1 hour ago, EJFocus said:

Just speculation at this point but could be a a leaking valve seal or piston rings. That said don't panic because it's not unheard-of to see a little bit of oil on a plug and everything be more or less fine.

Could that be the reason I have an engine idle issue and issue above?

54 minutes ago, M Lam said:

Could that be the reason I have an engine idle issue and issue above?

Yes either could cause the engine to idle rough as it will effect the normal combustion, basically because there is oil where there shouldn't be. 

Do you have any blue smoke coming from your exhaust and does the engine feel like its lacking in power generally? 

 

I wouldn't get too carried away with this being the issue because there are many things that could cause a rough idle besides this but it might be worth at least investigating. 

If this is a 1.8 Duratec they are notorious for worn piston rings.

Usually oil on plug threads is just from the cam cover seal and then drips down as you remove the plug, but on that picture it does appear to only be below the plug seal, suggesting an internal fault instead.

On 6/8/2024 at 9:43 PM, M Lam said:

It is 2.0L petrol. It is a 18-year-old car with 176,000 miles

I note the OP says it's a chain cam so is it just a larger capacity version of the 1.8HE? If so I guess it might suffer from the same problems, especially at the high mileage quoted.

12 minutes ago, mjt said:

I note the OP says it's a chain cam so is it just a larger capacity version of the 1.8HE? If so I guess it might suffer from the same problems, especially at the high mileage quoted.

Ah, missed that.   

It is essentially the same engine, though oddly the 2.0 doesn't seem to suffer in the same way.  I guess the piston rings must be a different size for the 1.8 and therefore potentially from a different supplier or not quite made to the correct spec.

However, yes at that high mileage there is likely to be internal wear on multiple parts.

23 hours ago, EJFocus said:

Yes either could cause the engine to idle rough as it will effect the normal combustion, basically because there is oil where there shouldn't be. 

Do you have any blue smoke coming from your exhaust and does the engine feel like its lacking in power generally? 

 

I wouldn't get too carried away with this being the issue because there are many things that could cause a rough idle besides this but it might be worth at least investigating. 

My mechanic just checked with his computer today, and he says, 'It is the throttle body issue'. I even mentioned that I changed the throttle body, which was well-used. 

He will get me an aftermarket throttle body and help me install it this Wednesday. He promised not to charge me if that was not a throttle body.

Let's see. 

 

46 minutes ago, M Lam said:

My mechanic just checked with his computer today, and he says, 'It is the throttle body issue'. I even mentioned that I changed the throttle body, which was well-used. 

He will get me an aftermarket throttle body and help me install it this Wednesday. He promised not to charge me if that was not a throttle body.

Let's see. 

 

Makes sense to rule it out. Fingers crossed.

On 6/14/2024 at 10:40 PM, EJFocus said:

Makes sense to rule it out. Fingers crossed.

Unfortunately, the issue with my vehicle is still the same. My mechanic replaced the new aftermarket throttle body, but the problem persists. He inspected the pipe (those easy access one only), but found no apparent issues. The only error code is P2110 and 2110. Therefore, he has ruled out any cable or pedal sensor problems, as they are not indicated on his computer. If there's any additional information I can provide to assist in the diagnosis, please let me know. 

So, I ran out of ideas as well. As I already changed
- changed the spark plugs
- changed throttle body
- replaced the Intake Manifold Vacuum Solenoid Valve

The speed limit mode and the engine feel rough if I drive slowly around the city, and I need to restart the car constantly to fix this problem. But they work fine if I drive at high speed, around 40 to 60 miles per hour.

Or perhaps there's something else I should consider changing? I'm open to any suggestions at this point.

back to erring on BCM or cluster, sorry. but i know a couple of guys.

On 6/13/2024 at 9:28 PM, M Lam said:

Could that be the reason I have an engine idle issue and issue above?

I think that is a red herring!

The usual reason for oil on the spark plug threads is a leaking cam/rocker cover gasket, with oil getting into the plug area. Then, as the plugs are removed, the oil runs down the threads.

3 hours ago, Jimpster said:

back to erring on BCM or cluster, sorry. but i know a couple of guys.

Replace the whole BCM like this?

 

Get someone with FORscan that knows what they are doing, replacing parts should be a last resort.

Contact either Richard Aaron Beetwell he has a company called Customod or Ollie Jones via facebook i think they are down your way, they can rule in or out the cluster etc.

2 hours ago, Jimpster said:

Get someone with FORscan that knows what they are doing, replacing parts should be a last resort.

Contact either Richard Aaron Beetwell he has a company called Customod or Ollie Jones via facebook i think they are down your way, they can rule in or out the cluster etc.

FORscan (this item?) https://www.ebay.co.uk/itm/135103535614. Do I need someone to run it? Or can I run it myself with YouTube?

If I am not mistaken, this guy (https://www.facebook.com/richard.beetwell) owns Customod? Unfortunately, I am unable to find Ollie Jones via Facebook.

 

54 minutes ago, M Lam said:

FORscan (this item?) 

No. Use the vLinker FS cable.

See post below.

 

On 4/7/2024 at 8:59 PM, unofix said:

FORScan (for use with Windows Laptop) : https://forscan.org/download.html

It's what many Ford owners use including some Ford technicians.

vLinker FS, cable for laptop: https://www.amazon.co.uk/Vgate-vLinker-Adapter-FORScan-MS-CAN/dp/B0952P4MLP

vLinker FD, for android phone: https://www.amazon.co.uk/Vgate-Bluetooth-vLinker-Scanner-Diagnostic/dp/B08H82WC8L

vLinker FD+, for iPhone: https://www.amazon.co.uk/Vgate-Bluetooth-vLinker-Scanner-Diagnostic/dp/B08H8JHWP2

 

Search Tag:   FORScan123

 

https://www.facebook.com/ollie2x4

On 6/21/2024 at 12:11 AM, unofix said:

FORScan (for use with Windows Laptop) : https://forscan.org/download.html

It's what many Ford owners use including some Ford technicians.

vLinker FS, cable for laptop: https://www.amazon.co.uk/Vgate-vLinker-Adapter-FORScan-MS-CAN/dp/B0952P4MLP

Sorry, I'd like to know: Can FORScan scan something that LAUNCH cannot? I want to investigate before buying the tool. I hope you don't mind. The main reason is my mechanic was only able to find P2110 and 2110 with the tool below (which costed around £500): - 

https://www.amazon.co.uk/LAUNCH-X431-Elite-Diagnostic-Bidirectional/dp/B0C85RM3RW

But I am happy to buy FORScan scan if they can scan something that the tool above cannot. 

16 hours ago, M Lam said:

But I am happy to buy FORScan scan if they can scan something that the tool above cannot. 

ForScan is FREE (unless you want to program modules in which case you need to pay for the extended license). What you need to pay for is a suitable cable to connect your laptop (which must rub run Microsoft Windows) to your car. Get one that unofix has recommended above.

You seem to have a 2006 Focus, I expect ForScan will fully support that.

5 hours ago, rd457 said:

ForScan is FREE (unless you want to program modules in which case you need to pay for the extended license). What you need to pay for is a suitable cable to connect your laptop (which must rub Microsoft Windows) to your car. Get one that unofix has recommended above.

You seem to have a 2006 Focus, I expect ForScan will fully support that.

Thanks. I just ordered one 😀

The problem with all generic code readers no matter how expensive they are is that most will not read the Ford specific DTC's. 

Ford use two different Canbus speeds and have many hundreds of their own codes. FORScan is developed specifically for Ford vehicles. 

1 hour ago, unofix said:

The problem with all generic code readers no matter how expensive they are is that most will not read the Ford and specific DTC's. 

Ford use two different Canbus speeds and have many hundreds of their own codes. FORScan is developed specifically for Ford vehicles. 

Thanks for the tips. It will arrive on Wednesday. Hopefully, I can get more details from FORScan.

On 6/23/2024 at 9:08 AM, unofix said:

The problem with all generic code readers no matter how expensive they are is that most will not read the Ford specific DTC's. 

Ford use two different Canbus speeds and have many hundreds of their own codes. FORScan is developed specifically for Ford vehicles. 

You all are quite right. The FORScan did pick up an extra error code, U1900-20. Does this mean fixing the instrument cluster should clear the issue? 

I also saw that p1549—intake manifold communication control with IMRC output failed may be caused by open circuit, short circuit to ground or battery, or PCM driver failure. Is this linked to the instrument cluster?

My next step is to get someone to fix the instrument cluster, correct?

7 minutes ago, M Lam said:

U1900-20. Does this mean fixing the instrument cluster should clear the issue? 

Very probably. Get the cluster refurbished. 

@rd457

40 minutes ago, M Lam said:

The FORScan did pick up an extra error code, U1900-20. Does this mean fixing the instrument cluster should clear the issue? 

I also saw that p1549—intake manifold communication control with IMRC output failed may be caused by open circuit, short circuit to ground or battery, or PCM driver failure. Is this linked to the instrument cluster?

My next step is to get someone to fix the instrument cluster, correct?

I provide a repair service myself through ebay (https://www.ebay.co.uk/itm/314393033915). Give what I've written there a read. You're welcome to use my service if you wish. Do please check though that your cluster is one affected by the cracked solder joint problem as detailed there. I expect it's a type 2 variant A-D which are affected.

U1900 is a common symptom of the cracked solder joint problem, as are various other communication failures on the CAN bus networks. I can't say for certain how many of these DTCs you're getting would be caused by the problem, nor whether or not the rough idle issue is connected, but if you do have a cluster affected by the cracked solder joint problem, fixing that should definitely be the next step in diagnosing things, then you can at least rule that out and clear out any related codes before moving forward if it doesn't fix everything.

1 hour ago, rd457 said:

I provide a repair service myself through ebay (https://www.ebay.co.uk/itm/314393033915). Give what I've written there a read. You're welcome to use my service if you wish. Do please check though that your cluster is one affected by the cracked solder joint problem as detailed there. I expect it's a type 2 variant A-D which are affected.

U1900 is a common symptom of the cracked solder joint problem, as are various other communication failures on the CAN bus networks. I can't say for certain how many of these DTCs you're getting would be caused by the problem, nor whether or not the rough idle issue is connected, but if you do have a cluster affected by the cracked solder joint problem, fixing that should definitely be the next step in diagnosing things, then you can at least rule that out and clear out any related codes before moving forward if it doesn't fix everything.

Thanks. I will PM you on eBay tomorrow 😀