[DeTomaso] Stumbeling.

[JDeRyke at aol.com]

In a message dated 7/15/09 2:51:48 PM, gudmundfroiland at yahoo.no writes:

> I have been out crusing a little and if i accelerate with full trottle it 
> pulls good but if i cruse and give full trottle my engine just stumble and 
> wont pull any before i lighten the trottle.When it start pullin i can go 
> for it and it pull strong. Are there any good advise here. No pinging so i 
> belive the timing is right.
> 
Gudmund, what carb do you have? It certainly sounds like a carb/fuel issue, 
possibly from the accelerator pump, which runs against a plastic cam that 
is changeable for tuning. Or if you have a vacuum-activated secondary 
throttle, the diaphragm spring can be changed, maybe to one of lighter strength. 
Holley sells a tuning kit of a dozen springs all of slightly different 
strengths, quite cheaply. Holley also sells a special top for the secondary 
throttle diaphragm that's quickly removeable for such spring changing. The stock 
top inconveniently requires you to remove the entire vacuum chamber to access 
the top and the spring. Cheers- J Detyke


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