Valve Train noise

[kleenair at ix.netcom.com]

rambo at diversicomm.com wrote:
> 
> Mazda:
> 
>      The injectors are firing phased sequential according to the manuel
> supplied with the unit.  I take this to mean that they fire at each TDC
> for each 360 degrees.  Thus preloading the intake.  I tried changing to
> (Batch) mode simultaneous, which is supposed to fire the injectors 4
> time per rev. but it made no difference in the engine, except a
> noticable pulsing of the flex fuel hose, connecting the rail to the
> regulator.
> 
>      I have come to realize that the only way I will cure all the
> problems in this unit is to send it back and regain my investment.
> 
>      What if any system would you suggest I use to replace it?
> I still have the TBI ECU and harness for the 1988 GMC 5.7 L.
> I do not wish to return to carbs.


I personally don't have a lot of experience with aftermarket systems, but 
a couple of systems worth checking out are Haltech and Motec.  You may 
want to call Marren Motorsports at 203-732-4565.  They specialize in this 
stuff.  I have only bought some injectors from them, but I think they do 
alot of this stuff.  Ask for Tim Marren.

Best Regards, Mazda