running rough

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thecrew2999

3.2 MTX SHO
Joined
Apr 14, 2006
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Harrisburg/WilliamsportPA
well got an update on the rough idle and all...

i thought it was the fuel pump and shoulda checked the fuel pressure instead of assuming but it was giving me codes saying that and all... which im gonna recheck now but anyways i changed the fuel pump and found out the one in the tank already was a walbro (doh) and when i put the new one in same deal, bad idle where it drops down to 500rpms and wants to die but does back up and down and sometimes stalls.

now im thinking dirty injector or clogged or maybe bad but im not sure how to find out without replacing them, i mean i think in this whole process i mighta got them a bit dirty so its hard to say.

anyways in the process or this new pump swap i broke both bolts for the gas tank straps and was damn happy about that so happy i spent the next 3 hours calling around tyring to find new c clips and bolts to hold the straps back on.

well i guess if anyone wants one i got a walbro im willing to part with...... ARG!

any ideas on what might be causing the car to run like this? mind you i cant do the code test where the cars running it for some reason just dont wanan let me.
im gonna go pull the codes yet again see what i get
 

thecrew2999

3.2 MTX SHO
Joined
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Messages
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Location
Harrisburg/WilliamsportPA
ok ran the codes and got the same ones... transmission ones im ignoring and the egr also... but even after resetting the comp by disconnecting it for over 20 mins i get code 543 which is

543 (O) Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits
(M) (Service 556 code first if present) Fuel pump relay or battery power feed was open - Power / Fuel Pump Circuits

no clue why... any help... might it still be dirty injectors or bad or something? im gonna get the tank back up then take the intake and injectors off...


how should i test the injectors? i got a volt meter but i dont know what volt it should be and all that, can i just blow threw the injectors to clean them out ?
 

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