Fuel pressure only just under 50 psi... 54 psi max with repeated key
Dump a small amount of fuel onto throttle plate, pop the top back on, and it
fires right up.
Cranking when it won't start drops the fuel pressure down around 40.
Pain in the Butt!!! See NO easy way to determine if it's actually the pump
or regulator, as I don't imagine one can pinch off one of those plastic
return lines????????? Seems I will either have to unhook the fuel lines
from the injector (a real pain if it's like the V8's where you have to
unclamp the lines down the back side of engine) and then jerry-rig a
connection directly to the fuel line. Or, drop the tank and rig up a line
feed from the pump directly to the gauge. Either way, hate messing with
this "stinking" dangerous stuff : ). What pressure it does generate seems
to hold steady. It leaks down eventually, but my stupid fuel gauge
connection doesn't seal 100% to hold pressure for hours... I'm thinking
I'll go with dropping the tank to check it, as I think the fuel pump itself
is the most likely culprit, where as if the pressure built a little higher
but dropped quickly I'd be more concerned with the regulator. Of course,
will investigate plug connections as well. Pump "sounds" normal when
cycling key. It's consistent so it doesn't strike me as an electrical
fault, but remains a possibility.
Then, if diagnosis is such, next will be what to do for parts. I'll check
with dealer, and price out aftermarket options as well. Price is an obvious
factor, but so is availability. I've read bad comments on airtex, yet have
had no problem with airtex in the past but for other applications!
Experiences there would be appreciated. Is "replace pump only" even an
option, or is it strictly "assembly" only.
Thanks, will update...