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post #1 of 24 Old 12-01-2007, 11:05 AM Thread Starter
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Help! Rough Engine

My truck runs horribly rough between 1200 - 1500 rps. The whole truck shakes. I replaced the fuel filter thinking that may be it, (the old one was nasty), but problem still occurs. Any ideas what to check.

Last edited by leatherlung; 12-01-2007 at 11:22 AM. Reason: refresh
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post #2 of 24 Old 12-01-2007, 12:14 PM Thread Starter
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Had to write something here to keep post alive till I get an answer.
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post #3 of 24 Old 12-01-2007, 12:53 PM
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Are you getting a ses light on the dash? Do you have a scanner to see if you have any codes?

2002 F-250 4x4 EC, SRW, SB
Auto 93,000 miles
DP Tuner F5
ATS Compressor and 1.0 Exhaust housing high flow back plate
Turbo Back 4" Silverline Exhaust Mbrp Muffler Delete
Isspro Trans,Pyro,Boost Triple Pod
Fumoto Oil Drain Valve
AIH Delete With Boost Fitting

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post #4 of 24 Old 12-01-2007, 12:56 PM
Let's go B's!!!!

 
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Is it definitly the motor? Or is it a vibration somewhere else at certain rpm's and speeds?

just a thought, give us some more symptoms, and we could help more.

Good Luck

Chris

2002 Crew Cab Long Bed
4" BDS, 35x13.50 Cooper STT on 20x10 Black Rockstars, and other stuff.....310,000 miles and counting...
<><
2 Thessalonians 3 v.6-15

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post #5 of 24 Old 12-01-2007, 01:01 PM
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I'd look into checking out the U-joints..they can cause some serious vibration as they wear out. Another place to look is your allignment/balance.

~Shayna

2008 6.4L 4X4 Lariat

6.4L w/SCT Livewire, Deleted, and loved! About to hit 200,000 miles!

RIP 2003 7.3L Limited Excursion 4X4 & 2007 6.0L Lariat FX4
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post #6 of 24 Old 12-01-2007, 01:22 PM Thread Starter
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No its the engine. Always at RPMs mentioned above. I have a diablo tuner. Have it tuned at +100hp. I haven't noticed any lights coming on. I think the tuner has a scanner. I will check that out.
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post #7 of 24 Old 12-01-2007, 01:23 PM Thread Starter
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It feels like a gas burner when the plugs are misfiring badly.
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post #8 of 24 Old 12-01-2007, 01:24 PM
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Yeah read your codes write them down and then clear them and then drive it again and check them again tomorrow and see if the same or any come up. If no codes are present it could be a fuel pressure issue. Its only at those rpm's?

2002 F-250 4x4 EC, SRW, SB
Auto 93,000 miles
DP Tuner F5
ATS Compressor and 1.0 Exhaust housing high flow back plate
Turbo Back 4" Silverline Exhaust Mbrp Muffler Delete
Isspro Trans,Pyro,Boost Triple Pod
Fumoto Oil Drain Valve
AIH Delete With Boost Fitting

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post #9 of 24 Old 12-01-2007, 01:38 PM Thread Starter
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yes, only at those rpms. Can you leave that fuel pressure guage installed permanantly? I saw it on the BB fuel boost mod.
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post #10 of 24 Old 12-01-2007, 02:20 PM
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did you find any codes???

-Josh

2008 2500 LMM- Deleted, Blocked, Fueled, & Tuned by:
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