed good

Hi Craig
I would have a question about my car if you could help me out.
I was just wondering. MOT has been done to my care which is a Ford fiesta, before the MOT the noise level was high in the car, its consumption was also high and it's felt like it doesn't have much power in it. after running a test on its computer to find any problems with the car, everything was fine. oil has been changed, oil filter and also Air filter was changed and they reset the on board computer. The engine ran very nicely without effort, very quietly, very quickly and its fuel consumption was perfect no noise whatsoever. The yellow engine error light came on when we were traveling, the noise level increased, the consumption also increased, the performance decreased. now I don't know what to do... any suggestions please

Thank you very much man , you're perfect explain solved my problem , 🖐️🙏🫡🌹

Please tell me, which software you use on your mobile phone for diagnostics? I have the same model of car.

If you use your phone recorder you can hear the arcing to ground whether engine is running

Wish I'd watched this last night. Just spent this morning buying plugs, coil pack and then HT leads, in that order, in three trips to Euro Car parts for my misfiring MK 2 pre-facelift Focus. Problem was HT leads. I'll be getting my multimeter out later to find out which bugger was the culprit. Apart from that one, I'll now have a complete set of spares at least, lol.

Hey, have you still got your mondeo? I think I'm the only one around here for miles that still runs mk3s

Hi Craig! I’ve enjoyed all your videos so far as your Mondeo is the same as mine with a very high mileage of about 300,000 & I’ve owned it now almost 10 years & bought it second hand. All I have had to do to the engine is replace the water pump. Which was a real sod of a thing to remove because it had been glued in from new by the looks of it!
The ignition gave me a bit of strife a year or two back, & a mechanic said it was the coil pack so purchased a brand new one! In all the time that I have owned the car I have never replaced the spark plugs because I have been told that I shouldn’t need to! The car has never missed a beat except for the coil pack! ( touch wood!) It’s got tonnes of get up & go! Even though I have driven from the middle of the north island to the top & back again numerous times!
I am surprised that you have had to renew or look at lots of various things with your car’s engine that I haven’t or won’t ever consider touching! I have however just recently added some Power Up to the engine & transmission to help with the lubrications of the engine & automatic transmission smoothness etc. I probably unlike you have a heavy right foot, so when I drive somewhere in my Mondeo it’s not going slow, but I always keep to the speed limit!
Oh I recently replaced the plastic rocker cover for an alloy one because the gasket seals leaked oil into the spark plug wells as the four seals became hard & brittle & stopped sealing & no amount of tightening would over come it! You cannot over tighten plastic covers without breaking something!
Cheers for all your videos as they all have been most helpful especially changing the power steering pump having two o’rings that have to be of the green type!
As for the catalyst in the exhaust system have your muffler man knock it all out and the engine goes just as good if not better without it not in there!!
Keep your videos coming as they are all full of good helpful knowledge!

Can you please help me with my floty broblem

Really excellent video, clear, concise and very well paced. Thankyou for this, it was extremely helpful

Hey Craig, loving your scientific approach and British understated presentation/lack of hype (dude!), from one Brit to another

Hi Craig I've got a petrol feista 09 plate won't start again if the engine is warm change a battery , new spark plug and the voltage are good any advice what's wrong with it?

Hi Craig, I have owned my 2001 2ltr Auto Mondeo for 20 years now and maintained it myself. Recently if I'm in drive and stationary then hit the accelerator in quick succession so say pulling out of a junction the engine hesitates then goes but if I slow down the reaction time from brake pedal to accelerator then all is fine. The resistance on the HT leads are all within tolerance and I have replaced the spark plugs. Like you I have a obd scanner that provides live data but no faults shown so I was wondering if the throttle position sensor could be the cause!

I have a 2.9 12v cologne engine it's a piece of s***

Brilliant and detailed explanation ThankYou. Great oratory and easily followed . Stephen australia

Very helpful videos ,keep up the good work.

Very helpful. Thank you. :)

I prefer to disconnect and test one lead at a time so you dont forget the order in which the leads are connected to the coil

is this post xmen where magneto works on cars? xD Michael Fassbender look alike for sure

Have you got the leads yet? I'm still waiting for the video about the leads

How to remove the mk3 cooling fan and water tank, as well as complete water channel cleaning

Help please! We just bought a Ford Mondeo Mk3 Automatic second hand, and there's a hose loose. It's the one on the gearbox, bellow the air intake and below the battery. Right next to the sticker with PTAN 1S7P-BA. We don't know where should be plugged the other end. Any guidance would be much appreciated!

My 1.8L petrol mondeo has a rough and inconsistent idle.
Have replaced the sparkplugs, ignition coil, ht-leads, fuel filther and cleaned the air intake parts.
Anyone have any ideas what it could be?

Me too i have misfires just under load and just when hot and all the garages are closed because of the quarantine

Can you show me how to change the transmission filter?

Great video!

Nice job 💪 thx 😎👍

HT leads? what are those, i have not seen them on a vehicle for years, oh you have a FORD that explains it.

Excellent stuff!

you've helped me a lot in the past with fixing my old Zetec 2.0 on my Ford Escape
I haven't had the chance to thank you, so thank you!

I've changed HT leads, spark plugs. cleaned out tmap sensor and air filter, throttle body. and my car hesitates at low revs at start of acceleration (sometimes) ... is it coil pack, air leak?? (mondeo mk3)