Hello again quick question when are the injectors supposed to spray . I turn the switch on but not try to start some of the injectors spray and some dont and the fuel rail will not hold pressure they spray only in the start position correct and what should i buy if i replace them all it is a factory stock 350 LT1 96 Z 28

 

mine did that when my fuel pressure was high. i did have the injectors cleaned and flow tested and replaced the fpr to fix.

 

Ok thanks i will check on that i did clean them and replaced the FPR and vacuum hose going to the FPR if i were to just replace them what is the pounds number i am looking for are the stock ones 24 pounds or higher and how far can i go with out causing problems

 

stock should be fine. not that much to have them cleaned and flow tested at an injector shop. much cheaper than new ones and you know they are flowing the same. new injectors do not usually flow same, they are within factory spec's and vary which can effect performance. at 47 your at the upper end of the acceptable pressure. i am wondering if the fuel pump is acting up and has something to do with it. maybe spiking to due to a failing relief or check valve.

 

opps ment 47, corrected ^^^

 

I have not checked the fuel pump i have read the check valve in the pump could be stuck open not letting it build pressure in the fuel rail

 

i did have issues with fpr as well, went through a couple before i got one that would hold pressure. replaced pretty much everything including fuel pump and it still lost pressure pretty fast, not so bad as yours, i ended up clamping off the return line, small plastice fuel line and it held pressure,,, fpr was not holding. was very carefull, pulled the fuel line cover back to get to fresh plastic that i was hoping would not crack and it didn't, i covered it with a doubled over piece of cardboard and clamped with a pair of wide vice grips, im sure it helped that it was warm out

 

Ok i will check out these injectors then see about the FPR and the fuel pump sooner or later I hope i can get a handle on this thing the pump is pumping it up there pretty quick then it drops very fast it has to be going somewhere

 

so your getting good spark? be a bummer to go through all this to find the opti was goin. seems like with fuel coming out the injectors without turning to start would sorta take fuel outa the picture,,, i had to change my oil a few times when mine was shooting the fuel out. oil smelled bad of gas. it would start but wouldnt idle worth a crab

 

yea i just replaced the opti not long ago i feel like that is working it seems like it is not getting the fuel it needs it will be a few more days before i can work on it i hope that opti is not the problem i hate taking that off again