1999 GMC Yukon 94000k 350

I am getting a misfire code on #5 cyl, The rep. said to rebuild or
replace engine.
Was a little reluctant on doing that so I ask for a compression test to

be done. They said that would be $120 so I said OK.. No. 5 was 140lbs

and adjoining cyls was 150. I asked what the dif was between the wet
and dry and he didnt know what I was talking about. After several
calls he got with the mech. and he said they done wet/dry on #5 with no

diff. also a leak down test showed it was bad rings. With these
responses I dont know how good of a job was done on the tests. I
replaced the plugs and the light goes off for a while and then on for a

while. My biggest question is how to rule out other possible problems
before moving on to the bad rings. Such items as EGR valve, bad
ignition, fuel, etc.

Do you have a noticeable misfire, roughness, or just the code?
"chaz" <jkmagic@centralpets.com> wrote in message
news:1156365981.410516.141480@m73g2000cwd.googlegr oups.com...
> 1999 GMC Yukon 94000k 350
>
> I am getting a misfire code on #5 cyl, The rep. said to rebuild or
> replace engine.
> Was a little reluctant on doing that so I ask for a compression test to
>
> be done. They said that would be $120 so I said OK.. No. 5 was 140lbs
>
> and adjoining cyls was 150. I asked what the dif was between the wet
> and dry and he didnt know what I was talking about. After several
> calls he got with the mech. and he said they done wet/dry on #5 with no
>
> diff. also a leak down test showed it was bad rings. With these
> responses I dont know how good of a job was done on the tests. I
> replaced the plugs and the light goes off for a while and then on for a
>
> while. My biggest question is how to rule out other possible problems
> before moving on to the bad rings. Such items as EGR valve, bad
> ignition, fuel, etc.
>
>



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I had a noticable misfire prior to replacing all spark plugs, After
replacing plugs the light was still on and then later it went off. It
is back on again now. I can't detect a roughness now...

Shep wrote:
> Do you have a noticeable misfire, roughness, or just the code?
> "chaz" <jkmagic@centralpets.com> wrote in message
> news:1156365981.410516.141480@m73g2000cwd.googlegr oups.com...
> > 1999 GMC Yukon 94000k 350
> >
> > I am getting a misfire code on #5 cyl, The rep. said to rebuild or
> > replace engine.
> > Was a little reluctant on doing that so I ask for a compression test to
> >
> > be done. They said that would be $120 so I said OK.. No. 5 was 140lbs
> >
> > and adjoining cyls was 150. I asked what the dif was between the wet
> > and dry and he didnt know what I was talking about. After several
> > calls he got with the mech. and he said they done wet/dry on #5 with no
> >
> > diff. also a leak down test showed it was bad rings. With these
> > responses I dont know how good of a job was done on the tests. I
> > replaced the plugs and the light goes off for a while and then on for a
> >
> > while. My biggest question is how to rule out other possible problems
> > before moving on to the bad rings. Such items as EGR valve, bad
> > ignition, fuel, etc.
> >
> >
>
>
>
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