You are running very rich, hence the hesitation and
backfire.  Check your temp sensor.

Z

--- Nock <McNock@EASYSTREET.COM> wrote:
> I own a tiico van, and was getting only so gas
> mileage So I disconnected to 02 sensor and drove
> around for a couple of days.
>
> Not big difference.
>
>
> Well I hooked it backup, it suddenly seemed to go
> from ok to terrible.
>
> I need some help. I didn't do anything!!   What
> happened?  Did something else happened at the exact
> time it did this? HELP!
>
>
> Starts just fine, but simply does not like to
> accelerate.  Idles fine. Bogs down when I step on
> the accelerator. Almost dies. Sometimes backfires.
>
> Once I am patient and get to speed on the freeway,
> seems to hum along just fine, but gutless.  I worry
> about hills.   If I get off and stop, well getting
> going, esp on a hill is terrible. Seems if a get the
> revs up, it "catches" and gets going, but not
> anywhere like normal.
>
> Pulled one set of plugs,  all sooty.  Put some new
> ones in. Same performance. Pulled them a day later,
> and the look ok - may be a little dark.
>
> I have looked for loose wires/broken wires - can't
> find any. I unplugged the o2 sensor again, no
> difference.
>
> Could this be bad injectors/fuel pump? (I have new
> injectors from jetta about 1 month ok)
>
> Fault codes:
> Most Always
> 00533 idle regulations N71 090 adaptation limit
> surpassed (often return immediately upon clearing)
>
> less common
> 00537 Oxygen system regulation, 27-00 implausible
> single
>
> 0524 knock sensor G61, 3100 open or short to ground.
>
> 0561 fuel mixture adjustment.
>     15-10 adaptation limit (add) not reached.

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