Low compression.SType 2006 3l saloon

[DURBANBOY]

This is what the mechanic I was referred to has just said ' You have low compression on 4 and 6 cylinders
Hence the slight misfire at low speed'

initially my eml ligjt came on and went in limp mode on and off .He came around and said caused by water coming in and plugs and coils needed  changing .Done that and now he mentioned above .Any opinions welcomed . Mileage is 62000.

Thanks

Anthony

 

 

 

 

 

Edited May 18, 2022 by DURBANBOY
Added further info

[Wrinkly]

20 minutes ago, DURBANBOY said:

This is what the mechanic I was referred to has just said ' You have low compression on 4 and 6 cylinders
Hence the slight misfire at low speed'

initially my eml ligjt came on and went in limp mode on and off .He came around and said caused by water coming in and plugs and coils needed  changing .Done that and now he mentioned above .Any opinions welcomed . Mileage is 62000.

Thanks

Anthony

 

 

 

 

 

Anthony,

What are you asking opinions on. Whether he was right or wrong. Or if you should have changed plugs and coils. You do not state if the car problems have been solved. Was the problem ever diagnosed through the OBD2 connector with a diagnostic unit of some type.

[DURBANBOY]

11 minutes ago, Wrinkly said:

Anthony,

What are you asking opinions on. Whether he was right or wrong. Or if you should have changed plugs and coils. You do not state if the car problems have been solved. Was the problem ever diagnosed through the OBD2 connector with a diagnostic unit of some type.

Hi 

No problems have not been solved,not running that well.Guess my point is there any other path to go ? 

 

[DURBANBOY]

Just now, DURBANBOY said:

Hi 

No problems have not been solved,not running that well.Guess my point is there any other path to go ? 

 

Compression test was done after the fitting of coils and plugs 

[Wrinkly]

3 hours ago, DURBANBOY said:

Hi 

No problems have not been solved,not running that well.Guess my point is there any other path to go ? 

 

 

3 hours ago, DURBANBOY said:

Compression test was done after the fitting of coils and plugs 

Anthony

If  were you I would run a diagnostic test before doing anything else. Get any codes that have come up from reading through OBD2 and report the codes back on this thread. Suggestions would then be more relevant to what the actual problem is showing as.

A cheaper Foseal OBD2 reader, about £20 - £25 on eBay etc will usually adequately read engine faults. I have one I use successfully with my S-Type, although I have a much dearer iCarsoft PRO for other than engine codes.

Good Luck with your current issues . Best Wishes and Regards, John

ly

[DURBANBOY]

20 hours ago, Wrinkly said:

 

Anthony

If  were you I would run a diagnostic test before doing anything else. Get any codes that have come up from reading through OBD2 and report the codes back on this thread. Suggestions would then be more relevant to what the actual problem is showing as.

A cheaper Foseal OBD2 reader, about £20 - £25 on Ebay etc will usually adequately read engine faults. I have one I use successfully with my S-Type, although I have a much dearer iCarsoft PRO for other than engine codes.

Good Luck with your current issues . Best Wishes and Regards, John

ly

Many thanks for reply John .The full story is that when the jag went into limp mode whilst in Dover ,the closest garage was Halfords and they did a diagnostics .See attached .They recommended me to see an auto electrician , not could really tell me the fault .I was recommended by a friend to a mechanic whilst still in Kent and he came around .I showed him the codes from Halfords and he checked the car and removed plugs and said it's water ingress causing problems .He took the car to his place in Chilham ,changed plugs and coils and did diagnostics and he said different codes came up .After doing further tests said 4 and 6 cylinder low compression.I'm back in Surrey and need to go back and sort it out .He recommended me selling it or putting in reconditioned engine .

[JOE-DOT-COM]

hi

going off that last picture, I would say you have a air leak on one bank,

and if plugs were done, hope all the gaskets were changed for new genuine ones, some of the cheap ones don't seal, or its going be a perished pipe

also at 62k engine should still be like new, unless its been really abused and its never had any Oil changes

have you done a compression test yourself, I'd check it yourself and check all the hoses and gaskets while your in there

otherwise take it a different garage and explain what gone on and see what they diagnose, if your not handy with cars yourself, but this is a reasonably straight forward job

cheers

Joe

[DURBANBOY]

35 minutes ago, JOE-DOT-COM said:

hi

going off that last picture, I would say you have a air leak on one bank,

and if plugs were done, hope all the gaskets were changed for new genuine ones, some of the cheap ones don't seal, or its going be a perished pipe

also at 62k engine should still be like new, unless its been really abused and its never had any oil changes

have you done a compression test yourself, I'd check it yourself and check all the hoses and gaskets while your in there

otherwise take it a different garage and explain what gone on and see what they diagnose, if your not handy with cars yourself, but this is a reasonably straight forward job

cheers

Joe

Thanks Joe 

yes gaskets we're done  not original though .Problem is I do not have the diagnostic  readings  the mechanic came up with ,different from Halfords IHe said low compression when he tested  it but he did not give me readings .Will try and get it back to Surrey and get  a jag specialist to look at it .I am not handy at all when it comes to cars  .
 

many thanks