Hi all,

I have a query regarding my fiesta red edition.

A couple of nights ago whilst going up a hill I noticed that halfway up the hill the car seemed to pull a bit less at the same throttle position.

Since then I have noticed there seems to be what feels like increased turbo lag and a slight reduction in power. It is not drastic and it still pulls, just doesn’t shove me into the seat quite as i remember.

This could be entirely placebo but even a few days on I feel it isn’t 100%
 

The engine idles and revs fine and doesn’t have and misfire type symptoms. I plugged the car into my code reader and no codes are present.

Does anyone have any advice or similar experiences to this?

Thanks in advance!

What year ?

What mileage ?

Has it had or does it need the wet belt changed ?

Have you used FORScan to check all Ford specific DTC's ?

Your profile relates to a different car, does it need updated ?

10 minutes ago, unofix said:

What year ?

What mileage ?

Has it had or does it need the wet belt changed ?

Have you used FORScan to check all Ford specific DTC's ?

Your profile relates to a different car, does it need updated ?

2016 with 42k. Not currently had the belt changed but I am aiming to do it this year sometime as I would like to do it sooner rather than later. 
 

I have had it since 18k miles and do oil changes every 6k. 
 

I have not used FORScan but I am going to invest in a dongle for my laptop as I am planning on doing the cruise control retrofit soon so I will need it for that.

Damn it has been a while! I will update my profile now!

2 minutes ago, Kieran Sliwowski said:

I am going to invest in a dongle for my laptop as I am planning on doing the cruise control retrofit soon so I will need it for that.

You will need to use the vLinker FS cable if you want to make programming changes.

https://www.amazon.co.uk/Vgate-vLinker-Adapter-FORScan-MS-CAN/dp/B0952P4MLP

2 minutes ago, unofix said:

You will need to use the vLinker FS cable if you want to make programming changes.

https://www.amazon.co.uk/Vgate-vLinker-Adapter-FORScan-MS-CAN/dp/B0952P4MLP

Nice one thanks, I will get one of those on order. I will plug it in tomorrow and see if there are any specific codes that aren’t throwing an engine light 

On 2/27/2024 at 8:25 PM, unofix said:

You will need to use the vLinker FS cable if you want to make programming changes.

https://www.amazon.co.uk/Vgate-vLinker-Adapter-FORScan-MS-CAN/dp/B0952P4MLP

An update to this.

Received the adapter today and got forscan setup on my laptop.  Showing 0 fault codes at all so it is nothing obvious it seems which makes sense being that it still pulls fairly well just feels slightly laggier than usual.

Just a bit strange really, is there any common faults like this. I am going to try and check all of the boost pipes/vacuum lines incase there is a small leak from anywhere 

1 hour ago, Kieran Sliwowski said:

 Showing 0 fault codes at all

That seems to good to be true, there is nearly always a few 'U' codes and an odd random code. You have taken FORScan out of demo mode and ticked the box for diagnostics ?

@Tizer might be able to suggest some live data to check.

From your description of the symptoms It is difficult to suggest what to check.

I would change the Spark Plugs and Air Cleaner if it is dirty and check the Mode 6 / Key On Engine Running tests in FORScan. The Mode 6 test results will not mean much other than it should show if there has been many misfires, maybe not enough of them to light up the Check Engine light. 

I assume that your Clutch is not slipping.

As Tizer says, change the plugs, for genuine plugs ASAP