Hey y’all. New question for smart people. I have 6.0. 2004 started sat idling for about 2 minutes. It shut off. Has not started since. I have not purchased scan tool yet but when I crank it it sounds like it wants to fire. Almost starts but doesn’t. I unplugged the icp and it will start right up with no problem but in about a second or maybe 2 it shuts down again. I believe I have read about others running after unplugging icp. Any ideas? Should it continue to run after start with icp unplugged?

 

Check the oil level.

What are ambient temps where your at? Have you tried plugging the block heater in for a few hours?

It should at least idle with the ICP unplugged if that is the issue.

When you get Forscan post some #s. ICP, IPRv, Ficm voltage, sync, cranking RPM etc...

While your waiting put a battery charger on it and confirm you have good battery connections everywhere.
A voltage drop test across all battery connections would be a good idea as well.

 

You new a scanner that is capable of reading the live date. I've seen people waste enough money guessing that they could have bought the scanner. I always tell them guessing is expensive... how much can you afford.

 

According to his other thread he is working on getting Forscan or Forscan Lite

 

Yes, it should operate normally under a calcualted ICP. I drove mine several weeks with it unplugged with no issues waiting to get a new sensor.

You have a different issue, but ForScan will help get it sorted.

 

Thanks. Ambient temp around 50. F oil is full. I have now replaced fuel filters with oem. Battery fully charged. FORScan is downloaded. Waiting on obd ex. I’ll get back when I have some data.

 

Sounds like you either got lucky by getting it to start after unplugging the ICP, or you might have a couple issues going on here. We will definitely need live data to help you out.

-jokester

 

Thanks. I’m waiting on usps to deliver obd ex. As soon as I get it I’ll be back asking questions about how to operate it and get proper data needed.

 

Not sure if there's any here, but there are some really good forscan writeups in the 99-03 7.3 forum.

 

Thanks a lot I’ll be sure to look over there. While I’m waiting on FORScan. In the mean time I’ve had block heater plugged in rather nice day also. Batteries fully charged so I figured I’d give it a crank. Still no start but it still tries. In my warped gasoline engine head I’m leaning on electrical just because I can smell fuel after cranking and if I unplug Icp it starts immediately. Although it shuts right off but starts. Sorry just a lot going on in my head while I wait on obd ex for FORScan.

 

Hey guys. I got forscan working today. Learning how to work it but it is a little tough for this illiterate old fella. I’m gonna try to put up a video. Any help in how to do that will be appreciated. Thanks in advance.

 

I’m not sure if this worked or not. There should be a video attached somewhere

 

I've never heard a truck do that clicking; hopefully, that's not you with the key. Those batteries don't have enough reserve; getting down under 10.0V can damage your FICM, possibly even below 10.2V.

 

So first I will apologize for not knowing how to work this forum. Anyhow here we go. I believe I loaded pic of forscan dtc’s but couldn’t get video up of live cranking data.

1. ficm~Lpwr,v11.50
2. Ficm~vpwr,v 11.50
3. Ficm~mpwr,v 47.00
4. Icp,v 0.26
5. Icp,psi 7.9

While cranking
1. = 10.50
2. = 10.50
3. = 46.50
4. = 1.30
5. = 1036.8
6. Icp-des,psi =926.9
7. Ipr%= 36.72
8. Rpm 214 1 min.
ficm sync and cam crank sync fluctuate back and forth while cranking between yes and no.

 

Yup. Low batteries or bad connection. The clicking is the voltage dropping enough for the starter relay to drop out, then the voltage recovers and re-engages the relay. In other applications I call it ratcheting.
My diesels will do that on a low battery or single good battery. A bad connection or cable can do it also.

I'm going to again suggest checking all connections and doing a voltage drop test.
I'd also pull, recharge, and load test the batteries.