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Old 02-22-2011, 03:43 PM
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Exclamation electrical problems NEED HELP

this is gonna be a lengthy one but here it is... for about the last 2 weeks (progressively getting worse) i have noticed that upon start up wether it be warm out or cold (engine itself has to be cooled down) the check engine light comes on and stays on for about 3-5 minutes and truck idles low like theres a load on the motor, very sluggish acceleration if driving with it on as well... once the check engine light kicks off the rpms jump to 1500-1600 and idles down but does so very erratically... after about 5-10 minutes the symptom stops completely and truck does fine... basically stock has sct livewire, straight pipe, diode mod... any ideas this is my daily driver and i would really hate for it to be somthing big... thanks in advance.
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Old 02-22-2011, 03:48 PM
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So, what's keeping you from getting it scanned for codes and finding out what the problem is?
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Old 02-22-2011, 06:58 PM
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also noticing that my egts have been runnning consistantly high since this has started as well as truck being sluggish... the codes im throwing from my sct livewire are... p1280 and p1211
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Old 02-23-2011, 07:28 AM
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Maybe this helps?

P1211{1}{3}-ICP Pressure Uncontrollable, Pressure Above/Below Desired

from the "Dieslemans Site under Tech Info"

Loss of power, usually after a hard acceleration; Rough idle; Check engine light comes on, DTC P1211:
Intermittent high pressure oil leakage.
This condition usually occurs when the vehicle is cold and the oil is thick. When performing a hard acceleration, the truck suddenly looses power, the check engine light comes on, and once returning to idle the engine runs rough and won't accelerate. Cycling the key may correct the concern, clearing the code from the PCM will correct it temporarily. If you can monitor data stream, at idle the ICP pressure normally is 400-700 PSI and the IPR duty cycle is 9-14%; at cruise, ICP is 700-1200 pSI and IPR is 15-20%; under normal acceleration, ICP is 1200-2000 PSI and IPR is 20-30%; and under WOT accel, the ICP is up to 3600 PSI and the IPR is 35% or higher. When the above symptom occurs, typically the idle ICP reading will be normal, but the IPR duty cycle will be high--over 20% and up to the max 50%. A "blow-by" condition has occurred somewhere in the HP oil circuit. If you can get the problem to re-occur with some frequency, the most probable cause is worn or deteriorated injector or IPR o-rings. If the problem is intermittent, it could be a sticking IPR valve. Replace the injector o-rings with the latest-level kits--F8TZ-9229-AA. When replacing the IPR, make sure you get the correct part for the build date/serial number of your engine.
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Old 02-23-2011, 03:06 PM
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so what would be something to check/replace first orwould it be better to just bring it to a shop and have them throw it on their computer??
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Old 02-23-2011, 03:34 PM
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If you don't have a tool like the AutoEngunity to monitor everything then, either it's a good time to invest or yes, take it to someone who does.....

Here's some more info.

P1211 - "ICP Higher/Lower Than Desired" (7.3L)

We all know that this code is commonly caused by "Hot Chips" that are demanding more
Injection Control Pressure (ICP) than the High Pressure Oil Pump can deliver. For what it's
worth, these are the exact parameters that trigger this code:
ICP 410psi Higher Than Desired for 7 Seconds
ICP 280psi Lower Than Desired for 7 Seconds
This code can also be caused by legitimate High Pressure Oil System issues. Below is a list
of some of the causes:

Failed or Sticking IPR (Injection Pressure Regulator)
Failed or Weak HPOP (High Pressure Oil Pump)
Any Leak in High Pressure Oil System (o-ring, stuck injector, etc.)
Low Fuel Pressure (Rare)
P1280 / P1281 / P1283 - (7.3L)

The above codes are related to ICP also. If the Service Engine Soon (SES) light is on and
these codes are present, the ICP reading through any scantool will not be accurate as the
PCM is using a "default" ICP value. These codes are all "electrical" in nature. Common
causes are shorts between the Red and White IPR wires or between the Red IPR wire and
ground. These can also sometimes indicate a PCM problem
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