Help me diagnose this vibration

**Korx** · #1 (**permalink**) 12-05-2012, 05:00 AM

2004 6.0 f250 stock with exception of tuning and 5" exhaust.

I have a vibration in the floor on both the driver and passenger side. Vibration only happens at around 1500-1750 rpm in every gear. 1, 2,
3, 4, 5, 5L. Even does it in neutral and park when I rev it up, but it is not as bad as when I am in drive.

I'm really stumped what this is, anyone have any ideas?

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**Korx** · #2 (**permalink**) 12-05-2012, 05:33 PM

Anyone?

**southend** · #3 (**permalink**) 12-05-2012, 06:25 PM

Exhaust rubbing the cab or frame?

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**Korx** · #4 (**permalink**) 12-05-2012, 06:28 PM

I can't find a spot where it is rubbing. I had checked that before and it was rubbing the shackle bolt, but have since then fixed it.

**southend** · #5 (**permalink**) 12-05-2012, 06:34 PM

If you wouldn't have said floorboard vibration, i'd have said bad injector.

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**Korx** · #6 (**permalink**) 12-05-2012, 06:37 PM

I heard spool valves can make it vibrate about this range of RPMs so not sure if its my injectors or what type of vibrations injectors will make.

I also heard something about it maybe being exhaust/turbo drone. Wondering if anyone has experience with this.

**southend** · #7 (**permalink**) 12-05-2012, 06:54 PM

I had an injector take a hike, idled like crap, and shuddered/vibration at 60-65mph, but would clear up when getting on the throttle. There is a tsb for tutbo droan, may have only been 03', iirc. Check your tutbo mounting bolts.

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**Korx** · #8 (**permalink**) 12-06-2012, 09:33 AM

This is the TSB:
http://www.thedieselstop.com/faq/949...les/041804.pdf

Anyone have any experience with this TSB? It would kinda suck to buy $60 pedastal just to find out that's not the problem.

dannyboy950 · #9 (**permalink**) 12-06-2012, 10:27 AM

You may want to check your motor mounts and transmission mount for busted rubbers.

rabpearson · #10 (**permalink**) 12-15-2012, 09:42 PM

I had a similar issue after replacing the hpop. I found the number two cylinder harness for injector was not snapped all the way on. Causing a dead cylinder at times, which then was causing a vibration in about the same rpm area you are describing. It would go away under wot.

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