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Tii - Stutter At ~2500 Rpm


hegedus
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Hi,

 

I have a '72 tii (blue) with a new issue, a bit of a stutter or hesitation at about 2500 rpm.

 

The car starts well and idles at ~1000 as it starts to warm up a bit the idle will go to ~1800 for a couple of minutes and then quickly settled to ~1000 rpm.  It surges a little bit until the car is completely warm.  This is reproducible but also not the main issue.

 

In the last week, it has developed a bit of stutter or hesitation upon acceleration between 2500-2800 rpm.  The engine has good compression (~180 psi) and all the linkages have been replaced and the fuel system adjusted by A1 Motorsports in Marin ~4 weeks ago.  Right after the linkage replacement and adjustment the issue was not there.

 

Where should I start looking?

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Believe my KFischer manual says that there is a stutter at around 2500RPM caused by the fuel being pressurized and is unavoidable...mine has a small touch of it too. But correcting a lean condition on mine fixed the surging and most of the stutter...

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