Injectors???

[JWMiller]

Hey guys, I've recently had a weird kind of flutter in my truck while under load and it only happens when the truck is not up to operating temp. Had some rough cold starts and added Rev-x on my last oil change that helped a little with the cold starts but didn't fix my problem. Changed FICM and now I'm tired of guessing what's causing this. Any suggestions? My truck has 201k on it and is studded, tuned by Eric at IDP, Zoodad, blue spring, and full EGR delete.

[dannyboy950]

You need it scanned on live data and a data log run by someone who knows the 6.0.
Guessing can get real exspensive real fast.

[dowmace]

Explain what you mean by flutter.

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[JWMiller]

Yes it can! Sure don't want to replace injectors if that's not the case.

[JWMiller]

When I excelerate it sounds like its not getting the fuel it needs. It doesn't shake the truck but you can def hear it in the exhaust tone.

[dowmace]

How does your fuel filter look? Do you have a full pressure gauge? If your ficm is giving 48 volts you either have a fuel pressure problem or bad injector(s) more than likely.

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[JWMiller]

Never checked out my fuel filter. Just changed it last week with my oil and oil filter as well. Don't have a fuel pressure gauge. My sct 3015 has data log capabilities but I'm not versed in all those numbers....

[gabelnj]

funny you mention this, mine is doing the exact same thing. just started two days ago. Once it gets to full operatin operating temp it clears up though... Still on stock FICM and due for filter change.

[JWMiller]

Last time it did this I cleared it up switching to 5w-40 synthetic and ended up buying a FICM half shell that I don't think I needed. It's just a hard symptom to diagnose on these trucks... If you find out anything please let me know.

[gabelnj]

I'm going to order a BPD FICM tonight when I get home from work. Spoke to a Gear head at the local shop and he advised me to DO IT. rather spend $600 on the FICM (Which will eventually fail) instead of new injectors. Ill let you know how it turns out after i get in and installed.