LairdScooby

Pen

Gunshot

Channel

River

Welcome to the forum Gwilym!

Welcome aboard Matthew! Still a relative newby myself but it's a very friendly, helpful forum, hope your Jag serves for well for a very long time!

I would say if it fits your criteria for your next car then yes. They always seem to get good reviews, even from those reviewers that are somewhat scathing about British cars. All depends exactly what you want but you shouldn't go too far wrong. 😉 😄

Affluent

Lottery

Handful

Tenacity

Dogs

Basildon

Spies

Kinks

Have you tried the same app on a smartphone or computer? Just wondering if the problem is with the app itself and/or the peole that provide it rather than being a car problem.

Island

Might be worth cleaning that out using caarb/air intake cleaner or even renewing the PCV valve to reduce the pressure the oil is being blown up by. A 6" diameter puddle of oil won't actually be that much, a little goes a long way when it's spread out on the ground but it's still too much really.

Forgot to ask, after soaking the bores in oil, did the compression on the other 4 cylinders improve?

Clothesline

That sonds very much like the dizzy cap is dirty and tracking is occurring - in other words you're getting a spark at the correct time and then as the rotor distributes sparks to the other plugs, dirt is providing a track across the cap to the one plug giving a spark. Have you also verified that when #1 cylinder is at TDC, the rotor is pointing to #1 segment in the cap and that the leads are on the cap in the correct order? A closed points gap could also have caused this, the points may only just be opening just enough to give a spark but way too late - worth checking the gap and then re-checking the static timing too.

Silly question before you decapitate the engine, are you sure you have a spark and that it's happening at the right time? Sometimes if an engine has been laid up for a period of time they are reluctant to fire even with seemingly good compression because the spark is weak. Also is fuel getting through not only to the carbs but through the carbs? Sticky needle valves/floats can cause problems in this area as can gummed up choke mechanisms, especially those that don't just lower the jet on the carbs but open a rotary valve with different drillings for enrichment.

Thanks for that explanation, i'll have to go through mine and see if there are any imminent problems but given the general behaviour of the engine, i'd say not. I do keep an eye on the breathers on all my cars though, it's wasted horsepower and fuel having them blocked.

Mainframe

Maybe i'm being thick here but i can't see how what you're suggesting can happen - can you explain please?