Scanner problems

[Bruce Plecan]

-----Original Message-----
From: Jason Weir <jweir at worldnet.att.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Wednesday, July 01, 1998 8:05 AM
Subject: Re: Scanner problems


>Bruce Plecan wrote:
>
>> That doesn't seem to make any sense.  I wouldn't venture a quess
>> why that could, happen.  Maybe a calibration thing from Howell
>> for not running EST?.  Geez, that is strange.
>> Bruce
>
>Might that cause the extremely rich condition? the engine thinks its
>under load?  If I unkook the MAP sensor at idle, it reports 30 inches
>and trips a code 33 as it should?

Try switching power and ground.  At atmosheric conditions it should 
be over like 4.8v, on the sensor line......  That or ya get a barometric
sensor, or something strange in there
Bruce

 But I will try a new MAP sensor and
>give howell a call, me thinks that I will dump the howell chip and get a
>stock GM 4.3 chip and go from there, I have no idea what they did to
>that chip, maybe I can talk them out of the bin that they used...yeah
>right, anyway thanks again, Jason
>
>--
>Jason Weir - 88 YJ - 258 / Howell TBI  145K and counting
>Fayetteville, North Carolina
>JTW Web pages at http://home.att.net/~jweir
>mailto:jweir at worldnet.att.net
>
>
>