FI TECH ULTIMATE not getting injector signal
I just installed this system on a new build and I am having trouble getting any signal from the computer for any of the injectors .
We have checked grounds = Good ( Double checked and cleaned all surfaces again)
Checked Spark = Good
Fuel Pressure = Good 62psi
Getting Crank signal = RPM 120-150 cranking (verified I have 24x sensor)
I borrowed ecm from a friend that has system not installed yet =Still same issue
Tried multiple times on installing tune into computer = Still nothing
I got a pinout from Fi Tech and checked every injector output and get nothing (If I ground the wire for injector with a Power probe it will click the injector )
Car starts right up with shot of starting fluid in throttle body
I will take any suggestions on what to do next I am at a loss on this thing
Try unplugging the CRANK sensor and CRANK engine putting it into limp mood this loads a base run programs.
Not sure how long I need to leave unplugged but I left it unplugged for 5 minutes then cranked it unplugged for 10-15 seconds, then plugged it back in still nothing.
Did u node light the CAM sensor. Voltage, gnd and pulse sígnal. I have the same system in my 55 pro street. Have had problems with 2 new CAM sensors .
I am going to pickup a new cam sensor tomorrow and have it and will check the wires and see what we got. Did you lose all injector signal when the cam sensor went bad?
Some plugs misfiring. Some try some wet moved around.
Well cam sensor did not help I did not think it would because it should still fire some of the injectors. I have a friend coming over tomorrow to take and look and I will report back unless someone else has ideas Thanx 55prostreet for the ideas
I’m having the exact same issue. With no luck I might add. Did anyone find some suggestions or solutions?
71Blazer, sorry to hear of your problems.
As you say you have good spark, I doubt it's a fuse problem however I'll include the fuse layout for reference.
As each injector is full time powered with 12 volts, you should be able to confirm this while cranking, probe a DVM between an injector plug terminal to ground, try them both.
If you have zero volts to ground from both of the terminals, you may have a harness wiring problem. If you do have 12 volts from one, during cranking, move on to this next test:
The ECM controls the injectors with grounds so if you connect a small lamp or noid test light to the injector plug, you should see it pulsing while cranking. This video shows it pretty clearly, jump to 2:00: https://www.youtube.com/watch?v=5MmR-wXddVw As you're engine won't run on it's own, this test can also be done during cranking. Make sure your battery is fully charged.
If there's no signal (lighting of the noid light) at the injector plug(s), I would say you have a harness wiring problem.
Also for reference, the harness injector plug pin-outs are as follows:
1-Black; 3-Tan; 5-White; 7-Red
2-Green; 4-Orange; 6-Yellow; 8-Blue
These are six pin plugs, one pin is not used. The color wire not noted above would be the 12 volt power feed to all four injectors per plug. Also note, the colors in the injector harness itself may not match the color code of the main harness.
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Quote from justinlagestee on January 18, 2020, 5:29 pmI’m having the exact same issue. With no luck I might add. Did anyone find some suggestions or solutions?
Hey Justin any luck....im in the same boat i checked everything that Paul Bell mentioned and still no Luck. I spoke to Rodney from FiTech but we still havent figured out my situation