<VV> 110 Engine Dies at Highway Speeds
hugo at aruncoaches.co.uk
hugo at aruncoaches.co.uk
Fri Feb 2 11:11:33 EST 2018
Blocked fuel cap vent?
On 2018-02-01 20:22, Bill H. via VirtualVairs wrote:
> Hi all, I hope everyone has a happy and successful New Year!
> I have a problem upon which I hope perhaps one of our Vair
> Expertsmight be able to shed some light.
> My car is a 1966 Monza Sport Sedan, with a 110 andPowerglide and
> factory A/C. The ignitionis a CraneCams XR700 and she has a
> Clark’s-sold electric fuel pump along with aHolley fuel pressure
> regulator which sets the fuel pressure at around 3 psi goinginto the
> carbs. The pump is(was) protected bya Revolution Electronics
> controller that sends power to the fuel pump only witha tach signal.
> I fitted an “OK” indicatorlight to show that 12v was being fed to the
> pump from the fuse box. The pump is mounted on the frame rail next
> tothe fuel tank. The fuel pump (andfilter) is brand new, I replaced
> it about a month ago.
> Up until a few months ago, I had the car running as good as
> brandnew. She idled nice and smoothly and couldcruise up to 70 and
> beyond (if I pushed her which, which I don’t. I usuallydrive between
> 55-65 on the highway). Shehandles like a dream with good tires,
> duty shocks, and bushings, etc. allkept in good condition.
> For short distances (less than 50 miles), no problems. Even if I
> start the engine after sitting fora couple of weeks, she fires up on
> the first try.
> What happened was that about 2 months ago on a 100 mile roundtrip to
> my Mom’s(she lives 50 miles away in Monsey, NY), she drove great.
> Just before I reached Mom’s, I felt s “skip”in the engine but it was
> On the way back, I got about 30 miles toward home when allof a sudden
> the TEMP-PRESS and GEN-FAN warning lights went on, and the engine
> died. I coasted off the highway, tried to re-starther. The green
> indicator showed that thepump controller was not feeding 12V to the
> pump, so as an emergency measure I bypassedthe controller to an
> switch (but kept the tach wire connected to thecontroller). Voltage
> was back to the pump and the ”OK” light went back on. She cranked,
> the fuel pump was buzzing, but shewouldn’t fire. I waited about
> 5-10minutes, tried again, she fired up instantly, I got back on the
> highway and shedrove like nothing was wrong.
> 10 miles later, same thing. Had to coast off the expressway, had to
> wait about 5-10 minutes, thenshe started and we were back on the
> way. 5 miles later, same thing. 2miles after that, same thing. It
> gotworse and worse and eventually I got her off the parkway. From
> there on local streets, she drove likeabsolutely nothing was wrong.
> Since thenI haven’t been on the highway with the Monza, but in local
> traffic she drivesperfectly.
> The above (trip to Mom’s) scenario happened twice, exactlythe same
> each time. I’m now afraid todrive her any distance until I can
> isolate the problem.
> Yes, I am aware that I have to add a fuel pump shutoff, butI want to
> isolate this problem first.
> I suspect:
> 1. Fuel pressure regulator? Maybe 3 psi isn’t enough to keep
> the enginefueled at 2500-3000 rpm at highway speeds
> 2. Ignition? Could the electronic ignition fail at high RPMs but
> work fine at lowRPMS?
> Any suggestions would be greatly appreciated!
> Thanks everyone…Bill Hershkowitz
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