1984 xj6

So do you or have you checked for any codes in the computer?

No I have not

Thats your first step let me know what codes you have.

Don't mean to be stupid , but where do I get the codes

Its not a stupid question there isn't a lot of info on that old of a jag available to me.I'm trying to find that info so when it cuts out looses power and stalls does it do it every time you try to accelerate?Also when it stalls does it restart right away?

Yes it starts but that's it . Won't move , if I wait about 15, it starts and I can move a short distance , then it cuts out again. I hope I made sense

When you say it will start but won't after it dies what do you mean?Is the transmission inop no gears or is there just not enough power to move the car?

Not enough power to move it pops and stalls out

Do you have a cat on the exhaust of the car?You could have a exhaust restriction.

yes it does have a cat, is there a way to test them .

Take it to a exhaust shop or you can get a back pressure gauge and un*********r o2 sensor and put the tester in there then you would rev it up in park to like 3,000 rpms and get the reading.

Ok I will let u know

Keep me posted

I may have found the problem the spark plugs are saturated with antifreeze

You found the problem you have a blown head gasket or a cracked head most likely you will have to have the head pressure tested once it's removed.You never mentioned any steam out the tail pipe before so i never suspected that.

i never noticed any steam from the tail pipes. I just decided to check the plugs today and found them wet. I dried them and started the car, it was good for a few seconds and them it started. I pulled the plugs and the were wet again. The car sat for ninteen years, so I am hoping it is the head gasket.

You left the sitting for 19yrs part out i hope it's just the head gasket too but make sure you have the head pressure tested also.Let me know what you find.

What else could it be

Most likely your looking at a blown head gasket or cracked head.Otherwise you could have a cracked block the only other thing i can think of is the intake gasket is some how letting coolant into the intake ported then into the combustion chamber.