[Roadsters] Still stumped

[Dave Cooke]

Now Tim I know for a fact that the speed limit in Southern Wisconsin is well
below your 80mph problem :)

Sent from my iPhone

On Jul 8, 2010, at 6:02 PM, "MH" <twobeaners at earthlink.net> wrote:

> Tim,
> You mentioned in  your original post about this problem, that you had
installed newly rebuilt Z-Therapy carbs. I've heard that at one time there
were problems with their carbs if they installed Grose-Jet fuel float valves
(on Datsun Roadsters, anyway). Apparently, they can and have caused the very
symptoms you describe, due to some kind of vibration problem. I have not ever
used Z-Therapy carbs or Grose-Jet valves, but I thought I'd pass this on. It
might be worth checking out. The Grose-Jet valve uses a ball, looks like a
stainless steel BB. You'll know right away if you check it. More info about
this issue is found on the 311s.org and has been discussed on the 311s forum.
> Mike Hudson  '67 - Stroker / 5-Speed
>
>
> ----- Original Message ----- From: "Tim" <tputland at charter.net>
> To: "datsun-roadsters: autox.team.net" <datsun-roadsters at autox.team.net>
> Sent: Thursday, July 08, 2010 11:00 AM
> Subject: [Roadsters] Still stumped
>
>
>> When I last ran my Roadster, it was still not running right. I had set the
timing,
>> re- balanced the carbs, and fixed the fuel mixture**. After this, it seemed
to be running well pulling strong through all the gears with no ping or
misses. Then, at about 75 or 80 mph, it started to do the hesitation/miss
thing again it was doing last week (when I was about half way home from
MidOhio -- I posted about this as you might remember). Based on what I had
read, I figured it was running lean so I pulled off the road (a few
times--this was last Sunday) and each during each stop slowly adjusted the
knobs and ended up just under a quarter turn to richen the mixture. After the
first and subsequent stops, it was again spitting/bucking/running rough; too
rich now I assume. I went home, re-set the fuel mixture back to where it was
above**. I was still not able to get the spitting and bucking to stop.
>>
>> At this point it was getting too hot for me, both under the hood, in my
head, as well as outside so I parked the car. This is where I am at and have
not looked at the car since last Sunday.
>>
>> When I had checked/"fixed" the timing last week while in Indiana, I do not
think I had done it right: The timing light I was lent was of the fancy
variety with a setting knob that I must have not used correctly. When I used
my light at home, the timing was up over 30 degrees of advance. I am now set
at 16 degrees on a de-smogged 70 1600 running a GB EI dizzy.
>>
>> Any thoughts please.
>>
>> Thanks
>>
>> tim
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