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Got an 07 159k 6.0 with a no start.
.have a. 0403 code and all the injector glow plug codes for every cylinder.
anyway im wondering about tach not moving and also i replaced banjo bolts.
should i expect a bunch of cranking to get the air out of the system?
I installed a fuel pressure gauge straight off fuel bowl port and am getting 60 psi.
Thankx for the help.
When you say the Tach isn't moving, do you mean specifically the dash gauge? Can you get an rpm on a scan tool or tuner?
What Scan tool do you have?
You really need one that reads codes THOROUGHLY (ie not just a tuner). ForScan or ForScan Lite on a smartphone is highly recommended.
That said, no rpm typically means a bad crank sensor (CKP) or its wiring.
Yeah i forgot i do have lite on my phone.
so the actual dash cluster wasnt showing rpms while cranking.
just thought that was strange.
this is an egr deleted truck
Sure wish the OP would answer the question about the rpm reading from a scan tool ....................
Also would like to know the IPR % duty cycle and the injector pulse width when cranking .....................
Insufficient data means guessing and that means $$$$$ .....................
The crank sensor is the source of the rpm reading.
No cam/crank sync with a good rpm reading is usually the cam sensor. No FICM Sync with a known good FICM, and rpm readings, is often times a cam sensor.
check out the statement under the heading "diagnosing Sync" - page 11:
Diagnosing SYNC:
• Using the WDS, select the SYNC PID. This PID will be viewed as a YES or NO on the top of the data screen. KOER, SYNC should always read YES.
• SYNC is totally derived from the CKP sensor. It is possible to have no CMP sensor signal and still have SYNC (YES) and an RPM signal.
• NO SYNC and no RPM signal, typically is a faulty CKP sensor/circuit problem.
Just to throw this in for extra information:
Diagnosing FICM SYNC: Note: Always diagnose any SYNC issues before diagnosing FICM SYNC issues.
• Using the WDS, select the FICM SYNC PID. This PID will be viewed as a YES or NO on the top of the data screen. KOER, FIDM SYNC should always read YES.
• If there is no FICM SYNC while cranking the engine, then the problem is limited to the circuit illustrated below. The FICM SYNC circuit relays information from the PCM to the FICM.
• Engine Wiring Harness: FICM SYNC occurs through two circuits between the FICM and PCM. Verify engine wiring harness circuits CMPO and CKPO. If one of these two circuits has a short/open, FICM SYNC will not occur.
• PCM: If the PCM is not working properly, FICM SYNC may not occur.
• FICM: If the FICM is not working properly, FICM SYNC may not occur.
• CMP If the CMP signal is corrupt (electrical or mechanical), FICM SYNC may not occur.
I know this is older but I am at a loss. Truck was running rough, put a new icp and harness in it, replaced with good ipr also, 1400psi at around 42% ipr during crank. Has sync and sct is picking up rpm but nothing on dash. Engine cranks well, fuel in the furl bowl but injectors do not fire. Ficm at 48 volts. Please help.
Where did you buy the ICP and IPR? How do you know it is a good IPR?
Could be that the FICM connectors didn't get plugged back in all the way (this is where you absolutely need a good code reader). Also, 48 volts doesn't mean the FICM is commanding the injectors.
Scangauge and SCT are not good code readers. You need a better troubleshooting tool ForScan or ForScan Lite is recommended if you are serious about troubleshooting the 6.0L.
That said, we need you to post some additional cranking values:
FICM sync
FICM LPower
Injector Pulse Width
ICP sensor volts
Might as well post the V-reference volts after checking the 4 parameters above.
The scangauge will display all of them.We can post the equations for the programming if you need them.
01-28-2022, 05:16 PM
