"cea1" <[email protected]> wrote in message
news:[email protected]
>I have a 1995 Toyota Avalon that has a persistent miss, that according to
> the Diagnostic Tool is P3040 (Misfire detected on cyclinder 4), I was
> supplied this code from my local Advance Auto Parts Store. After not being
> able to figure out, on my own, what was the problem with the cyclinder, I
> took it to the Toyota dealership, the mechanic at the dealership seems to
> think that the problem may be with the valve seal guides or a stick piston
> ring in cyclinder four. The compression check on this cyclinder is much
> lower than the other cyclinders. My guess is that the problem is the valve
> guide seal, and the reason I think so is because sometimes after letting
> the car set for a few hours and when it's started smoke comes from the
> exhaust.
>
> Anyone, what's your take on this issue?
>
The technician who looked at the car has a big advantage over everyone here
since he or she was able to examine the general condition of the car and
engine.
The tech should have been able to get a general idea about the condition of
the rings by seeing if the compression improves in a wet test.
Leaking valve stem seals will not in itself result in lower compression
although smoke out of the exhaust is a symptom.
--
Ray O
correct the return address punctuation to reply
news:[email protected]
>I have a 1995 Toyota Avalon that has a persistent miss, that according to
> the Diagnostic Tool is P3040 (Misfire detected on cyclinder 4), I was
> supplied this code from my local Advance Auto Parts Store. After not being
> able to figure out, on my own, what was the problem with the cyclinder, I
> took it to the Toyota dealership, the mechanic at the dealership seems to
> think that the problem may be with the valve seal guides or a stick piston
> ring in cyclinder four. The compression check on this cyclinder is much
> lower than the other cyclinders. My guess is that the problem is the valve
> guide seal, and the reason I think so is because sometimes after letting
> the car set for a few hours and when it's started smoke comes from the
> exhaust.
>
> Anyone, what's your take on this issue?
>
The technician who looked at the car has a big advantage over everyone here
since he or she was able to examine the general condition of the car and
engine.
The tech should have been able to get a general idea about the condition of
the rings by seeing if the compression improves in a wet test.
Leaking valve stem seals will not in itself result in lower compression
although smoke out of the exhaust is a symptom.
--
Ray O
correct the return address punctuation to reply