kinda like a couple of spark plug wires are unhooked...

kinda like dirt in the gas...

kinda like the timing is suddenly off...

running fine, then it suddenly started running real rough.  checked carb, seems to work ok. pulled plugs, don't see a problem there. dizzy tight, not suddenly loose and out of place...

what gives?  plan to put a timing light on it to see if maybe the timing has gone off...??

any ideas, suggestions, gremlins I should chase...?!

thanks,,Mark

"God Bless Texas"location: Houston,TX

If it will idle, remove one plug wire at a time and note if any plug wire removing makes no

difference. This will isolate which cylinder(s) is at fault. I would then remove rocker cover(s)

anc check if any pushrods are out of the rocker cup.

55f100

West Monroe,La.

While the covers are off, look for any broken valve springs.

John - "The Hoosier Hurricane"

A lost pushrod comes to mind.  As easy as the valve covers are to remove, doing that would verify that pushrods are all in place and per John’s advice, also look at the valve springs to insure that none are broken.  A stopped up main jet is also a consideration.  When all else fails, put a vacuum gauge to the engine as that may also help to isolate the problem.

Lorena, Texas (South of Waco)

Ok, and don't ask me how I "found" this problem in my own Y-Life. But is it through out the load range, is it low end power or is it top end power? For the longest time my 62 was my daily driver, then i got a new truck and it got parked. Then it became my daily again because it just doesn't break, unlike me "new" truck. So it had sat for a while and I started driving it again, to my dismay at high rpm the engine just started crapping out, many weekends spent looking at this that and the other and i couldn't figure out what it was. So i talked with a friend at the machine shop who told me that it was "probably" just the cam going flat, after all its a 50 year old motor, makes sense right? So I gave up, and here's the part where I tell EVERYONE how stupid I am. I'm driving down the road and look at the dashboard.... what to my surprise do I see? The choke is pulled out about 3/4 of an inch, it made all the difference in the world, trucks running like a champ again. If that doesn't help you, at least I hope you found it amusing.

Spending my children's inheritance one Y Block at a time.

Believe I have found my problem...

on the pass side of the engine, second cylinder from front, the forward rocker arm, valve/spring and pushrod all are just sitting there... no up and down like they should be doing...

I'm guessing this is where my problem is and why it runs... but just barely... with a chug, chug, chug...

now, what do I have on my hands??

guessing I'll have to pull that head off to begin with to find the problem....

does this ring any bells with anyone else?? comments, suggestions, cards of condolences...??

thanks,Mark

"God Bless Texas"location: Houston,TX

Sounds like the cam lobe is a goner. Did the engine seem noisier before this happened? A bit unusual for no movement and no prior noise. Barry

Maybe it's a bent pushrod?? Try to turn it by had, and see if it turns without wobling to the sides. Once I saw the pushrod to get off of the lifter and get stuck just by the side of the lifter housing in the valley. That was caused by a worn adjusting screw on the rocker, that allowed way too much lash. I just replaced the pushroda on the lifter, and installed another screw in the rocker, one that would actually keep the adjustment, and that was about it.

Túlio Lazzaroni "FORD", Florianópolis SC Brasil.

'74 Ford Galaxie 500 292 V8

'82 Ford Galaxie Landau 302 V8

'98 Chevrolet S10 4.3 V6

'01 Ford Focus 1.8 Zetec

can't remember what I can see if I remove the intake manifold and the valley cover...

can I then see the condition of my pushrods and lifters, in case that's where my problem is?

trying to do as little "heavy lifting" as needed to locate my problem.

thanks,Mark

"God Bless Texas"location: Houston,TX

Mark,



After you remove the intake and valley cover, turn the engine by hand.



Look directly at the pushrod and "tappet" for that valve....... If neither are moving when they should, the lobe is flat.



If the pushrod is bent (or it fell off ) , it should be fairly obvious.





post a picture!





Regards,





Rick


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1955 F-600/272/E4OD// Disclaimer: No animals were injured while test driving my F-600 except the ones I ran over intentionally!

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