[Diy_efi] Hesitation

[Scott Scott]

Thanks for the reply.  So the EFI system creates its
own virtual accelerator pump of sorts? Makes sense, a
little extra fuel to compensate for the higher demand.
 

What do I do to diagnose this and correct it?

Thanks


--- Mike <niche at iinet.net.au> wrote:

> Any transient mixture enrichment on rate of change
> of throttle position ?
> 
> Even the oldie hitachi/bosch ecu reads rate of
> change of throttle
> position and intersperses extra injection pulses to
> act like the
> old accelerator pump of the carbie days, seems like
> you have
> that issue from your description as you report its
> more than
> noticable when on load - that is when its most
> apparent...
> 
> rgds
> 
> Mike
> 
> 
> 
> At 01:33 AM 6/28/06, you wrote:
> >I just put a TBI setup from a 1991 Silverado onto a
> >1969 Mustang with a 302 (2bbl).  It runs well,
> idles
> >smoothly, but I have a couple of issues.  
> >
> >1?It has some hesitation on acceleration.  Not when
> I
> >rev it in the garage, but when its in gear.  Timing
> is
> >currently set at 10 degrees BTDC (base timing), I?m
> >thinking of adding a little more advance to it. 
> Any
> >other ideas?  It actually stalls out sometimes when
> I
> >try to make a fast getaway.  
> >
> >2?I put the ECU under the dash.  I reached in and
> put
> >my hand on the box  after I had been driving a
> while,
> >and it was VERY hot to the touch.  I almost
> couldn?t
> >hold on to it.  Is this a normal operating
> condition
> >of the GM ECU?   
> >
> >Any tips are appreciated! 
> >
> >
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> 
> Regards from
> 
> 
> Mike
> Perth, Western Australia
> VL Commodore Fuse Rail that wont warp or melt !
> Twin tyres for most sedans, trikes and motorcycle
> sidecars
> http://niche.iinet.net.au
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