Compression: How bad?

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Mar 30, 2012 | 11:22 PM

#31

Rusty_Old_F250

Thread Starter

Fleet Mechanic

Joined: Aug 2009

Posts: 1,771

Likes: 9

From: Western Washington

Well, it looks like I spoke too soon, it is leaking. My mechanic hooked it up to a tailpipe sniffer and one side is running a lot leaner than the other.

One other thing that concerns me is the blow by I'm getting, when I pull out the PCV I can see a definite trail of smoke come out the valve cover, and the motor runs real rough at idle the thing feels like it's trying to shake itself apart.

Sam

Apr 6, 2012 | 11:36 PM

#32

Rusty_Old_F250

Thread Starter

Fleet Mechanic

Joined: Aug 2009

Posts: 1,771

Likes: 9

From: Western Washington

Well, I think we found the problem. And boy, do I feel dumb! We narrowed it down to cylinders 3 and 4, the others seem to be ok. After checking and re-checking a dozen things, my shop teacher pinched off the hose to the brake booster, and lo and behold, the thing smoothed right out and ran great.

Sometimes it's the simple stuff that just really gives you a kick in the pants!

Sam

Apr 7, 2012 | 05:51 AM

#33

Argess

Laughing Gas

Joined: Aug 2008

Posts: 840

Likes: 8

Quote:

Originally Posted by Rusty_Old_F250

Sometimes it's the simple stuff that just really gives you a kick in the pants!

Sam

Ain't that the truth!

Glad you got it fixed.

Apr 7, 2012 | 04:40 PM

#34

Rusty_Old_F250

Thread Starter

Fleet Mechanic

Joined: Aug 2009

Posts: 1,771

Likes: 9

From: Western Washington

Thanks, it's hitting on all 8 now, but I'll take it back to my mechanic and have him hook up the tailpipe sniffer and make sure all is well. I have a feeling it's still a bit lean, it's running a bit warm and it tried to diesel on me this morning.

I have to admit, power brakes are nice, it takes serious muscle to make it stop now!

Sam

Apr 22, 2012 | 08:23 AM

#35

69F-250CS

Freshman User

Joined: Apr 2012

Posts: 44

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Quote:

Originally Posted by Rusty_Old_F250

........my shop teacher pinched off the hose to the brake booster........

Well, I might have the same problem as you did but with cylinders #7 and #8. Some folks say it could be the intake manifold gasket, others say it could be a piston ring, or the PCV and so on...but what I don't get its about the brake booster hose....what do you mean with pinched off this hose?

Thanks.