rough idling continued

[top_driver]

hi, i was talking about possible things why my car is idling rough performing poorly and delay in revs going down, i changed egr valve and fuel filter, and it pretty much the same, also i got a solution that does up to 6 litres, i added it, and i have 6.5, is that ok

[TWR]

Get the compression checked Top, did this start all of a sudden? I recall you saying something regards the plug leads.

[top_driver]

had the compression checked not long ago all of them just ove 190psi

[TWR]

Do I remember you saying the car was ok before you done a service tops? you said something about the plugs / leads, did you check them all? it's not a five mim job changing the plugs on the 6 potter, did you do it right?

[top_driver]

i did the service and plugs after it started playing up, it was definitely done correctly, could the timing chain need tightening

[TWR]

You would hear the chain rattle if that was the case, are the leads /plugs new?
try a full bottle of Redx in the fuel, take the car for a blast then try.

[top_driver]

the plugs are new, i want to avoid buying new leads unless i really have to, changed the fuel filter and the petrol was black