85 302 EFI, fired up for a few seconds and died
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From: Wallace, Idaho
85 302 EFI, fired up for a few seconds and died
Like the title states, my 85 F-150 EFI 302 fired up, ran great for about 10 seconds, then just shut down. First thing i did was pull the spark plugs, they are BRAND NEW, 22 miles on them to be exact. They looked great still, put a couple on the headers and had the ole lade crank it over, they sparked up pretty decent.
So i stuck the plugs back in, still wont fire up, so i put a little gas down the intake, no change. just cranks away.
Heres what ive done
Confirmed i do have spark
changed my fuel filter (which was SUPER clean anyways)
dumped gas down the intake
put my multi meter on the injector wire of the #5 cylinder, had no voltage.
fuel pump is running, pumping up in about 1.5 seconds, and shuts down.
little back story. Truck sat for 4 years with a bad trans, swapped out the trans, i drove around the city for the last 2 days, like i said, 22 miles, with no issues. Fired it up tongiht, and i get 10 seconds and she shuts down.
So i stuck the plugs back in, still wont fire up, so i put a little gas down the intake, no change. just cranks away.
Heres what ive done
Confirmed i do have spark
changed my fuel filter (which was SUPER clean anyways)
dumped gas down the intake
put my multi meter on the injector wire of the #5 cylinder, had no voltage.
fuel pump is running, pumping up in about 1.5 seconds, and shuts down.
little back story. Truck sat for 4 years with a bad trans, swapped out the trans, i drove around the city for the last 2 days, like i said, 22 miles, with no issues. Fired it up tongiht, and i get 10 seconds and she shuts down.
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From: Denver Metro Area, CO
Please elaborate on "shut down"... Do all the lights go off and there is no power to the cab? How about the headlights?
Does it act like the ignition key was shut off or does it cough & sputter and act like it ran out of gas?
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From: Wallace, Idaho
it felt like it ran out of fuel, but it did it rather quickly, like the injectors just shut down. tomorrow i will try some ether in it, to see if i can get a sputter.
I still have cab power. Fuses are all good. everything works, starter, lights, radio. everything except the motor wont fire up.
I guess im wondering what tells the injectors to fire? is there a pickup sensor somewhere telling them to fire off? I noticed a distributor sensor that looked like it might be a pickup, similar to that on an old HEI system, but it ran into the harness, so it could be running either the coil or the injectors?
I still have cab power. Fuses are all good. everything works, starter, lights, radio. everything except the motor wont fire up.
I guess im wondering what tells the injectors to fire? is there a pickup sensor somewhere telling them to fire off? I noticed a distributor sensor that looked like it might be a pickup, similar to that on an old HEI system, but it ran into the harness, so it could be running either the coil or the injectors?
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From: Wallace, Idaho
update:
Doing some research I've come up with a possible problem.
Ive got no voltage with key on to my injectors. So i did some research on the 5.0 forums and found that the injectors are hot all the time with the key, and the ground is actually what pulses.
my question to you guys is, does anyone know what drives the +12 to the injectors? Must be some for of injector relay, I keep getting a "eec relay" hit when i search for this topic. Does anyone know exactly where the EEC relay is? I cant seem to locate that via the google machine. If i can find that, then i guess ill have another step to go on.
Doing some research I've come up with a possible problem.
Ive got no voltage with key on to my injectors. So i did some research on the 5.0 forums and found that the injectors are hot all the time with the key, and the ground is actually what pulses.
my question to you guys is, does anyone know what drives the +12 to the injectors? Must be some for of injector relay, I keep getting a "eec relay" hit when i search for this topic. Does anyone know exactly where the EEC relay is? I cant seem to locate that via the google machine. If i can find that, then i guess ill have another step to go on.
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Joined: Nov 2007
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From: Denver Metro Area, CO
Slow down, buddy, give it some time. 
Also, could you click User CP in the top-left and finish filling out your profile so we can see where you're at?
You have a computer-controlled engine and, IMHO, the first place to start is with asking the computer what it thinks is happening.
Here's how:
Ford Fuel Injection » How To Run a Self-Test
Ford Ranger/Bronco II EEC-IV Testing
Also, could you click User CP in the top-left and finish filling out your profile so we can see where you're at?
You have a computer-controlled engine and, IMHO, the first place to start is with asking the computer what it thinks is happening.
Here's how:
Ford Fuel Injection » How To Run a Self-Test
Ford Ranger/Bronco II EEC-IV Testing
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From: Wallace, Idaho
code 24 ACT sensor out of self test range 0.3 to 3.7 volts.
code 21 ECT out of self test range 0.3 to 3.7 volts.
code 21 ECT out of self test range 0.3 to 3.7 volts.
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From: Wallace, Idaho
should also note with those readings as well, its probably about 33* F outside right now, i dont think you can get a good ACT or ECT read below about 55*, correct?
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From: Wallace, Idaho
went out to do a re-test. cranked on it for a few, then tested...still got the 21 and the 24, but also found a 14 in there this time which is
"Two or more successive erratic Profile Ignition Pickup (PIP) pulses occurred, resulting in a possible engine miss or stall."
Ingition pickup might be pooping eh?
"Two or more successive erratic Profile Ignition Pickup (PIP) pulses occurred, resulting in a possible engine miss or stall."
Ingition pickup might be pooping eh?
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Senior User
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From: Wallace, Idaho
went out to do a re-test. cranked on it for a few, then tested...still got the 21 and the 24, but also found a 14 in there this time which is
"Two or more successive erratic Profile Ignition Pickup (PIP) pulses occurred, resulting in a possible engine miss or stall."
Ingition pickup might be pooping eh?
"Two or more successive erratic Profile Ignition Pickup (PIP) pulses occurred, resulting in a possible engine miss or stall."
Ingition pickup might be pooping eh?
Pulled my dizzy out, damn thing was TOUGH to turn by hand, so i took it down to the parts store and replaced the entire thing. Still no fire though.
After rechecking my injectors i found a constant 12 volts on them, so looks like i am getting power now. i pulled the plugs out again, they are damp with fuel, rechecked spark, i have spark. anyone have any ideas?
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