you're already in trouble mike,
but that won't do any harm ..
not by itself.
they run quite well without an 02 sensor input actually.

better with a good one ..but not that bad with no input there.

----- Original Message -----
From: "Mike Miller" <mwmiller6@ATT.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, September 26, 2011 2:38 PM
Subject: Re: HELP-- 45 MPH @ WOT ???

> O2 sensor? Try pulling the lead and see what happens.
>
> Don't blame me if it blows up.
>
> Mike
>
>
> On Sep 26, 2011, at 2:26 PM, TJ Hemrick wrote:
>
>> I'm going to throw this out there as I'm still having some trouble and
>> perplexing trouble at that.  I've been having some problems getting
>> the van
>> up to speed and holding speed on the highway.  it starts, runs,
>> accelerates
>> fine.  It's a little slow after 50 but right at 60 mph (4k), the
>> engine just
>> stops pulling.  If I give it any more gas, she just winds down.  I
>> have to
>> back pedal to get it up there and keep it there.  It's a VERY fine
>> sweet
>> spot and I have NO power at that speed.  People are blowing by me
>> like I'm
>> going backwards.
>> Here's the crazy part, if I floor it, it bogs down and will ONLY do
>> 45 mph
>> and it has a very slight sputter to it.
>>
>> Here's the scoop: 87 GL, 2WD, Auto, stock 2.1, I COMPLETELY cleaned
>> the fuel
>> tank out for a fresh set of gaskets about 6 months ago, new fuel
>> filter, new
>> fuel pump, new fuel lines from bow to stern (dumped the firewall
>> fitting),
>> new FI clamps and hoses on the injectors, and has been running well
>> (aside
>> from marginal gas mileage).
>>
>> I've been through a few tanks of gas and a bottle of water remover
>> so that's
>> a non issue.--NO CHANGE.
>> I swapped AFM's since it's quick, easy, and I have a few spares. --NO
>> CHANGE.
>> I swapped Air filters (for the same reason as above). --NO CHANGE.
>>
>> I've pretty much given up on a fuel flow or air flow issue as it's
>> at the
>> EXACT same speed/RPM range EVERY time that's plaguing me with the
>> slowdown
>> and it's ONLY when I dump her to the floor that it goes into the speed
>> DECREASE.  It's so counter intuitive to back off the pedal when you're
>> trying to pick up speed.  Especially when just one or two
>> millimeters too
>> much and now you're slowing down due to throttle position and that
>> semi is
>> right at your back door and closing fast!
>>
>> I'm going to check the cap and rotor but anyone have any other
>> thoughts or
>> heard/seen this?
>> It's just so strange that it starts and runs fine at all other
>> points.  I
>> guess I shouldn't completely discount a fuel issue but it's not like
>> the new
>> pump is cavitating ONLY at that speed and every time ONLY at that
>> speed.  I
>> guess it could be a total fuel volume issue but how could it be,
>> again, only
>> at that almost exact same point each and every time?  Seems too
>> specific for
>> fuel.  Electronics are the only things I know of that can be so
>> repetitive
>> and exact.  That keeps putting me back at ignition.
>>
>> Thanks,
>>
>> TJ
>>
>> Yes, I have spare ECM's and AFM's so playing swaptronics is not a
>> problem.