Fiesta 1.0 mk7.5 ecoboost wont start, need help please. READ AND BE AWARE!

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Graham17
Posts: 771
Joined: Mon Jun 08, 2020 6:59 pm
Vehicle: Fiesta, 1.0 ecoboost/125/2016 Focus Mk4/125/2019

Fiesta 1.0 mk7.5 ecoboost wont start, need help please. READ AND BE AWARE!

Post by Graham17 »

Hi Guys, my partner has a 2016 mk7.5 Fiesta 1.0 ecoboost. 54k regularly serviced and just had MOT which was all ok inc emissions. Driving at 40 mph in 5th the car suddenly died and refused to restart. She said just before this happened a warning flashed up stating ' Clutch Service required'. I went down to have a look armed with Forscan and a multimeter. Checked battery ok at 12.6v. Logged on with Forscan 4 DTCs in PCM all relating to Throttle position sensor. Nothing on clutch, and putting in gear turned engine without slipping?
Carried out PIDS check on throttle position sensor and seemed to be working OK, so cleared DTCs and tried to start. Pressed clutch and power button, engine spun over rather quickly. Sounded like no compression and refused to start.
Called AA to recover it, he had a look at it and said sounds like head gasket gone. He checked that the valves were moving by removing oil cap they were so cambelt ok and no strange noises.
Coolant is fine as is the oil, no emulsification or mixing.
So its now at garage who state they think engine gone faulty and want 1k to strip it to find out, but cant compression test it as dont have the needed tool. So now wanting to send it elsewhere at our cost.
Question if engine has gone how come no warning, not under any load at 40mph, no loss of water or oil, no mixing, no steam or smoke and only throttle fault codes.
Any ideas guys would be really helpful as told a new engine 3k nearly what full cars worth, even used engine fitted nearly 2k then theres a clutch if needed. Full rebuild depending 2k also but tskes longer.
As out of warranty Ford wont help.
Are these engines really that problematic, seen some over 100k still run ok??
Last edited by Graham17 on Tue Jun 14, 2022 6:51 pm, edited 1 time in total.
Donny
Posts: 73
Joined: Sun May 08, 2016 9:00 pm
Vehicle: Focus 1.6 Tdci 201071QP67

Re: Fiesta 1.0 mk7.5 ecoboost wont start, need help please.

Post by Donny »

The only things I would suggest are disconnecting the Battery for 10 minutes, checking the Fuel Pressure PID's with FORScan and maybe getting an old style Spark Tester to see if the coils are firing. The other thing is to check all the engine compartment fuses, there will be one or two for the fuel system.

That doesn't explain the other symptoms though and I've never heard of the Head Gasket failing on all 3 cylinders at the same time.
Graham17
Posts: 771
Joined: Mon Jun 08, 2020 6:59 pm
Vehicle: Fiesta, 1.0 ecoboost/125/2016 Focus Mk4/125/2019

Re: Fiesta 1.0 mk7.5 ecoboost wont start, need help please.

Post by Graham17 »

Thanks for reply, i will check the things you suggest. Although you would expect Forscan would show up DTCs in PCM if fuses or fuel pressure failed, but def worth a shot.
Apparently the ecoboost engine has a reputation for cracking the inlet manifold which is integral to the head, this allows leakage from all 3 cylinders on compression results in symptoms, but can only be confirmed by removing head and pressure testing, also theres an issue with degas hose splitting causing other compression issues, or even head warpage, altho as you say unlikely on all 3 cylinders?
Ford are aware of the issue and 1st 3 years will replace
engine under warranty or give help with cost, not so out of warranty unfortunately. £1k is a large bill if you then decide not to go ahead with repair as its dead money.
Graham17
Posts: 771
Joined: Mon Jun 08, 2020 6:59 pm
Vehicle: Fiesta, 1.0 ecoboost/125/2016 Focus Mk4/125/2019

Re: Fiesta 1.0 mk7.5 ecoboost wont start, need help please.

Post by Graham17 »

The story moves on. Well tried to check fuel pids but nothing reads on Forscan, so given up with it. Car got towed to Ford who wanted 6k for a brand new engine, more then cars worth! I asked if Ford would help, they said may pay up to 50% if you can prove something has failed due to poor manufacture. Even then thats still 3k.
Eventually found a specialist engine repairer who can do it for less then 2k fully rebuilt and refitted. Im very surprised more on here arent knowledgeable about this, after all a lot of Ford cars use this engine.
Be aware the wet toothbelt is supposed to last 100k miles or 10 years, ours inly did 54k and 6 years, it strips off teeth which allow the cam ti.ing to slip causing loss of compression on all cylinders, also rubber from belt clogs up oil strainer starving engine of oil, ruining all the shell bearings and possibly rings etc. Its a disaster waiting to happen.
Hopefully get it sorted, my advice get that wet belt changed early they do not last 100k thats for sure!
Last edited by Graham17 on Wed Jun 15, 2022 7:01 am, edited 1 time in total.
Donny
Posts: 73
Joined: Sun May 08, 2016 9:00 pm
Vehicle: Focus 1.6 Tdci 201071QP67

Re: Fiesta 1.0 mk7.5 ecoboost wont start, need help please. READ AND BE AWARE!

Post by Donny »

That is bad news Graham, I knew they suffered from oil starvation because of the bits of belt clogging up the oil pump but was not aware of the teeth stripping as well. If the car has had dealer servicing on time then Ford customer care may cover the cost for cars less than 6 years old.

I believe the newer MHEV ones now have a chain but still have the small oil pump wet belt that your car has as well.

The only advice I would give for your rebuilt engine is only to use the recommended Castrol oil, change it more often if the car is used for a lot of short journeys, check the old oil to see if there are bits of belt coming away and never use an engine flush.

I don't know what the gearing is like on your car but personally I would not drive around at 40 mph in 5th gear with a petrol car, it puts more strain on the engine and drivetrain than driving in 4th. just my personal opinion.
Graham17
Posts: 771
Joined: Mon Jun 08, 2020 6:59 pm
Vehicle: Fiesta, 1.0 ecoboost/125/2016 Focus Mk4/125/2019

Re: Fiesta 1.0 mk7.5 ecoboost wont start, need help please. READ AND BE AWARE!

Post by Graham17 »

Thanks for reply, the car has been serviced annually 1st 2 years by Ford remainder by independents, always used correct Ford spec oil. Yes its used on frequent short journeys but thats why you buy a small engine so it gets up to temp quicker.
I take your point about 5th gear above 40mph, although i drive it infrequently as my partners car it seems to pull without strain in 5th gear.
My conclusion is this if the 1.0 ecoboost is used on short journeys change the oil 6 monthly not annually and change wetbelt earlier then 10 years or 100k, yes its expensive and needs special tools to do, but a hell of a lot cheaper then a new engine!
davetcollection
Posts: 139
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Vehicle: Focus 2017 ST-Line 1.0 Auto 6F15

Re: Fiesta 1.0 mk7.5 ecoboost wont start, need help please. READ AND BE AWARE!

Post by davetcollection »

I would be investigating all the service centres to ensure they never used flush during oil changes and that they used the correct oil
Graham17
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Joined: Mon Jun 08, 2020 6:59 pm
Vehicle: Fiesta, 1.0 ecoboost/125/2016 Focus Mk4/125/2019

Re: Fiesta 1.0 mk7.5 ecoboost wont start, need help please. READ AND BE AWARE!

Post by Graham17 »

Sound advice but impossible to verify as none would admit to it, especially if doing so would result in a claim against them. Also havn't had car from new, so other then book stamps no way to ensure correct oil etc used.
When i had my car serviced theres a tick box for special oil, costs £20 more which i tick, but do they actually use the more expensive oil or not? Could anyone tell the difference? Unlikely
Engine has now been rebuilt on Fiesta, it needed all new shell bearings, 3 new pistons/rings, wetbelt kit, waterpump and oil pump, clutch kit and gasket set, total cost £1650. Which is a lot better then Fords £6k or even 3k with discount from Ford for failing under wetbelts100k limit. If you get it?
I still maintain the only sure way to prevent engine failure is to replace wetbelt early ie 50k instead of 100k, we've also been advised to have sump removed every 2 years and have it cleaned out along with oil pump pickup to remove wetbelt residue. Again an expensive option.
My conclusion would be for Ford to re design the wetbelt back to external cambelt, or better still use a chain, bit noisier but better then engine failure!
Donny
Posts: 73
Joined: Sun May 08, 2016 9:00 pm
Vehicle: Focus 1.6 Tdci 201071QP67

Re: Fiesta 1.0 mk7.5 ecoboost wont start, need help please. READ AND BE AWARE!

Post by Donny »

There is no special oil. The oil that ford put into it in the factory is Castrol synthetic oil and is the same one that you can buy over the counter, or if Ford still sell Ford branded oil then it is the same Castrol oil.

Glad you found someone to rebuild your engine for a very reasonable price, I did not think that parts were readily available for that engine.

I think that all the latest 1.0 engines that were fitted to the Mk 4 Focus were the newer ones with a chain and a small wet belt for the oil pump, not just the MHEV engines. I don't know about the later Fiesta's though.
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