Last weekend figured out my FICM voltage was way low so I got a flashed FICM from swamp. I also loaded a Innovative tune from Eric. Got the FICM from FEDEX yesterday and installed this morning.

The new FICM solved the start up, rough idle and zero power issue. However, when i took it out for a test drive it is doing something new.

Under hard acceleration or WOT it starts to cut out from mid range RPMs and up. If it was a gas engine, i would call it a miss. Tried a different tune, no substantial change.

So, is it possible i damaged one or more injectors running it with a low voltage condition?

Is there something else i should be checking? This is starting to get expensive.

 

I could see it being a possibility. If you are having such a "high" performance issue, then I would imagine that there would be a code stored in there(injector codes usually don't set off a CEL, or atleast I haven't seen one yet). If you have a cylinder issue such as an injector not performing to par, then it should be logged in there. I would try that first.

As far as diagnostics goes, what do you have access to?

 

I can get access to a Snap On MODIS. That should show all codes right?

 

That should from what I've heard from people that have Snap On devices.

 

What do you call mid-range RPM's??? Mind is doing the same thing from about 2500/3000 up under no load, but not throwing a code.

 

tim if yours is minor...
check oil level
you may may have a bad standpipe
you may have an ipr issue.
or its just your truck does that..

 

I really need to get AE on my laptop. It sucks to not be able to see what's going on. Same thing with zhilton's truck. You can guess all day and never get it right without the right tools and I ain't no parts changer. I do need to check for an hpo leak

 

OTC ZTSE4576 ICP LEAK TEST PLUGS (NO. 10) for International

here the tool to test 03/04 style pump leaks.