My car with MR230 is due a cambelt this year due to being 10 years old so thought that with a view to the possibility of going M310 in the future and avoiding any further complication with cam belt timing I thought it would be worth getting the M235 Smart Flash.

Mountune have been great, sent me all maps I needed for MR230 Cam Timing M235 Map and Stock Cam Timing M235 map. I have been enjoying the M235 on MR230 Cam Timing!

It's definitely WAY more punchy now. I would almost say it's too punchy compared to the MR230 as that was more linear in delivery. Mountune did reduce the cost of the upgrade for me considering I had MP215 > MR230 and already paid for those maps. It does smart a bit but having the flexibility of further upgrades and being able to go back to stock cam timing is a boon to me!

Fitted the new carbon intake also and it's gone from OEM+ to ASBO.

 

My car with MR230 is due a cambelt this year due to being 10 years old so thought that with a view to the possibility of going M310 in the future and avoiding any further complication with cam belt timing I thought it would be worth getting the M235 Smart Flash.

Mountune have been great, sent me all maps I needed for MR230 Cam Timing M235 Map and Stock Cam Timing M235 map. I have been enjoying the M235 on MR230 Cam Timing!

It's definitely WAY more punchy now. I would almost say it's too punchy compared to the MR230 as that was more linear in delivery. Mountune did reduce the cost of the upgrade for me considering I had MP215 > MR230 and already paid for those maps. It does smart a bit but having the flexibility of further upgrades and being able to go back to stock cam timing is a boon to me!

Fitted the new carbon intake also and it's gone from OEM+ to ASBO.

Nice! 👌🏻

I agree, the car does feel very punchy now compared to the MR230 upgrade. I’ve been loving the M235 upgrade ever since installing it a couple of months back; dare I say it but it’s much more superior to the MR230 upgrade now having that extra noticeable torque.

I’m yet to purchase the carbon intake but your ASBO description has now got me justifying my bank balance once again! 😂

 

An excellent review.

I purchased the same upgrade during the 12 days of mountune promo - couldn't resist adding some extra torque, plus having the immobiliser option was for me a no-brainer.

 

An excellent review.

I purchased the same upgrade during the 12 days of mountune promo - couldn't resist adding some extra torque, plus having the immobiliser option was for me a no-brainer.

Thank you matey for your kind words. ☺

I just thought I’d like to share my thoughts on here for anyone that was debating/wondering the same thing as me and I’m now delighted with purchase. 👍🏻

 

As with any change in power, unless you run full TC all the time, you'll have to adapt your right foot accordingly.

There will be slip in the wet, even with an LSD equipped Fiesta, as they're FWD, high torque and skinny tyres.

 

I've owned my ST since autumn. Has stage 2 VUDU intercooler, various large pipes (🤷🏻‍♂️) and mountune airbox but has a standard map. Was thinking of getting a map like the M225 as the car feels laggy and seems like it gets bogged down with the large cooler and standard map. Will do some research on this. Is traction a bit of an issue in a Mk7 with a map?

 

I have the M235HT tune on my Fiesta ST (upgraded from MR230) and I've been having problems with it. The cars MOT was 2 weeks after flashing the M235HT map. The car failed the MOT on emissions and not just a bit out, it was way out. The MOT inspector suspected the car to be running rich due to the map on the car, warning this would damage the CAT and Turbo. I reinstalled the MR230 map, did 80 miles worth of driving and made sure the the emissions readiness monitor statuses were completed using the TDN app. The car passed the emissions re-test 'clean as a whistled', which to me suggests there is no problem with the car. I have reinstalled the M235HT map with the view to getting the emissions rechecked after the car has all the emissions readiness monitor statuses completed. Unfortunately after 500 miles of driving the Oxygen Sensor readiness is still incomplete.

Do other M235HT owners have the Oxygen Sensor readiness status as incomplete?

What MPG are you achieving? (I'm getting around 40MPG on the M235HT map, I was able to achieve 47MPG on the MR230 map.)

 

I’ve always had a developing fault code on my car since MR230. Something to do with efficiency on bank 1 sensor or something.

Mountune said this was normal…

 

I have had my cambelt done this week at MJ Performance who were brilliant and reverted back to stock cam timing and installed the stock cam timing M235 map now.

Not sure whether the car is relearning or settling but the stock cam timing M235 map feel totally different to the MR230 cam timing version.

I’m happy to be back to standard cam timing now to avoid any further complications but the car feels a bit flat now. Will take it out again today and see. Almost feels stock…

always felt the MR230 was revvy, the MR230 M235 a bit too punchy and not very smooth but now it’s a bit flat…

I have my gear change indicator back now though…

 

I’ve always had a developing fault code on my car since MR230. Something to do with efficiency on bank 1 sensor or something.

Mountune said this was normal…

Hi Logsi, Thank you for your replies. Interesting that you say that Mountune said that it was normal for MR230 to develop a fault code. My car was on MR230 for 5 years and never had fault code come up. That said the car been on M235HT for the past 4 months and recently had a P2279:95:28 Intake Air System Leak Bank 1, incorrect assembly fault code flag up. I had the car checked over but couldn't find any issues with it so the code was cleared. The car has been running fine, just worried about the potential rich fuelling damaging the CAT.

The car (M235HT) did go into the MOT cold but the emission figures were so far out there had to be a problem with the car or map. All previous MOT's I've had done the car (MR230) has been cold with no issues, but I do realise that the CAT works optimally when very hot. I took the car (MR230) in warm for the MOT emissions retest.

I've checked the battery on the car which is now 8 1/2 years old and its coming up as weak. So I will change this soon. I've read that a weak battery can cause sensor gremlins.

I have my gear change indicator back now though…

None of the Mountune maps I've had on my car have shown the gear change indicator. Might be worth checking which map has been installed.

 

Hi Logsi, Thank you for your replies. Interesting that you say that Mountune said that it was normal for MR230 to develop a fault code. My car was on MR230 for 5 years and never had fault code come up. That said the car been on M235HT for the past 4 months and recently had a P2279:95:28 Intake Air System Leak Bank 1, incorrect assembly fault code flag up. I had the car checked over but couldn't find any issues with it so the code was cleared. The car has been running fine, just worried about the potential rich fuelling damaging the CAT.

The car (M235HT) did go into the MOT cold but the emission figures were so far out there had to be a problem with the car or map. All previous MOT's I've had done the car (MR230) has been cold with no issues, but I do realise that the CAT works optimally when very hot. I took the car (MR230) in warm for the MOT emissions retest.

I've checked the battery on the car which is now 8 1/2 years old and its coming up as weak. So I will change this soon. I've read that a weak battery can cause sensor gremlins.



None of the Mountune maps I've had on my car have shown the gear change indicator. Might be worth checking which map has been installed.

My MP215 did but as soon as the MR230 was installed it ceased to show the gear up sign in the middle cluster.

It shows this again now.

The developing fault was just in the background and wouldn’t flag an EML but if you used the mTune handset or smart flash it shows it. It’s gone now since going back to stock cam timing and M235. Will keep an eye on whether it comes back.