More ?'s

[907DAVE]

Originally Posted by cleatus12r

By the way, have you adjusted any parameters that I listed above?

No.. have not yet. I put the scanner on the other day and all I had left was 2 codes for the AIH. Finally got rid of the #8 cct code( damn cps). So those two are next on the list.

What is PW at idle for stock single shot trucks?

Had one in the shop the other day and put the scanner on it to take a peek and it showed around 1.1-1.3 and 650 ICP at idle. Mine shows way more.

[cleatus12r]

Here's a stock TDE1 (97 truck). So we're talking stock nozzles, 90cc AA code injectors.



Keep in mind that 4 MPa is 580 PSI, 4.5 MPa is 650 PSI, and 5 MPa is 725 PSI.

[907DAVE]

Think I found the parameters for the Intake Air Heater,





my first guess is to set them all to "0".


What do you think?

[cleatus12r]

I don't think your "set them all to "0". " idea will work out too well.
You have to "think" like the PCM.

Since you don't have an AIH relay anymore, the PCM sees that there is no input when it is actually commanded on (proof that the AIH relay circuit is working). You need to either set the on-time to "0" (which for now I will assume is "MAIH_ON_MAX") so the PCM doesn't turn on the AIH thus it can't run the monitor diagnostic OR you need to change the diagnostic parameter to reflect that there won't be an input voltage to the PCM when it is commanded on but I haven't seen anything in the top section of the parameters list to reflect AIH monitor input values.

Good luck.

[907DAVE]

One more......

Besides the LBF map, what affect does boost have on fueling?

[907DAVE]

Yet another for you..........




What the heck does the Indicated Torque map do?

More shifting stuff?




How about the Exhaust Backpressure Torque Loss map?

Same thing?

[cleatus12r]

Originally Posted by 907dave

Yet another for you..........




What the heck does the Indicated Torque map do?

More shifting stuff?

I think that the Indicated Torque has to do with the data on the scan tool. I think it is calculated using the torque table and the torque loss maps.




How about the Exhaust Backpressure Torque Loss map? I am not completely sure, but I think that calculations are made from this map to give scan tool data and it MAY also have an effect on the torque table map to further enhance the PCM's shift pressures.

Same thing?

Quote me on NOTHING!!

[907DAVE]

What causes the truck to jerk at very light throttle or when easing off the pedal, especially with the TC locked?.......MFD?



Can SOI affect how touchy the pedal is?

[Power Hungry]

Indicated Torque Map and Exhaust Backpressure Torque Loss are used to estimate how much NET torque the engine is generating. This value is then used by the transmission portion of the strategy to generate the base line and shifting pressures. The Pressure Slope is basically how many PSI per Ft./Lb. of torque to set the line pressure at. The the Pressure Offset is then added to this value.

For example:

Your Pressure Slope is 0.1811
Your Pressure Offset is -6
The Calculated Torque Output is 420 Ft./Lbs.

420 Ft./Lbs. x 0.1811 PSI = 76 PSI
76 PSI + (-6) PSI = 70 PSI
The PCM will set the line pressure to 70 PSI.

This also goes for the shift slopes and offsets.

Jerking at light throttle can often be caused by MFD or ICP. MFD is more appropriate for adjustment since it directly relates to throttle position.

Hope this helps.

[hayjayhorses]

I am pretty sure my '99 F450 and '00 F550 do the same thing I always just thought it was some kind of load surge on the engine like A/C cycling on and off or somthing like that.