7.3 Engine suddenly quit
Thread Starter
|
New User
Joined: Dec 2015
Posts: 16
Likes: 0
From: Mena, Arkansas
7.3 Engine suddenly quit
I have a 1996 E350. I started it the other morning to warm up. The Aux idle Control was fast-idling the engine. After a few minutes, it slowed to low idle and a second or so later, the engine quit and would not restart. The AIC now displays "CERR". I've researched this and Ford says that there is a communication problem with the AIC module. I tried swapping out the AIC box with one from another truck and it didn't change anything: still no start up.
I even tried disconnecting the batteries for an hour to reset everything. No help.
I don't want to tear into the ECM & other modules haphazardly in hopes of accidentally fixing something.
Can somebody point me in the right direction to start troubleshooting?
Thanks
Terry
I even tried disconnecting the batteries for an hour to reset everything. No help.
I don't want to tear into the ECM & other modules haphazardly in hopes of accidentally fixing something.
Can somebody point me in the right direction to start troubleshooting?
Thanks
Terry
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
I've never had an AIC, so no experience there. Can you de-power the unit? Either pull a fuse or relay or unplug something to see if anything changes?
Do you have any way to check codes or read live data while cranking? From your description, it doesn't sound like it suddenly quit, but more like it slowly died.
To be sure, have you checked engine oil level, fuel level, air and oil and fuel filters are good and not past due for a change?
Do you have any way to check codes or read live data while cranking? From your description, it doesn't sound like it suddenly quit, but more like it slowly died.
To be sure, have you checked engine oil level, fuel level, air and oil and fuel filters are good and not past due for a change?
Thread Starter
|
New User
Joined: Dec 2015
Posts: 16
Likes: 0
From: Mena, Arkansas
Thanks for the reply. I did check oil level, etc and it all looks good. Swapping AIC units essentially powered it down, as did disconnecting the batteries for an hour.
I'm still trying to research it, but I think it's either FICM or ECM. I'm not sure if this truck is OBD2 or not. Hopefully it is.
Any input on my problem will be greatly appreciated!
Thanks in advance
Terry
I'm still trying to research it, but I think it's either FICM or ECM. I'm not sure if this truck is OBD2 or not. Hopefully it is.
Any input on my problem will be greatly appreciated!
Thanks in advance
Terry
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
A 96 van doesn't have an FICM. It has an IDM. The truck will have an obdII connector, but the engine is not fully obdII compliant, which means most generic code readers will not pull all the engine codes.
The CEL (check engine light) should be illuminated if you had an IDM problem, but as with most things electrical, if they fail, it's typically like someone shut the key off. Not like a power down, spit and sputter.
The CEL (check engine light) should be illuminated if you had an IDM problem, but as with most things electrical, if they fail, it's typically like someone shut the key off. Not like a power down, spit and sputter.
Thread Starter
|
New User
Joined: Dec 2015
Posts: 16
Likes: 0
From: Mena, Arkansas
I had a friend hook up his scanner to the truck today. It would not pull up the VIN or any other information. After timing out, it would give a communication error.
Is the communication error due to the vehicle not being fully OBD2 compliant, or because of a defective computer. If it is a computer problem, would it be the IDM or main ECU? I'm leaning towards the ECU based on the fact that neither the AIC or the scanner can communicate.
Thoughts anybody?
Thanks
Terry
Is the communication error due to the vehicle not being fully OBD2 compliant, or because of a defective computer. If it is a computer problem, would it be the IDM or main ECU? I'm leaning towards the ECU based on the fact that neither the AIC or the scanner can communicate.
Thoughts anybody?
Thanks
Terry
Thread
Thread Starter
Forum
Replies
Last Post
shellyh1971
1987 - 1996 F150 & Larger F-Series Trucks
3
Sep 20, 2011 09:20 AM
accobra1963
1994.5 - 1997 7.3L Power Stroke Diesel
5
Oct 6, 2008 10:10 PM
