78 351M Compression
Thread Starter
|
5th Wheeling
Joined: Apr 2003
Posts: 47
Likes: 0
From: Florida
78 351M Compression
Hey yall
I just got a 78 bronco from my brother
it's been in his back yard for 6 or 7 years
now. I towed it home gave it a tune up
and oil change. After getting the fuel tank
cleaned out and the carb primed it fired right
up I drove it around for about 30 minutes
it runs good no knocks or anything but it does'nt
have much power. I did a compression check and found
all cylinders between 148 & 151. Can anyone tell me if
the compression is ok or what compression was when it
was new. I'm trying to decide if I need to rebuild.
Any help is appreciated.
Thank you, Muff
I just got a 78 bronco from my brother
it's been in his back yard for 6 or 7 years
now. I towed it home gave it a tune up
and oil change. After getting the fuel tank
cleaned out and the carb primed it fired right
up I drove it around for about 30 minutes
it runs good no knocks or anything but it does'nt
have much power. I did a compression check and found
all cylinders between 148 & 151. Can anyone tell me if
the compression is ok or what compression was when it
was new. I'm trying to decide if I need to rebuild.
Any help is appreciated.
Thank you, Muff
Elder User
Joined: Sep 2003
Posts: 908
Likes: 4
That's perfectly acceptable compression, and amazing that all the cylinders are so close after sitting for so long.
351Ms don't have neck snapping power to begin with. However, there could have been a pre-existing condition causing it - bad carb, timing off, emissions stuff gone bad, etc.
Check for vacuum leaks and wrongly connected vacuum lines, etc.
351Ms don't have neck snapping power to begin with. However, there could have been a pre-existing condition causing it - bad carb, timing off, emissions stuff gone bad, etc.
Check for vacuum leaks and wrongly connected vacuum lines, etc.
Thread Starter
|
5th Wheeling
Joined: Apr 2003
Posts: 47
Likes: 0
From: Florida
Hey scroob
Good call man
I pulled the timing cover off and found
about 1/2 inch of play in the chain.
I don't know how it stayed on it was
only riding on one side of the lower gear.
Thanks for the tip.
Good call man
I pulled the timing cover off and found
about 1/2 inch of play in the chain.
I don't know how it stayed on it was
only riding on one side of the lower gear.
Thanks for the tip.
Thread
Thread Starter
Forum
Replies
Last Post
muff47
1999 - 2003 7.3L Power Stroke Diesel
3
Jul 18, 2012 06:29 PM
hotrodracer
1999 - 2016 Super Duty
10
Jun 5, 2009 10:52 AM
