a (friend )said if the pump goes bad the power to the injectors is shut down.is that true?

 

Nope.
There is no feedback between the pump and the injectors. The injectors will try to open even if there is zero fuel pressure. There is no fuel pressure sender on our cars to tell the ECM.

Lou

 

well lou i don't know whats up with this car then ,the fuses are good,i put a new f/p relay on it ,and still no power to the injectors.everything works on this car ,but the injectors.and its firing real well.

 

Do the pink/black and pink wires on the injectors have 12V?
If not, it's a power problem (fuse, wiring).

Do you see no ground pulses on the blue and green wires on the injectors?
If not, it's an ECM or VATS problem (or wiring again).

Lou

P.S.: Please put TBI in your profile. That way, we won't have to search through your other posts every time we reply.

 

ok, i edited my profile thanks bringing it to my attn. it's probably the vats. it's just hard to believe that 2 different vats systems could be bad,2 different ecm.i traced wires,none broke or anything it must be the vats decoder ,cuz,the key measures out with the wires i even did the resistor deal and still no injectors.

 

I'm still not sure what exactly is the problem. Are you missing 12V on the injectors or the grounding pulses from the ECM?

If I can assume it's the grounding of the injectors , you can try grounding pins D14 and D15 on the ECM (with key ON) and checking if that squirts fuel into the intake. If not, it would point to a wiring issue between ECM and injectors.

Lou

 

ok, i will try it in the morning.and post outcome.

 

Nevermind....

 

my injector wires are reb,blue on one side, and green ,white on the other.

 

grouding the pins had no effect.however when i traced my injector wires down the red and white ended up going to a clear looking connector that plugs into nothing.the clear connector ran down by the ecm ,but branched off.i dont ever remember it being plugged into anything.

 

bite my tongue ,the clear ones did connect.now i have power to injectors ,but stiil no fuel.i can hear the pump kick on and everything.i still get no pulse at those other wires ,but when i ground them now i can hear a clicking

 

Alright, progress.

First of all, these wire colors definitely don't correspond to GM wiring diagrams. Not sure what that's all about. Engine swap maybe?

As for the injector grounding. If you have 12V to the injectors (verify with a voltmeter) with the key ON and you ground the OTHER wire on the injectors, does the clicking come from the injector itself? If so, that would mean that they MOST likely work.

Now why aren't they spraying fuel? Did you check fuel pressure at the throttle body?

Lou

 

i order a vats bypass from bakers electronics thats supposed to run the ejectors only,do youi know how these hook up?