QuestionINJECTORS NOT OPENING, GETTING FUEL TO THEM BUT THEY WONT OPEN, TRUCK WILL START WITH ETHER, IT WILL RUN AS LONG AS YOU SPRAY ETHER, WE HAVE REPLACED THE FUEL PUMP, IGNITION CONTROL MODULE, COMPUTER AND STILL WONT START. ALSO DO THEY HAVE RELAY SWITCHES FOR THE INJUECTORS AND IF YES WHERE ARE THE LOCATED?
THANKS
MARY ANN
Answercan you please tell me why people waste so much money throwing parts at a problem instead of having it diagnosed i know everybody in the world hasn't had a terrible experience with a garage or mechanic.
first injectors do not have a relay them selves only a fuel pump relay
the injectors have two wires on them one wire is hot or has voltage anytime the key is in the run or start positions-the other wire is a ground wire and the ground is supplied from the ecm-note this ground is pulsed it is not grounded all the time only when injector on time which is milliseconds-check and make sure you have voltage on one wire of the injector check one injector on each side as they are wired in banks.
second if you do have voltage check and see if you have spark by pulling the coil wire off of the center tower on dist cap or on the coil hold wire about 1/4 inch from tower and have someone spin over engine check for spark-the same sensors that tell injectors to fire tell the coil to fire also
third if you don't have spark you probably have a stator problem in the distributor-don't rule out a pinched or shorted wire in the injector harness
check all fuses if you have not done so already-check these things and follow up with me.
good luck.
