Re: [Amc-list] Howell TBI on 232ci '63 Classic...

[Wrambler242@xxxxxxxxxxx]

I'd start by checking fuel pressure as to high a pressure will yield the same results as to large or to many injectors.
Then I'd contact Howell as to what they think may need to be adjusted on sizing or do some web searching as the Howell system was widely used for quite a while, copyied etc.
  Should be a basic open look GM injection unit. Closed loop is the term for running off an o2 sensor with the ecu controlling the mix. Open loop the the computer just looks at a few sensors and runs a set program and damn the results...
   That unit I believe was based on a Chebbie 4.3L system, so injectors shouild be plentiful, just need to finger out which ones! IIRC, even the tbi units on the Renaults and 2.46L Jeep engines used the same injector in TBI systems.
    Welcome to the new world of efi...hope it isn't too difficult to get sorted out!

--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrc II
" Chronic Pain Hurts"

 -------------- Original message ----------------------
From: Tom Jennings <tomj@xxxxxxx>
> It runs! Sort of...
> 
> Man the job took 50 hours. Popped the head, valve job etc, 81 or 83 
> aluminum intake and matching exhaust, then the Howell kit that I bought 
> from Russ. There's crapload of detail! Wiring, plumbing, fuel pump, etc.
> 
> It started right up, but it ran super-crazy rich. White smoke, chugging. 
> Oh I forgot to tighten the hose clamp on the fuel return line, so for a 
> good 5 minutes it dumped excess gas down the driveway... a moment of 
> panic and I ran the hose, about all I could do.
> 
> That fixed, it ran really badly. Too rich. I unflooded it, then on a 
> lark popped the connector off one of the injectors... ran pretty good!
> 
> It's definitely in closed-loop, it drives OK with one injector down the 
> street and back. With two, it chugs, loads up, the CHECK ENGINE light 
> comes on... either injector works, not both.
> 
> It's definitely in closed-loop, I can see and hear the pulsewidth change 
> when I fiddle one, two injectors, rev it up, etc.
> 
> I hope I can figure out how to pick size-smaller injectors. This is a 
> 232, not a 258...
> 
> Anyone foll with TBI systems?
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