help...urgent problem with injector code.

[bensbaby_1]

hi.
i have 1000cc pte injectors and there 3rs old tops. today i was changing spark plugs and replaceing exhaust gasket and i cleaned my battery terminals..and i started it up to back it out...running good.
i go to drive it up the street ....runs like crap 3 cyls and throws code 41 injector code...i have mmcd so i check it its cyl 4.closest to tranny.

i unplug the wrining connectors and they all work except for 4.
i trested my inj 3 ohms like it should...

i tested my plugs and i got a strange reading...

ideling i got 4 4.5 volts but on the one thats messed i got 10-12 volts? wtf??????

im soooo lost...?????

how can i have a dead cylinder when the inj is still firing???

pls help me....

mabye its my stage 3 keydriver chip toast?
mabye my eprom ecu toast?

any ideas?

plsssss

 

[bensbaby_1]

i had a broken wire when i pulled back the casing to see...i fixed it and now it runs sweet agin.

 

[cbrfrenzie]

i had a broken wire when i pulled back the casing to see...i fixed it and now it runs sweet agin.

I had the EXACT same problem. After pulling the rubber boot off of the injector connector, one wire was broken, yet sitting right next to its opposing broken part. The capacitance between the two connections will still give you your 12Volts, but if you were to put an scope on that injector line, you would see a capacitive discharge, rather then the usual fly back spike upon discharge. This means the injector is getting energized, but not opening.

Pull the boot and make sure your wires are snugly connected.

Next I would check the ballast resistor pack, and finally the driver outputs on the ECU if nothing else is found. Make sure the ground on the ECU isn't blown ie. the trace on the board smoked from a short.