stuck, ive tried everything- Need help

[skater488]

i opened the hood up and there was gas leaking on the driver side exhaust manifold and i noticed that there was gas spitting out of my exhaust pipe and out of the whole in my muffler, i thought that maybe one of my injectors was stuck up and and it was dirty so i had all 6 cleaned and tested they were all good, i changed the gaskets and i put it all together and it didnt make any difference so i tested it with the pressure tester and idling it went up to 35 psi and i turned the engine off and its suppose to be at a minimum of 30 psi after 5 minutes according to haynes manual and i watched the pressure bleed off,
i dont know what else it could be any suggestions?

 

[Sedition]

As for the gas leaking down onto your exhaust manifold I would say one of your fuel lines are leaking somewhere around the top of your engine.

Do you think that may be one of your cylinders are misfiring and this is where the unburned fuel is coming from out of your exhaust?

 

[Turdle]

I am calling this as a short circuit in the fuel injection wiring-or a bad ECM

Your 93 has a batch fire injection system, which means all 3 injectors fire together. It doesn't make sense but it does work.

Each bank gets it's own signal through a parallel circuit. 12v is applied to both leads of the injector-when one side goes low the injector fires.

if there is a short circuit on one , it will go low and cause the injectors to spray continuously. The injector wiring connects under the alternator-I would start there with my meter as it is the center of the circuit. This will tell you which direction to go. If you do find a shorted circuit-be sure to disconnect the PCM and read again. if the short goes away the pcm is probably faulty.

I have seen corrosion in the injector harness right at the point where they are factory spliced . Look for signs of verdigris on the wires

 

[skater488]

no i dont think its misfiring, i turned the truck on and let it idle for a sec and it sounds good like nothing wrong but i can see the the gas is coming from the cylinders just from where its leaking out of the exhaust manifold

 

[skater488]

Turdle:

its not the ecm because i just bought a new one because a 513 code came up on my trouble codes so i replaced it along with this problem thinking this would fix the problem and it didnt

 

[skater488]

tell me more about the short circut where is it the wire located at, should i take my alternator off and check for corrorsion?

 

[Turdle]

You will probably need a wiring diagram. A chilton's manual will sure help.

 

[skater488]

is it the same wire that the fuel injectors are hooked up too?