2000 Sienna Misfiring

**Update** To those of you helping me on the last thread, I'm starting
a new one to tell you of my progress, or lack thereof. I brought my
van to the dealer and had a diag run. The following error codes were
present.

P0300 - Random Misfires
P0301 - Misfire #1
P0302 - Misfire #2
P0303 - Misfire #3
P0305 - Misfire #5
P3171 - System Lean

I have installed new plugs, top of the line Toyota's...New wires...and
one new coil pack, the one that feeds Cylinder 6 primarily. Still
running check engine light on, smoother, but still not right. Any
advice.

Does the Sienna have a code to report lean for each bank of the V6? or
just a generic system lean code?

In any case, the above codes suggest there could be a intake leak -
i.e. intake manifold gasket perhaps... or maybe even a bad MAF?

Nirav

I don't know if that code exists, anyone else?

<cshort@brownelevator.com> wrote in message
news:1134747684.292559.10030@g14g2000cwa.googlegroups.com...[color=blue]
>I don't know if that code exists, anyone else?
>[/color]
The OBD II system will report a lean mixture for bank 1 and/or bank 2.
--
Ray O
correct the return address punctuation to reply

<cshort@brownelevator.com> wrote in message
news:1134740644.624545.206310@f14g2000cwb.googlegroups.com...[color=blue]
> **Update** To those of you helping me on the last thread, I'm starting
> a new one to tell you of my progress, or lack thereof. I brought my
> van to the dealer and had a diag run. The following error codes were
> present.
>
> P0300 - Random Misfires
> P0301 - Misfire #1
> P0302 - Misfire #2
> P0303 - Misfire #3
> P0305 - Misfire #5
> P3171 - System Lean
>
> I have installed new plugs, top of the line Toyota's...New wires...and
> one new coil pack, the one that feeds Cylinder 6 primarily. Still
> running check engine light on, smoother, but still not right. Any
> advice.[/color]

You can now bring it back to the dealer and tell them that the check engine
light is still on for further diagnosis. If their work did not cure the
condition, they should credit you for the ineffective work.
--
Ray O
correct the return address punctuation to reply

I didn't let them do the work, once they diagnosed I said thank you,
bought the parts and did it myself. Saved $400, just don't have a
working vehicle yet.

<cshort@brownelevator.com> wrote in message
news:1134761634.018555.297340@z14g2000cwz.googlegroups.com...[color=blue]
>I didn't let them do the work, once they diagnosed I said thank you,
> bought the parts and did it myself. Saved $400, just don't have a
> working vehicle yet.
>[/color]

You have not saved diddley squat. In fact,you have wasted your money on all
the parts you installed that have not resolved the condition. At the rate
you are going, you will ruin your catalytic converter and can add another
$1000 to your repair bill.

You have posted several requests for advice and information. qslm, a Toyota
Master Diagnostic Technician, and I, a former Toyota district service
manager, have provided you with quite a bit of advice and information. For
whatever reason, you choose to ignore our advice and information and do your
own thing and then when your own thing does not work, you ask for more
information. If you are smarter than the automotive pros, then you don't
need our advice. If you do not trust the automotive pros, then you should
go ahead and take the advice of all the shade tree mechanics who frequent
this group and take shots in the dark.
--
Ray O
correct the return address punctuation to reply

Dear Ray,

I'm posting what's happening in the progression that it occurs with my
limited time and funds. Not knowing your god like status prior I would
have knelt before you and realized I was wasting your time. No need to
be a former Toyota district service manager ass. I will take no
further of your so valuable time and advice.

<cshort@brownelevator.com> wrote in message
news:1134767806.994460.56100@g47g2000cwa.googlegroups.com...[color=blue]
> Dear Ray,
>
> I'm posting what's happening in the progression that it occurs with my
> limited time and funds. Not knowing your god like status prior I would
> have knelt before you and realized I was wasting your time. No need to
> be a former Toyota district service manager ass. I will take no
> further of your so valuable time and advice.
>[/color]

Sorry, I didn't mean to come across as an arrogant ass (even if I deserve
the moniker), however, if you had followed my advice, you would not have
spent any money on parts yet. I do not have any idea who qslm is other than
his signature and his history of being correct and giving excellent advice.
Even if you do not wish to follow my advice, if you ask the regulars in this
group, they will tell you that qslm gives advice that is right on.

If you go back and read my posts in the ng, you may note that I rarely
recommend changing any parts based on the symptoms or conditions that
someone posts or even based on trouble codes. That is because I do not wish
to waste anyone's time or money and because experience tells me that
swapping parts without checking whether they are good or not is an iffy
proposition. What I do recommend is checking parts or systems based on
those symptoms and codes, or in your case, swapping the coils with other
cylinders if you have trouble checking whether the coils are good or not.

good luck on your repairs - you'll need it :-)

--
Ray O
correct the return address punctuation to reply

<<Even if you do not wish to follow my advice, if you ask the regulars in
this
group, they will tell you that qslm gives advice that is right on.>>

Thanks Ray. Didn't know I had that rep around here.

"qslim" <Suckers@suckersdotcom> wrote in message
news:9caea06c8447a992ff7062ca37da38f8@localhost.talkaboutautos.com...[color=blue]
> <<Even if you do not wish to follow my advice, if you ask the regulars in
> this
> group, they will tell you that qslm gives advice that is right on.>>
>
> Thanks Ray. Didn't know I had that rep around here.
>[/color]

You absolutely do with me, and AFAIK, with the other regulars in here as
well!
--
Ray O
correct the return address punctuation to reply

Hmmm. That lean code that you have now is new. I don't remember you
mentioning that in your last thread. That kind of shines a new light on
the whole deal. Assuming that the A/F sensors are reading properly (which
they probably are... otherwise that engine would probably give you another
code), that code suggests that there is too little fuel to have a proper
combustion. If the source of the problem were ignition (which is what the
dealer suggested, apparently), the computer would not tell you that it is
running lean. This is because you would be dumping copius amounts of
unburned fuel into the exhaust. I also noticed that you now have all
cylinders in the 1st bank reporting a misfire... that would make one think
that ignition is not really the issue.
One question about the codes that you listed above; are they new since
you installed all this new stuff, or are they still the same ones that
have been hanging around for a while?
Usually diagnosing driveability problems through the ether isn't
terribly difficult on Toyotas as most problems are consistent through
model runs. 3/4ths of the problems on this board are easy to pinpoint
because we see the same thing on most other Toyotas of the same model.
Sometimes you get wierd ones like this. In this case I would really need
to see a real-time datalist to see where this percieved lean condition is
coming from. I'm kind of disapointed in the factory techinian that
recommended ignition components after seeing that lean code. A real tech
should be able to pintpoint a problem in less that 30 mins by looking at a
data list in real time.
If you want to make a trip to DC I'll plug into it for you.

[email]cshort@brownelevator.com[/email] wrote:
[color=blue]
>Dear Ray,
>
>I'm posting what's happening in the progression that it occurs with my
>limited time and funds. Not knowing your god like status prior I would
>have knelt before you and realized I was wasting your time. No need to
>be a former Toyota district service manager ass. I will take no
>further of your so valuable time and advice.[/color]

This attitude is uncalled for sir, Ray has given you much good
advice and I quite understand his frustration with your methods.

I also agree that you've not saved the claimed ~$400, but have
lost nearly that amount by replacing good parts.

Asking for advice then not following it doesn't sound brilliant.

As Ray says...good luck...
--

-Gord.
(use gordon in email)

"Gord Beaman" <gord@islandtelecom.com> wrote in message
news:01v6q1p83rjvvpi5pqrg2oo36lmmnp15cq@4ax.com...[color=blue]
> [email]cshort@brownelevator.com[/email] wrote:
>[color=green]
>>Dear Ray,
>>
>>I'm posting what's happening in the progression that it occurs with my
>>limited time and funds. Not knowing your god like status prior I would
>>have knelt before you and realized I was wasting your time. No need to
>>be a former Toyota district service manager ass. I will take no
>>further of your so valuable time and advice.[/color]
>
> This attitude is uncalled for sir, Ray has given you much good
> advice and I quite understand his frustration with your methods.
>
> I also agree that you've not saved the claimed ~$400, but have
> lost nearly that amount by replacing good parts.
>
> Asking for advice then not following it doesn't sound brilliant.
>
> As Ray says...good luck...
> --
>
> -Gord.[/color]

Gord and I agree.

"A fool and his money are soon parted"
-

- Philip

The lean code didn't appear until I changed the plugs and coil which
were indeed bad despite the ramblings of some here. It has 71k on it,
and the mechanic I spoke with today recommended changing the fuel
filter, as Haynes manual recommened as well. I got the old filter off
and the new one is impossible to get on. The intake end will NOT
thread despite my best attempts. Any advice?