02 7.3l runs and sounds like S_-_

[stevlin]

hey guys New to the site and need some input.

A little back ground on my truck. 2002 F350 xlt , 4x4 crew cab dually, diesel of course. The truck currently has 123000 KM's or 76000 miles. I pull a 5th wheel trailer three to four months of the year total weight combined less than 20000 lbs as well as a 16 foot enclosed trailer with a few contractor tools in it.

Mods- 4" turbo back dual exhaust ( bully Dog ), Hypertec programmer ( havn't used since last year see below) K&n ram air filter ( have two and swap every month)

Owned since new, all recalls have been done including camshaft position sensor.

Last year I had a cracked injector cup, How it was found I had Diesel in the antifreeze, coming out of the overflow. Three months after the engine warrenty had expired. Needless to say no help from Ford, that was at 100000km's ( the 5 years expired on the warrenty) At a cost of $3500.00 out of pocket

Since than I have experienced a noticable miss in the engine.

Here is what the mechanic has done. in the last three visits at a cost of $ 1600.00 +

Compression test - Fine
Boost- Fine
Remove and test all injectors - Within spec and fine.
Fuel delivery- Fine
Wiring- Fine


No codes, no check engine light nothing

Truck still has the same miss,and seems to be variable with rpm's, very noticable at 1100 to 1200, and runs rougher ( shaking), and slightly harder to start.

Since all these tests have been done there doesn't seem to be much left

Any Ideas and has any one heard of or had camshaft problems? Valve train

Please help

Steve

[bigcountrysg]

Is your miss when the engine is cold or hot or all the time.

[stevlin]

All the time, at idle more defined at thet rpm, and lack of power

Sorry I forgot to put in as well I am having a hard time pulling my 5th wheel mor than 50 mph I used to be able to pull at 65 to 70 with no problem. Let alone I even know when I have the 16foo behind me.

[bigcountrysg]

Originally Posted by stevlin

All the time, at idle more defined at thet rpm, and lack of power

Sorry I forgot to put in as well I am having a hard time pulling my 5th wheel mor than 50 mph I used to be able to pull at 65 to 70 with no problem. Let alone I even know when I have the 16foo behind me.

Hmmm maybe a high pressure oil problem. Or maybe a IDM problem.

[stevlin]

Would that show up on the dash cluster, all the gagues are within the normal position,

This has really got me stumped, Our best mechanic in the city can't figure it out.

To me it sounds like a camshaft, but no one has ever had a problem ?

[97 golden stroker]

you need to take it back to the dealer and talk to the sevice manager and tell him or her that you brang the truck in for this problem before and they didnt fix it. make sure that he or she feels the miss. and tell him that you have already spent alot of money at the dealer and you realy like the place but you need you truck fix. im a tech and times are slow now. that be said they will not just let you take you truck any were els. but DO NOT PAY!!
tell the service manager that you will pay for the fix but not to find the problem.

[bigcountrysg]

[QUOTE=stevlin;643572]Would that show up on the dash cluster, all the gagues are within the normal position,

This has really got me stumped, Our best mechanic in the city can't figure it out.

To me it sounds like a camshaft, but no one has ever had a problem ?[/QU

If you are referring to the oil pressure gauge. No that will not show any problem. Unless you are loosing engine oil pressure. The actual high pressure oil pump and system is what fires the injectors. It does use engine oil. But the hpop is its own pump.

You would need to have the pressure checked.

[stevlin]

I don't want to sound stupid here , The service manager claims the the "COMPUTER" would know if there was a problem with the sensors. If so then where are my codes?

My reply to him was that the computer will mask small imperfections in its own program and try to compensate for correction. Would this be correct.

[bigcountrysg]

Originally Posted by stevlin

I don't want to sound stupid here , The service manager claims the the "COMPUTER" would know if there was a problem with the sensors. If so then where are my codes?

My reply to him was that the computer will mask small imperfections in its own program and try to compensate for correction. Would this be correct.

This I don't know. I am not a tech, but I am sure a tech will be along to help you out.

[stevlin]

Thanks I appreciate your help, This gives me more ammo.