No Injector Buzz, No Start
Thread Starter
|
New User
Joined: Jan 2018
Posts: 8
Likes: 0
No Injector Buzz, No Start
My 2004 Ford F250 shut off while I was driving it.
It won't start and when I turn the key the injectors will not cycle and there is no Buzz.
There aren't any codes in the computer.
I've run the injector cycle test from my Snap On test box and it fails.
I've gone through the no Start check list and the truck passes except for the KOEO Injector Buzz test.
Even though the FICM passes all tests and has all the proper voltages I swapped it with a FICM from a running truck and still there is no start, no injector Buzz, and it fails the injector test.
What conditions have to be met for the KOEO Injector Buzz test to run?
It won't start and when I turn the key the injectors will not cycle and there is no Buzz.
There aren't any codes in the computer.
I've run the injector cycle test from my Snap On test box and it fails.
I've gone through the no Start check list and the truck passes except for the KOEO Injector Buzz test.
Even though the FICM passes all tests and has all the proper voltages I swapped it with a FICM from a running truck and still there is no start, no injector Buzz, and it fails the injector test.
What conditions have to be met for the KOEO Injector Buzz test to run?
Fleet Mechanic
Joined: Feb 2007
Posts: 1,652
Likes: 79
From: Mooresville, NC
My 2004 Ford F250 shut off while I was driving it.
It won't start and when I turn the key the injectors will not cycle and there is no Buzz.
There aren't any codes in the computer.
I've run the injector cycle test from my Snap On test box and it fails.
I've gone through the no Start check list and the truck passes except for the KOEO Injector Buzz test.
Even though the FICM passes all tests and has all the proper voltages I swapped it with a FICM from a running truck and still there is no start, no injector Buzz, and it fails the injector test.
What conditions have to be met for the KOEO Injector Buzz test to run?
It won't start and when I turn the key the injectors will not cycle and there is no Buzz.
There aren't any codes in the computer.
I've run the injector cycle test from my Snap On test box and it fails.
I've gone through the no Start check list and the truck passes except for the KOEO Injector Buzz test.
Even though the FICM passes all tests and has all the proper voltages I swapped it with a FICM from a running truck and still there is no start, no injector Buzz, and it fails the injector test.
What conditions have to be met for the KOEO Injector Buzz test to run?
Open or short injector circuit <---------
Injector connector - lower likelihood as each bank is "bundled" on the harness/FICM connector and they generally fail "per bank"
Injector solenoid
FICM power -- appears to be ruled out by scan
FICM ground circuit <---------
FICM -- appears to be ruled out by your swapping
Data List (in addition to CMP, CKP inactives/faults, IPR output ckt fault, FICM enable fault (possible PCM -- EVEN WITH NO DTCs), PARTIALLY CLOGGED SCREENS:
11.5V MIN IGNITION
FICMLPWR 8V Cranking
FICMVPWR 11.5V MIN IGNTION ON
FICMMPWR 45V MIN
RPM 100 MIN <---------
ICP 500PSI
ICP_V .80V MIN
IPR 45V MIN
IPR Greater than 60%
ICP 1500PSI MIN <---------
Fuel PW 500us - 2ms
FICM SYNC Yes/No
Thread Starter
|
New User
Joined: Jan 2018
Posts: 8
Likes: 0
Thx for your response I reviewed your Data List and in my testing I have met or exceeded all of the parameters listed.
The cranking rpm goes well past 120 rpm on a cold day and I have seen ICP pressure in the 1900 range.
I think the key symptom is the Pre-Cycle test does not run when KOEO and when I command the injector test with my test box it fails.
I agree with you that is appears to be Electrical or Command related.
The cranking rpm goes well past 120 rpm on a cold day and I have seen ICP pressure in the 1900 range.
I think the key symptom is the Pre-Cycle test does not run when KOEO and when I command the injector test with my test box it fails.
I agree with you that is appears to be Electrical or Command related.
Thread Starter
|
New User
Joined: Jan 2018
Posts: 8
Likes: 0
Thx for your response, I tested the FICM relay and it passed. Also I have all three FICM voltages within Spec and they remain in Spec while cranking.
Trending Topics
Fleet Owner
Joined: Nov 2003
Posts: 27,900
Likes: 3,617
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Thread Starter
|
New User
Joined: Jan 2018
Posts: 8
Likes: 0
Thx, for your response the cranking rpm was over 230 rpm at -10 degrees air temperature with the Block Heater plugged in.
Also, the injectors don't cycle when the key is turned on and the injector cycle test fails. This symptom does not have anything to do with minimum cranking RPM.
I believe I've eliminated the wiring harness as the root cause and I'm going to swap out an injector to see if the results of the injector cycle test change.
Also, the injectors don't cycle when the key is turned on and the injector cycle test fails. This symptom does not have anything to do with minimum cranking RPM.
I believe I've eliminated the wiring harness as the root cause and I'm going to swap out an injector to see if the results of the injector cycle test change.
Fleet Owner
Joined: Nov 2003
Posts: 27,900
Likes: 3,617
An earlier posts stated 100 rpm minimum. I was simply correcting it. Your statement of rpm's well past 120 didn't exactly guarantee that you didn't have another issue w/ slow cranking speed, but over 200 does.
Fleet Mechanic
Joined: Feb 2007
Posts: 1,652
Likes: 79
From: Mooresville, NC
Thx, for your response the cranking rpm was over 230 rpm at -10 degrees air temperature with the Block Heater plugged in.
Also, the injectors don't cycle when the key is turned on and the injector cycle test fails. This symptom does not have anything to do with minimum cranking RPM.
I believe I've eliminated the wiring harness as the root cause and I'm going to swap out an injector to see if the results of the injector cycle test change.
Also, the injectors don't cycle when the key is turned on and the injector cycle test fails. This symptom does not have anything to do with minimum cranking RPM.
I believe I've eliminated the wiring harness as the root cause and I'm going to swap out an injector to see if the results of the injector cycle test change.
Whoa nelly ---She's cranking @ 230 rpm >>> ??? <<<
Geronimo ----Those cylinders can't be sealing if she's pushing that number......................
Fleet Owner
Joined: Nov 2003
Posts: 27,900
Likes: 3,617
Interesting video on 6.4L (or 6.7L) starters in a 6.0L
https://www.ford-trucks.com/forums/1...e-6-0-a-2.html
Being in Texas though, I can't relate to -10 degrees!! I agree that 230 rpm seems high at that temp for even a 6.4L starter.
https://www.ford-trucks.com/forums/1...e-6-0-a-2.html
Being in Texas though, I can't relate to -10 degrees!! I agree that 230 rpm seems high at that temp for even a 6.4L starter.
Thread Starter
|
New User
Joined: Jan 2018
Posts: 8
Likes: 0
Thx for your response I ruled the FICM out by swapping out the FICM with a good spare and also with one from a running 6.0. Neither would pass the injector cycle test.
I did run a compression test as well with all the glow plugs out and the compression ranged from 372 - 381 which is within spec. I wanted to confirm that its not a head gasket or valve train issue.
The weather is going to improve greatly this weekend and I'm going to swap an injector with a new one to see if it passes the injector cycle test.
I did run a compression test as well with all the glow plugs out and the compression ranged from 372 - 381 which is within spec. I wanted to confirm that its not a head gasket or valve train issue.
The weather is going to improve greatly this weekend and I'm going to swap an injector with a new one to see if it passes the injector cycle test.
Thread Starter
|
New User
Joined: Jan 2018
Posts: 8
Likes: 0
Thx for your response, It does fire on WD-40. I agree, what I thought originally was a wiring problem is a lack or no fuel being delivered to the cylinders via the injectors.
The non cranking fuel pressure is over 45 PSI but doesn't change when you are cranking the engine.
This and the failed injector cycle test leads me to believe that the injectors have failed.
The non cranking fuel pressure is over 45 PSI but doesn't change when you are cranking the engine.
This and the failed injector cycle test leads me to believe that the injectors have failed.