Ford Focus 1.6 petrol, high and rough idling, running lean. Fault finding and repair.

[@fir3w4lk3r]

Nice video!!! Actually when everything is OK, STFT values should go from -5 % to +5 % (max values). STFT is what forces the mixture to be slightly rich and slightly poor, in order for the catalytic converter to be happy. You had a substantial air leek. I bet that the LTFT was maxed at about +20~30 % and the ECU was also using the STFT to account for the leek (+5 to +10 %). This is why it needed more time to equalize. SFTL will always change some percentage around a value. LTFT will be stable. To all automotive mechanics out there: Learn what STFT ant LTFT commands are are how and why they are issued by the ECU. It will tremendously improve your diagnostic capabilities.

[@LMAutoRepairs]

👍👍👍 Thanks for watching and for you explanation...

[@malandrosranks1193]

Thank you so much, this was helpful in resolving a similar fault I had. Like others have said its a real shame the other video was deleted.

[@LMAutoRepairs]

☺️ 👍👍👍

[@stevepettifer4896]

For anyone else wondering which of the bewildering array of numbers on the pack is relevant, it is 1761516. Awesome vid, thanks for this. My wife's old 1.6 Mk2 was doing exactly this. I noticed it honked of fuel when she started it up and the idle was terrible. Plugged in Forscan and sure enough the short term fuel trim was 12+% and rising. Ford have a parts shop on fleabay and will sell you one for £13.66 and plenty of other motor factors online will sell you an OEM quality one for under a tenner.

[@LMAutoRepairs]

😊 👍👍👍

[@CarsExposed]

It’s really frustrating when you delete videos by mistake I’m glad you got a new phone ... and thanks very much for taking the time to video this one we really appreciate it 👍👍👍🍻

[@LMAutoRepairs]

Thanks Igor! 👍👍👍

[@valeriujosan4115]

Hi mate You have no idea how much this video helped me, I have the exact problem on my ford focus 2006, like from me👌👍

[@LMAutoRepairs]

😊 👍👍👍

[@isalmankhan1]

Thanks for sharing Bro👍 I feel really sad about the footage loss, cuz we missed the diag part of it, but also very thankful for being able to see the fix, which is very satisfying like always😉 Stay Safe👍

[@LMAutoRepairs]

😊 Thanks!

[@johnathanwilliams5953]

Brilliant . Same fault fixed my car 😊

[@LMAutoRepairs]

That's great! 👍👍👍

[@Phecabooth]

hmmm, glad find this video, this might help with my oil burning/leaking issue.

[@LMAutoRepairs]

😊 👍👍👍

[@januszderen1253]

Typical issue for those engines (and 1.25 as well). God job as always :)

[@LMAutoRepairs]

😊 Thanks! 👍👍👍

[@jgeorges3061]

SO Louise, when you say re flush the ECU/PCM you meant to re program it with J BOX and as always good info/video cheeeeeers.

[@LMAutoRepairs]

Yes... basically reload the software.... 👍👍👍

[@tunconder1101]

Thanks a lot , we understand how a torn off hose can effect the idling and short trim ...

[@LMAutoRepairs]

👍👍👍

[@simonjohnhinton1938]

on my mk4 petrol mondeo I had installed a brand new plastic manifold because I was concerned with the tumbler flaps as it had about 139k miles on the clock. on my previous mk3 mondeo I changed the flaps for new ones which took a fair bit of time.

[@LMAutoRepairs]

Yes... they are usually a quite filling job... 👍👍👍

[@jeremystone6613]

Thanks for persevering

[@LMAutoRepairs]

😊 👍👍👍

[@symeproalarme9699]

dear L M It is with great pleasure to write to you. I am an alarm installer in ALGERIA, I have been following your video for a long time. Now I am starting to reprogram the ECUs. I work with UPA and K TAG programmer. If possible to know how to deprogram ADBLUE, and what is the best software to work on it.

[@andrewyeo2353]

Thanks good video as always and surprise surprise no fuel when u get vehicle 😄

[@LMAutoRepairs]

😊 👍👍👍

[@mrgrumpy5116]

we all get one of those moments with the video .... , but you found it and fixed it, good. can you say what software you were using to check the fuel trim

[@LMAutoRepairs]

Ford IDS... Thank you for watching and for your comment! 👍👍👍

[@fir3w4lk3r]

I believe that there is no need for special software regarding fuel trims. It is an OBD-II command. Service 01, PID 06 to 09.

[@mrgrumpy5116]

@@LMAutoRepairs thanks

[@beluxauto5968]

Something totally different . Your video was fine as always but I was actually laughing . If you think you have a vacuum leak . Spray something flammable . And I was waiting for you to say , and if it bursts into flames you know you sprayed the wrong product or on the wrong spot .

[@LMAutoRepairs]

🤣🤣🤣🤣🤣

[@ivandrago2557]

Nice case study. Still don't get it why rpm was fluctuating. Woludn't rpm be steady high with vacuum leak.

[@fuzzs8970]

I'm wondering if it's not a problem with the ECU. Strange that the car data got corrupted. Thanks for taking the time to share your work.

[@LMAutoRepairs]

Not strange really... had it i many cars, and in different modules... Quite possible due to low voltage... low battery etc... Thank you for watching!

[@AutoDiag_]

Good tips thank you

[@LMAutoRepairs]

😊 Thanks, for watching and for your comment!

[@electronic7979]

👍

[@LMAutoRepairs]

👍👍👍

[@oussamamansouri4261]

hello lm thanks a lot for ur good vidoes . from where u did bought ur maxisys ?? and if u didnt do the update , the scan tool will still works good !! thanks

[@LMAutoRepairs]

I bought my one on eBay... if I recall correctly... Yes the tool will carry on working... only the online capabilities are lost... Thank you for watching!

[@paulcommins83]

Brilliant video that's exactly what's wrong with my focus now. What the name of the pipe that needs replaced so I can order one thanks

[@LMAutoRepairs]

The pipe! 🤪☺️ Just kidding... I am not sure what it is called... It is like a breather pipe sort of... 👍👍👍👍

[@paulcommins83]

@@LMAutoRepairs I'm hoping it's the Crankcase breather hose

[@paulcommins83]

I just went out and bought a Crankcase breather hose That's exactly what my car needed great video that saved me a headache trying to figure out what was wrong

[@LMAutoRepairs]

☺️ Nice one! 👍👍👍

[@rosidus]

I exchanged mine and the pcv valve but still have a rough idle.

[@rosidus]

You can just pull the pipe put. But youll have to take off air filter box

[@lucidfairytales]

What tool are you using to read engine (the one with the big screen)?

[@LMAutoRepairs]

It ia a laptop running IDS... 👍👍👍

[@Agavarc]

Is IDS the fastest updating scan tool of all brands? BMW Inpa is quite fast, but IDS updating, looks almost like oscilloscope.

[@LMAutoRepairs]

IDS is for ford only... INPA is a quite old version of BMW softwares... it is ISTA nowadays... Thank you for watching! 👍👍👍

[@Agavarc]

Yes i know that :-) I meant, if we take any scantool, no matter if it is factory or universal, Ford, BMW, Renault or whatever, IDS looks the fastest (in data update rate).

[@LMAutoRepairs]

@@Agavarc 😊😋 Got you... Yes, it is indeed quite fast... 👍👍👍

[@salahbona6234]

Fuel trim stft and ltft. Vacuum lake house

[@tomastopol8712]

Hi, could you let me know the name of that broken pipe? Or maybe a link where to buy it, have the same issue. Thank you.

[@paulcommins83]

Crankcase breather hose

[@SarfrazKhan-xy2rc]

Where's aboute u live I mean which city

[@neilmurphy845]

Did you try using a SD card to put your videos on

[@LMAutoRepairs]

Well... the phone records to the SD... but compiles to the phone memory... I compiled the video, deleted the clips... and then by mistake deleted the compiled video...😬 🤦‍♂️ Using the S7 purely for video recording now... so shouldn't happen again... 👍👍

[@neilmurphy845]

@@LMAutoRepairs why does Android do that I think windows doesn't do that

[@hashirnawaz4532]

Nice

[@LMAutoRepairs]

Thanks!

[@bechirzahra8610]

Well done! I have a problem with my Opel Meriva 1.6 petrol 2005, it start when it's cold then when it goes warm up, it shows some signal (ABS, ESP...) And RPM stop working too.. and if I stop the engine in this case the car dont want to start again Can a relay cause this type of problems? In diagnostic I have these codes (U21 07-0, U21 08-0, U21 04-A, U21 05-0, B1 485-9) Thank you in advance (Sorry for my english)

[@LMAutoRepairs]

Those are prone to have bad ecus... due to the location of the ecu... gets too hot! kzbin.info/www/bejne/q2WZaJlqip2JgtU Thank you for watching!

[@bechirzahra8610]

@@LMAutoRepairs thanks a lot!! I am really fun of you, keep up

[@LMAutoRepairs]

@@bechirzahra8610 👍

[@neilmurphy845]

What does that vacuum pipe control is it a turbo or pcv

[@LMAutoRepairs]

PVC I believe.. this was not a turbo engine... 👍👍👍

[@predragpedja8636]

You're a good guy and you know what you're doing, but you're getting too much with the repetition of getting dark. :)

[@LMAutoRepairs]

☺️ 👍👍👍

[@kevinthacker8349]

What do you use to read Ford cars ecu on your lap top,

[@LMAutoRepairs]

On the laptop I use IDS or Forscan... Thank you for watching!

[@stevem5156]

how can i get in touch with you for booking in a key cloning for a citroen berlingo id46 transponder

[@aymenmohamed1134]

👍🏻👍🏻🌷

[@LMAutoRepairs]

😊 👍👍👍

[@Divided-Kingdom]

Hi buddy, where do you get the software to refresh the ECU? thanks

[@LMAutoRepairs]

With IDS... Thank you for watching!

[@SarfrazKhan-xy2rc]

How to contact you

[@LMAutoRepairs]

You just did...😉 Thank you for watching!

[@seankirby2580]

Good spot with the hose. Your response to ECU corrupted flash memory is shocking. You just reflashed it, so it could happen again. Exactly like some of your other videos where you just replaced a fuse without learning why they had blown.

[@kellytaylor3134]

HATER

[@LMAutoRepairs]

Hi You must to tell me which was the video where I replaced a fuse without knowing why it was blown... That said, a fuse can blow with a spike that can be caused by a singular event due to certain circumstances... sometimes you can't really dig isto it... If a fuse is blown, you put a new one and it does not blown, there is only so much you can check... you are not going to start to strip the entire car down... are you? Another thing, the software can easily get corrupt... and a reflash can sort it out... Many cars and modules suffer from that... specially due to low voltage, when batteries get low... You clearly have a low understanding about car electronics... Not that I am an expert... far from it... but I had those type of issues in the past, so I know is quite possible... Anyway, thank you for watching and for your comment!

[@fuzzs8970]

Most of the dealers I know would do the same thing though. Flash the ECU first when it's corrupted. Then change it if the problem persist. As for the fuse replacing a fuse is definitely the way to go. If it blows again then investigate

[@LMAutoRepairs]

@@fuzzs8970 Absolutely... 👍👍👍

[@seankirby2580]

@@LMAutoRepairs It was the one with the seat belt switch that was earthing. You originally just replaced the fuse. When the customer brought the car back you did a proper investigation and found it.

[@lukeh7854]

8 miles to empty, classic 😂

[@LMAutoRepairs]

Yes it is... 👍👍👍

[@scottykilmer1094]

Your car whas running lean not RICH.

[@LMAutoRepairs]

😊 My bad... Thank you for watching and for your comment! 👍👍👍