the truck has a bad miss once it warms up at idle and is noiser than normal. how would I find the bad injector no codes have shown up.
help
and thanks

 

Sounds more like an ICP sensor or the Ipr valve.

 

Check your FICM voltage and if you're using the SG2 to scan your 04 for codes get something else.

 

ficm voltage is 48 steady and yes using the sg to pull codes i have a sct tuner will that work better

 

Maybe but I doubt it.

 

if you dont get a code either a dealer or an Auto Enginuty for a cylinder balance test

Might also try to give the injector harnesss a wiggle test might have a short

So at cold startup it runs smooth as silk?????

 

yep at cold start it funs smooth if you let it idle for about 5 to 10 minutes it will start to miss ramdomly but not real bad the longer you let it idle the worse it will miss. i started it last night and found that out. yesterday when i left to go to work it cranked normal i left and got about a mile down the road to a stop light and thats when it started acting up drove it home and thats where it sits.is there anything i can look at with the scan gauge to tell me if an injector is going south? i also looked at ICP and IPR the values looked normal for what they been running.

thanks again

 

Here's some codes for fuel injectors in X Gauge. I haven't used them myself, but might be worth a shot:

These are from James DeLong at Scangauge. (Well, thats a lot of gauges. )


Yea, MAP is a standard gauge - but this XGauge is actually better than the standard one. It has a larger range which was needed because the standard gauge tops out around 37 psi absolute (about 22 lbs of boost), which diesels have no problem doing. This one should read well beyond 22lbs of boost.

Manifold Absolute Pressure
TXD: 07E0221440
RXF: 046285140640
RXD: 3010
MTH: 012203200000
NAM: PSI

With a little tweaking you can adjust this to read boost as you said.

To do this, just plug in the MAP code - get a reading from it with the key in the on position but the engine off, then based on the reading changed the last 4 digits of the MTH to whatever corresponds to your reading on this table

14.0 -- FF74
14.1 -- FF73
14.2 -- FF72
14.3 -- FF71
14.4 -- FF70
14.5 -- FF6F
14.6 -- FF6E
14.7 -- FF6D
14.8 -- FF6C
14.9 -- FF6B
15.0 -- FF6A

So, for example if you got a reading of 14.5 PSI with key on engine off you'd change the MTH to 01220320FF6F and the reading should read 0.0 with key on engine off and would then show how many lbs of boost you were at when the vehicle is running.

Quote:
Originally Posted by DieselStroke
Go ahead and give me any codes that you may have for the injectors, i am always happy to try out new things. Please let me know if you have any other gauges for our trucks that may be potentially useful, we are happy to try anything you throw at us.

Thanks,
Patrick
Here's what I have for injectors

Injector Timing Before Top Dead Center (Degrees)
TXD: 07E02209CC
RXF: 0462850906CC
RXD: 3010
MTH: 000A00400000
NAM: ITM

Fuel Injector Pulse Width (microseconds)
TXD: 07E0221410
RXF: 046205140610
RXD: 3010
MTH: 000800010000
NAM: FPW

Fuel Injector #1 Commanded on (On/0ff)
TXD: 07E02209EF
RXF: 0462250906EF
RXD: 3001
MTH: 000100010000
NAM: FI1

Fuel Injector #2 Commanded on (On/0ff)
TXD: 07E02209EF
RXF: 0462250906EF
RXD: 3101
MTH: 000100010000
NAM: FI2

Fuel Injector #3 Commanded on (On/0ff)
TXD: 07E02209EF
RXF: 0462250906EF
RXD: 3201
MTH: 000100010000
NAM: FI3

Fuel Injector #4 Commanded on (On/0ff)
TXD: 07E02209EF
RXF: 0462250906EF
RXD: 3301
MTH: 000100010000
NAM: FI4

Fuel Injector #5 Commanded on (On/0ff)
TXD: 07E02209EF
RXF: 0462250906EF
RXD: 3401
MTH: 000100010000
NAM: FI5

Fuel Injector #6 Commanded on (On/0ff)
TXD: 07E02209EF
RXF: 0462250906EF
RXD: 3501
MTH: 000100010000
NAM: FI6

Fuel Injector #7 Commanded on (On/0ff)
TXD: 07E02209EF
RXF: 0462250906EF
RXD: 3601
MTH: 000100010000
NAM: FI7

Fuel Injector #8 Commanded on (On/0ff)
TXD: 07E02209EF
RXF: 0462250906EF
RXD: 3701
MTH: 000100010000
NAM: FI8

Quote:
Originally Posted by DieselStroke
He is working on an injector misfire count right now that should tell us if there is an injector that is performing worse than the average!
Here's what I have for misfire counts.

Cylinder #1 cumulative misfires
TXD: 07E022160E
RXF: 04620516060E
RXD: 3010
MTH: 000100010000
NAM: 1CM

Cylinder #2 cumulative misfires
TXD: 07E022160F
RXF: 04620516060F
RXD: 3010
MTH: 000100010000
NAM: 2CM

Cylinder #3 cumulative misfires
TXD: 07E0221610
RXF: 046205160610
RXD: 3010
MTH: 000100010000
NAM: 3CM

Cylinder #4 cumulative misfires
TXD: 07E0221611
RXF: 046205160611
RXD: 3010
MTH: 000100010000
NAM: 4CM

Cylinder #5 cumulative misfires
TXD: 07E0221612
RXF: 046205160612
RXD: 3010
MTH: 000100010000
NAM: 5CM

Cylinder #6 cumulative misfires
TXD: 07E0221613
RXF: 046205160613
RXD: 3010
MTH: 000100010000
NAM: 6CM

Cylinder #7 cumulative misfires
TXD: 07E0221614
RXF: 046205160614
RXD: 3010
MTH: 000100010000
NAM: 7CM

Cylinder #8 cumulative misfires
TXD: 07E0221615
RXF: 046205160615
RXD: 3010
MTH: 000100010000
NAM: 8CM

If you get good info on the misfire count codes let us know. Would be a good tool to have. Good luck!

 

I never had any luck with most of the injector xgauges. I'm starting to think it's exhaust leaking into the fuel rail but there are too many other things it could be as well.

 

how would i figure where exaust would be leaking in at. will a shop computer pick that up or any thing i can do to find out

 

You need to do a ballon test to narrow it down to which head

then after you figure what head it is let it warm up till its missing again the unplug each injector 1 at a time when you unplug the bad one there will be NO Change in how it runs when you unplug the good ones it will sound and run Worse and miss harder

a cylinder balance test may get it too IDK

 

looked at truck tonight
cranked and let it warm up the miss was inter-minting but after i wiggled all the wires and pulled the injectors it quit missing pulled all the injector plugs and could not tell which injector was giving the trouble
going to wait till friday and see what i can figure out

 

Almost sounds like a bad injector harness


wire harness chaff locations



<TABLE style="WIDTH: 568pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=757><COLGROUP><COL style="WIDTH: 568pt; mso-width-source: userset; mso-width-alt: 27684" width=757><TBODY><TR style="HEIGHT: 76.5pt" height=102><TD style="BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent; WIDTH: 568pt; HEIGHT: 76.5pt; BORDER-TOP: #f0f0f0; BORDER-RIGHT: #f0f0f0" class=xl65 height=102 width=757>Wiring Harness Chafing:
Some trucks with the 6.0 may exhibit a crank/no start, rough running, misfire, buck/jerk or lack of power. This may be due to the FICM harness chafing on a valve cover stud near the FICM. Other potential locations for chafing are where the harness routes past the EBP sensor, the belt idler on the driver side of the engine, the glow plug control module bracket on the passenger side of the engine, and the accelerator pedal sensor wires at the steering column (adjustable pedals only). Reroute and repair the harness as necessary. Broadcast Message 0918/1374, SSM #17522.</TD></TR></TBODY></TABLE>

 

thanks I'll take a close look at all those locations