Won"t hold fuel pressure?

[David Jerome]

YOu have a stuck secondary injector, just fixed a car yesterday with these exact symptoms except it was obviously getting fuel on the plugs. Car would buck like crazy at 3-3400 rpms and stumble and act an ass. Fuel system also was not holding pressure, when I would go to start the car it would about flood and shoot a nice back fire and a ploom of black smoke out the exhaust. Would constantly run rich at idle, then when at 3-3500rpms the car would just act rediculous. Changed out the secondary rail and installed another one with known good used injectors and the car now runs perfectly. First time I applied throttle after changing the injectors it still didnt act right, once the extra fuel was pushed thru the engine and the plugs cleaned themselves up the car now runs perfect.

Originally Posted by phantomworks

I pressurized the system by taking a jumper wire to the gnd and f/p pins in the diagnostic box and turning the key to on position, primes the system to 40psi and when i remove the jumper wire it immediately drops to zero.

OK I'll check the injectors, I'm kinda leaning towards something else though Because when I did my compression check there was no fuel present on the new plugs, and
there is no visible out side leak on the fuel rail when priming system, but doesn't mean there is not a stuck injector .

btw this is only one problem I'm having, the car was running perfect and the next day it would not go WOT past 3500 rpm and would start bucking and back firing. the next day it would not start.

I replaced the TPS, spark plugs and plug wires, and still no start. I had fuel and spark at this time so I went through all my fuses, relays, grounds, and every thing checked out.

So I decided to do a compression check a few weeks later, when I pulled the plugs i noticed I had no fuel on the fresh plugs, they still looked brand new, so I checked for spark again and there was none.
Well this led me to believe that it was the CAS's I pulled and checked them and they read 1.12 and 1.15 ohms which is well within spec but I replaced them with another set anyway and they read 1.14 and 1.19ohms but still nothing. the rpm needle does bounce alittle when trying to start which tells me the injectors are receiving a signal .

The comppresion was good btw I'm pretty stumped at this point