97 Cougar Problem

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Adam - 06 Jan 2006 10:37 GMT

We have a 97 Cougar with the 4.6v8, I have a question, this engine will
crank over, but it backfires through the throttle body, even more when
starting fluid is added. Could this car have jumped timing? A Friend said
it had a blown head gasket.....Could this be true?

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Backyard Mechanic - 06 Jan 2006 13:30 GMT

> We have a 97 Cougar with the 4.6v8, I have a question, this engine
> will crank over, but it backfires through the throttle body, even more
> when starting fluid is added. Could this car have jumped timing? A
> Friend said it had a blown head gasket.....Could this be true?

That could be true... sometimes a Head gasket can fail between cylinders,
and the only indication is as you see.

Suspect valve or spark timing first, though

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Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

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Adam - 06 Jan 2006 15:52 GMT

I figured maybe it had jumped timing, because it still will fire but it
seems like its at the wrong time...If it is the timing chain/gear worn out,
will that hurt the engine? Can it be fixed without internal damage?

>> We have a 97 Cougar with the 4.6v8, I have a question, this engine
>> will crank over, but it backfires through the throttle body, even more
[quoted text clipped - 5 lines]
>
> Suspect valve or spark timing first, though

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Backyard Mechanic - 06 Jan 2006 17:03 GMT

> I figured maybe it had jumped timing, because it still will fire but
> it seems like its at the wrong time...If it is the timing chain/gear
> worn out, will that hurt the engine?

Could be or maybe not.. there's a thing called a 'leak-down test' that
would determine if valves are bent. Or headgasket fail between cylinders.

> Can it be fixed without internal
> damage?

Probably

Note: You arent going to get comprehensive help on the entire problem and
solution/repair, here. There simply isnt time or energy. The answer is
to get a book, or the shop CD off ebay... and figure things out for
yourself.

Further info may be on

http://www.lincolnsonline.com/

Or

http://www.crownvic.net/ubbthreads/index.php

Because it's the same engine

Signature

Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

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Adam - 06 Jan 2006 18:08 GMT

yeah I know I cant get ALL the help here I need I just wondered if it could
have possibly hurt the valves or not because I was told this wasnt a
"free-turning" engine.

>> I figured maybe it had jumped timing, because it still will fire but
>> it seems like its at the wrong time...If it is the timing chain/gear
[quoted text clipped - 22 lines]
>
> Because it's the same engine

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