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[Roadsters] High Speed Hesitation / Potential Fix?

To: "datsun-roadsters@autox.team.net" <datsun-roadsters@autox.team.net>
Subject: [Roadsters] High Speed Hesitation / Potential Fix?
From: wattaj via Datsun-roadsters <datsun-roadsters@autox.team.net>
Date: Sat, 2 May 2015 17:49:09 +0000 (UTC)
Delivered-to: mharc@autox.team.net
Delivered-to: datsun-roadsters@autox.team.net
References: <55403C79.1050207@RWMann.com>
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I have been chasing this issue for a while and I am hoping I may have found=
 something but would like your feedback. =C2=A0(Thanks in advance!)
When cruising around 3000 to 3200 RPM, if I press on the accelerator, the m=
otor wants to hesitate or cough, it will eventually get beyond this, but is=
 annoying. =C2=A0I have done my best to tune things and the only thing that=
 helps is making the front carb run very rich.
Today, when dissembling the carbs, I noticed the front carb was missing the=
 Lifter Piston (part #=C2=A016324-10400)=C2=A0that you can use to test the =
lean/rich mixture from the bottom of the carb without having to put your fi=
nger into the throat of the carb. =C2=A0
Could that be creating a vacuum leak and cause of my issue?
Thanks,Alan
67-1600 (with a 67.5 engine)Portland, OR
  
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:He=
lveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;fo=
nt-size:16px"><div id=3D"yui_3_16_0_1_1430588092886_4465" dir=3D"ltr"><span=
 id=3D"yui_3_16_0_1_1430588092886_4642">I have been chasing this issue for =
a while and I am hoping I may have found something but would like your feed=
back. &nbsp;(Thanks in advance!)</span></div><div id=3D"yui_3_16_0_1_143058=
8092886_4465" dir=3D"ltr"><span><br></span></div><div id=3D"yui_3_16_0_1_14=
30588092886_4465" dir=3D"ltr"><span id=3D"yui_3_16_0_1_1430588092886_4643">=
When cruising around 3000 to 3200 RPM, if I press on the accelerator, the m=
otor wants to hesitate or cough, it will eventually get beyond this, but is=
 annoying. &nbsp;I have done my best to tune things and the only thing that=
 helps is making the front carb run very rich.</span></div><div id=3D"yui_3=
_16_0_1_1430588092886_4465" dir=3D"ltr"><span><br></span></div><div id=3D"y=
ui_3_16_0_1_1430588092886_4465" dir=3D"ltr"><span id=3D"yui_3_16_0_1_143058=
8092886_4699" class=3D"" style=3D"">Today, when dissembling the carbs, I no=
ticed the front carb was missing the Lifter Piston (part #<font size=3D"3" =
id=3D"yui_3_16_0_1_1430588092886_4955">&nbsp;</font></span><font size=3D"3"=
 id=3D"yui_3_16_0_1_1430588092886_4954"><span style=3D"font-family: Arial, =
Helvetica;" class=3D"" id=3D"yui_3_16_0_1_1430588092886_4857">16324-10400)<=
/span>&nbsp;</font>that you can use to test the lean/rich mixture from the =
bottom of the carb without having to put your finger into the throat of the=
 carb. &nbsp;</div><div id=3D"yui_3_16_0_1_1430588092886_4465" dir=3D"ltr">=
<span><br></span></div><div id=3D"yui_3_16_0_1_1430588092886_4465" dir=3D"l=
tr"><span id=3D"yui_3_16_0_1_1430588092886_4806">Could that be creating a v=
acuum leak and cause of my issue?</span></div><div id=3D"yui_3_16_0_1_14305=
88092886_4465" dir=3D"ltr"><span><br></span></div><div id=3D"yui_3_16_0_1_1=
430588092886_4465" dir=3D"ltr"><span>Thanks,</span></div><div id=3D"yui_3_1=
6_0_1_1430588092886_4465" dir=3D"ltr"><span id=3D"yui_3_16_0_1_143058809288=
6_5026">Alan</span></div><div id=3D"yui_3_16_0_1_1430588092886_4465" dir=3D=
"ltr"><span><br></span></div><div id=3D"yui_3_16_0_1_1430588092886_4465" di=
r=3D"ltr"><span id=3D"yui_3_16_0_1_1430588092886_5014">67-1600 (with a 67.5=
 engine)</span></div><div id=3D"yui_3_16_0_1_1430588092886_4465" dir=3D"ltr=
"><span id=3D"yui_3_16_0_1_1430588092886_5045">Portland, OR</span></div><di=
v style=3D"font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lu=
cida Grande, sans-serif; font-size: 16px;" id=3D"yui_3_16_0_1_1430588092886=
_4568"><div style=3D"font-family: HelveticaNeue, Helvetica Neue, Helvetica,=
 Arial, Lucida Grande, sans-serif; font-size: 16px;" id=3D"yui_3_16_0_1_143=
0588092886_4567"><div class=3D"y_msg_container" id=3D"yui_3_16_0_1_14305880=
92886_4574"><br></div> </div> </div>  </div></body></html>
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