Crank NO Start 2002 2500HD LB7

[dgalvin66]

You need fuel pressure, crank and cam signals in sync and no security VATs issue for the system to start. Also, a working FICM

Once started, then get balance rates

PS: torque app isn't really a good option for diagnostics on these vehicles

I bought a Launch X431 CRP919E Elite last night and it was just delivered. I am charging it right now and going to read the manual. Hopefully it will help shed some light on the problem.
So I want to check the crank and cam signals.
I wish the FICM had a way to test it.

 

[2004LB7]

You should have codes if the FICM is bad

 

[dgalvin66]

You should have codes if the FICM is bad

The only codes are the ones I posted before; they have been cleared and no new codes since.

 

[dgalvin66]

The scanner I had purchased turned out to not have very much support for my truck, I could not even check the fuel rail pressure with it. So, I returned it.
I have inspected the wires as best as I am able and found zero damage. I tried to get it to start by spraying some WD40 and nothing.
I am leaning towards the FICM and cannot find any way to test it myself so I would like to send it into a shop but do not know which ones are any good. Please tell me your recommendations.

 

[2004LB7]

Re-circuit has good reviews

But if the FICM was bad, you should have at least one code related to it

 

[dgalvin66]

Re-circuit has good reviews

But if the FICM was bad, you should have at least one code related to it

The only real code I had was the U1000 which has been cleared, and no new codes have appeared since.
I will look up their site and get some info from them.
Thanks

 

[Ron Nielson]

Some info attached

 

[dgalvin66]

Here is some info I have scanned from the truck:
Desired Fuel rail pressure - 6000 psi
Actual Fuel Rail Pressure - between 5800 & 6100 psi
Injector pulse rate averages around 2.4
I have bled the air from the filter head and the push button is staying firm.
I have not gotten the fuel hoses removed yet to run a clear hose.
If I am understanding what I am seeing so far I am getting fuel pressure so the CP3 and FPR seem good, and the injectors are pulsing so I am thinking the problem may be the FICM.

I need to know what shop you guys reccomend for trying to rebuil the ficm. I have reached out to Re-circuit but have not heard back from them yet. Does anyone know anything about SIA?

 

[2004LB7]

I sent two out to SIA and both were returned with them stating they didn't know what was wrong

Re-circuit took about two weeks for them to respond to my questions.

This is some of the text they sent

"Usually my repair is $516. Burns start at $750. Just depends on whats going on with them 100%"

"I do fix a lot of units non repairable by SIA though"

It does look like you have the right fuel pressure. So, that shouldn't be a problem. Injector pulse rate at 2.4??? That doesn't sound right. What is the measurement being used? mm3?

 

[dgalvin66]

I honestly do not know what the measurement used is. I will go out when I have a chance and look at it again.

 

[dgalvin66]

I spoke to Re-circuit and they told me that they do not test them and figure that the customer has already done the testing to determine the ficm is bad. How do they know what to fix? And I am still waiting to hear from them on what the cost is.

 

[dgalvin66]

I sent two out to SIA and both were returned with them stating they didn't know what was wrong

Re-circuit took about two weeks for them to respond to my questions.

This is some of the text they sent

"Usually my repair is $516. Burns start at $750. Just depends on whats going on with them 100%"

"I do fix a lot of units non repairable by SIA though"

It does look like you have the right fuel pressure. So, that shouldn't be a problem. Injector pulse rate at 2.4??? That doesn't sound right. What is the measurement being used? mm3?

The injector pulse rate is averaging 2.3 MS

 

[2004LB7]

The injector pulse rate is averaging 2.3 MS

If that is milliseconds then thats seems wrong. That would make it 2,300 uS. Or many times more then needed to get the engine started. I haven't looked at those tables in a while but I thought it was closer to 40 uS. In otherwords, less then 50 times less. If this is correct, then I'd expect lots of smoke from the exhaust when cranking

If it's actually uS or microseconds, then 2.3 is way too little fuel unless you're running some vary large injectors

 

[Chevy1925]

Throwing parts at it aint gunna fix it. Send that ficm out and take a wild guess, when it aint that, you’re just going to have a lighter wallet.

You need to see if the scanner is seeing rpm as you crank and what rpm. Then look for the cam/crank sync as stated before.

Also, when and how did this whole “no start” happen. As in, what have you messed with prior to the issue and back history prior to the issue

 

[dgalvin66]

Throwing parts at it aint gunna fix it. Send that ficm out and take a wild guess, when it aint that, you’re just going to have a lighter wallet.

You need to see if the scanner is seeing rpm as you crank and what rpm. Then look for the cam/crank sync as stated before.

Also, when and how did this whole “no start” happen. As in, what have you messed with prior to the issue and back history prior to the issue

Had to take a bit of time from the truck for health reasons.
To answer your question, I had done nothing to the truck other than drive it, I did replace the water pump about 6 months prior.
Here is what I have tried as time and health have allowed:
1) I disconnected the Input fuel line to the filter head and connected a long fuel line with a fuel pump and ran that into a 5 gallon gas can with fuel in it to see if it could be a problem with some of the fuel lines sucking air, that did not help any, so I put it all back to stock.
2) Today I disconnected the power to the Glow Plugs and sprayed starting fluid into the air intake and got it to fire up, just long enough to use what I sprayed and quickly died. I did not want to do that too many times, so I am done for the day.

I did replace the filter head housing when this problem first started hoping that was the cause, I guess it could have been a bad replacement part, so I am thinking to replace it again after reading so many posts about the Doorman parts being bad right out of the box.

What are some thoughts and ideas on what to try next?
Thanks

 

[Fryerdiesel]

I'm wondering if you ever figured this out. I also have a 2002 but it has a FASS pump and won't start. It is absolutely driving me crazy!

 

[dgalvin66]

I'm wondering if you ever figured this out. I also have a 2002 but it has a FASS pump and won't start. It is absolutely driving me crazy!

No I have not gotten it running yet. My health (cancer) is emptying my wallet too fast. I want to try doing the FICM but need to come up with the money for a known working or rebuilt one next.