[ Article crossposted from alt.hotrod ]
[ Author was Brandi Hart ]
[ Posted on Thu, 30 Jun 1994 01:43:30 GMT ]
I have a 78 Blazer that is experiencing fuel problems. I have a fuel
pressure gauge connected after the mechanical pump but before the
carburetor. I am running both the electrical and mechanical fuel pump on
this thing.
The symptoms are as follows:
1.) fuel pressure drops when first starting the engine. (sometimes)
Sometimes if you wait and restart a few times the pressure will
come up.
2.) fuel pressure drops most often after engine has been driven on
on the freeway at higher rpms.
3.) fuel pressure drops on both cold and hot days, dry or rainy.
Things I have tried:
1.) put on electrial pump alone.
2.) used both electrical and mechanical together.
3.) wrapped fueld line (by motor) with heat tape.
4.) blew out fuel lines, cleaned out tank, changed fuel filters.
Questions:
1.) Is this vapor lock?
2.) Could heat collapse/restrict my fuel flow? Where? Remember, it
acts up even when its not hot or up to temperature.
3.) Could this be electrical? The blazer does not have a computer.
HELP!!!!!!
Please email any suggestions to: bra…@slc.unisys.com
THANKS!
Brandi Hart
70 Chevy Corvette
78 Chevy Blazer
68 Pontiac Firebird
