I missed previous emails. Whats this in?
THnx
Pat
Barry Schwartz wrote:
> After three weeks (yes I know, but everything takes longer now that I'm
> getting married :-}) I finished installing the fuel injection on the V6.
> The verdict - MUCH better throttle response from part to about 3/4 range,
> no more idle drop when I turn on the H4 head lamps, or when the two cooling
> fans for the radiator come on from the alternator drain. Much improved
> idle mixture as noted from not getting watery eyes when standing too close
> to the exhaust while idling as before (I know :-} but it's happened on rare
> occasion and not in an enclosed space however as I don't idle the car in
> the garage for extended periods). No more rich smell from the exhaust and
> improved fuel mileage, pretty much as I suspected. Not that the Weber was
> that far out of calibration, but the system now has a better handle on
> mixture control and has the capability to make adjustments to the mixture
> in real time that was just not possible before. It's really cool to see
> the fuel exiting in a fine conical mist from the two injectors at idle, and
> then turn to a heavy conical spray when I blip the throttle! The downside.
> . .Full throttle is not correct, it appears to be running severely lean,
> with the motor reacting as if it's running on three of the six cylinders.
> I am not sure if this a temporary condition, in which the GM computer has
> to "learn" this engine, system combination (I doubt it), or a calibration
> condition (which would have to be burned into the chip by someone else). I
> don't think it's a fuel pressure problem (although I haven't verified this
> as of yet) because I installed a new fuel pump, 3/8ths dia pressure, and
> return fuel lines, and a large injection type filter. I did install the
> filter before the pump, between the pump and the tank but I don't feel this
> is a problem because the tank fitting is directly in the bottom of the tank
> and as such is a gravity feed (requiring no priming to start flow). It
> does appear as if there isn't enough fuel at full throttle conditions
> though, and I'll have to see what I can find out. Unfortunately, this is a
> GM computer, and the *fuel maps* are not adjustable via laptop as are some
> of the more complex systems out there. I am just having so much fun
> driving around I haven't bothered to trouble shoot yet! I have written to
> Howell-EFI (which is who calibrated the GM chip for my system) to see what
> they advise-but for now I'll just have to keep my foot out of it!
>
> Barry Schwartz (San Diego) bschwart@pacbell.net
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