[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Checking Fuel & Control Pressure (long)
Last night I worked on the '83 CGT again trying to get it to run right. It
now takes about 3 minutes of solid cranking to get it to catch fully, and it
won't run below 1500 rpms without dying completely. Last night I took the
schrick cam back out and replaced it w/ stock cam and timed it properly.
(Didn't help). Background of the problem is I built a new engine for the
car and it has never started properly.
I also built a pressure guage to test the control pressure out of the
following pieces I had lying around:
Fuel injector hose (M8 banjo fitting to F M12 thread)
Fuel return line (M12 banjo fitting to F M12 thread)
Misc. Fuel line (F M12 thread to F M12 thread)
M12 banjo "bolt" with tapped head for M8 banjo bolt (this found on side of a
spare fuel distributor)
M8 banjo bolt.
1/4" M NPT thread water pressure guage
Disconnect the line leading from the control pressure regulator at the
center of the fuel distributor. Connect in it's place on the F.D. the spare
fuel injector line. Screw into the female M12 thread the spare fuel return
line with the male M12 threads on one end and big banjo fitting on the
other. Run the M12 banjo "bolt" through the big banjo fitting and screw it
into one end of the fuel line with the two female M12 ends. Screw the
pressure guage (with some teflon tape 'cause the threads are close but not
perfect) into the other female M12 fitting. Use a M8 banjo bolt to screw
into the top of the M12 banjo "bolt" the line from the control pressure
regulator. Basically you've made a convoluted T with the pressure guage off
one of the legs.
This should show the control pressure. However, when I cranked the car for
about 15 sec., the guage appeared to be on zero. Then it slowly backed off
the back side of the 0 peg. The guage goes up to 100 psi and was reading at
least 150 psi. I find it hard to believe the fuel pump could have put out
10 bar pressure, and the control pressure regulator did nothing. I guess
it's possible something in the guage did not like gasoline...
So, my question is, where can I get a fuel pressure guage that comes with
the right M12 fittings???
Also, could it be true that the guage is reading correct? I've already
swapped out the Cont. press. reg. with one from another car. So I guess it
leaves a problem with either the fuel distributor or return line back to the
gas tank. Any help would be appreciated.
Get Your Private, Free Email at http://www.hotmail.com