Rough running

[chetwagner at qwest.net]

What year of 2F engine?  I have done the same on a 77 FJ40 with 
stock 2F engine.  Contact me off list so we keep the list clear for 
other traffic.  I am full of helpful solutions to your problems.

On 1 May 2001, at 9:59, TomQ wrote:

> Howdy all, I am having problems with my FI install on my Toyota I6
> motor and was looking for some advice on how to tackle the problem.
> 
> Background:
> I have placed the Chevy TBI from a V6 Astrovan (4.3L) on to the I6
> motor in my Landcruiser (4.2L). My distributor is a DUI HEI unit that
> has the Chevy ignition module in it but the body of it has been
> modified to fit in the Toyota block (basically it looks like a Chevy
> unit to the Computer). I have the timing adjusted to TDC (did it while
> disconnecting the one wire the manual told me to disconnect). One wire
> O2 sensor. Stock ESC. No knock sensor. No EGR. VSS sensor adapted to
> manual tranny. All other sensors are installed.
> 
> Problem:
> When I initially start up the vehicle put it in gear and drive it down
> the road it works great. Nice power, no hesitation, but idles around
> 1k.
> 
> After about 2 or 3 blocks it starts to run horribly. Lots of
> hesitation, sputtering, especially between 1k-2.5k. If I rev it out to
> 3-3.5k it seems to help. It also will stall when I stop. Oddly enough
> after it stalls and I start it up again it runs fine for a block or
> two but then starts to run rough again.
> 
> After around 10-20 minutes or I am guessing when the Coolant (sensor
> is in the head and fluid level is topped off) is fully warmed up it
> runs well. No stalling, no hesitation, there does seem to be a little
> flatness or lack of power in the 1k-2k range, though.
> 
> Newbe guess:
> I used a scan tool and hooked it up to the ALDL and it did not give
> any error codes. Would a heated O2 sensor help? Do I need to reprogram
> the 747 prom? The motor sizes are pretty close so I though I wouldn't
> have to reprogram. What kind of information should I try to get to
> help figure out what is causing the problem or what is not causing the
> problem?
> 
> Thanks for the help..
> 
> -TomQ
> SF,CA
> 
> 
> 
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