The camshaft. Sounds like the pump is gone or you have dirt in the lines.
Mike
----- Original Message -----
From: "Tom Duffy" <tomuo@pacbell.net>
To: <datsun-roadsters@autox.team.net>
Sent: Tuesday, August 13, 2002 2:30 AM
Subject: What pushes the Fuel pump lever?
> I've looked at the diagrams from the parts manual, but I can't
> see what activates the lever on the fuel pump. Is there a cam?
> Is it under oil? If I take off the fuel pump, will oil start to pour
> out?
>
> I'm having trouble reving the engine over 3000rpm. It revs
> fine when sitting, but when moving, holding the accelerator
> in makes the engine sputter alarmingly. I get the idea that
> the fuel pressure is weak. Sometimes it accelerates smoothly
> though. This all means that keeping freeway speed is
> nerve-racking, sometimes it won't go over 50mph in 4th,
> sometimes I get up to 70mph with no problems.
>
> I'll probably take the car to Mike in SF again, he did a fast
> job of replacing my front calipers, tightening the rear brakes
> and removing the smog pump and air gallery. I had the exhaust
> replaced as well because there was something that looked
> suspiciously like a catalytic converter in line, sitting right
> under the driver's seat. It is highly possible that it was a last
> ditch attempt by a PO (or clueless exhaust shop) to get it
> to pass California Smog.
> Mike even recognised my car as one he'd seen 10 years
> and 2 POs earlier. It was silver at the time, now red, and
> I'm still replacing rubber that has overspray from the too-
> cheap job whomever did on it.
>
> Tom in Sunnyvale, CA
> '68 SPL311
>
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