Stumbling at high boost... advice needed

[SIMON HOLTBY]

--- "Beatty, Robert" <BeattyR at ummhc.org> wrote: > Hi gang...
> 
> Having some slight stumbling on my 87 5ktq.  It has been chipped and has
> the
> 1.8 bar spring.  

Robert,

When I used to run high boost on my car I found that the spark plug gap
had to be at the minimum gap something like 28 to 30 thou/inch. High boost
seemed to put the spark out. Higher output coil would help I suppose.

I also had to use the zener diode/ resistor mod to fool the ECU when using
higher than stock boost as it was cutting the ignition. This surprised me
as usually it cuts the fuel pump.

Simon Holtby
'84 urq



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