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the way you described it sounds like what mine was doing when it had 3 bad injectors.. at idle it felt like it had a large lope cam.. would try to light accel and felt like it missed on every cyl.. same with steady cruse.. nail the throttle would sputter then take off.. might want to find someone with a scanner that can do the power balance then watch how its running..
aand like randy said the scan gauge pretty much sucks for code reading.. would be good for a gasser maybe but for diesel its pretty much useless as a code reader...
Although the Scangauge II isn't very good for reading actual DTC codes, it can be programmed with a DTC PID that does work fairly well. It even picks up "pending" codes.
Looks good so far don't for get VGT at 2500 , something else to look for while safely driving around VGT you don't want anything close to 15 % high or 85% low on the test , if you see this then turbo vanes , unison ring or wheel is headed south! not sure yet but IPR may have a torn screen that will be the other one to test . Trying to cover all bases so bare with me ( I'm old) lol
The VGT is 44 at 2500. I really appreciate you helping sir. My wires on my icp have some white on them. Could it be my ICP? A lot of people are telling me that.
Pull the EBP sensor and check it and the tube to make sure its not plugged. If all is clear then try it with the sensor unplugged. It will go to a default value and run better if the sensor is bad. If neither of the above fix it, pull the Cat and drive it. I have seen 2 recently where the guts have came loose inside the Cat and turned blocking exhaust flow.
at KOEO, EBP/MAP/BARO should all be within 1 or so... it is by his numbers (MAP/EBP)
at idle, MAP/EBP should be up by 3-4psi, BARO should be 14.x and shouldn't change.
Did you check to see that the ICP wires were not shorted or exposed wires touching each other? Even if the ICP is removed, wires touching is still a short.
Have you got a good code reader yet or had AutoZone/Advance Auto read the codes?
Program the scan gauge to read DTC codes, it registers how many are present, just doesn't read the code and see how many are stored. You can get that info from thier website or search it hear...x-gauge programming
then see how many codes are stored. Get the codes read and then start with the first code registered... until then... everybody is guessing, including you.
Did you check to see that the ICP wires were not shorted or exposed wires touching each other? Even if the ICP is removed, wires touching is still a short.
Have you got a good code reader yet or had AutoZone/Advance Auto read the codes?
Program the scan gauge to read DTC codes, it registers how many are present, just doesn't read the code and see how many are stored. You can get that info from thier website or search it hear...x-gauge programming
then see how many codes are stored. Get the codes read and then start with the first code registered... until then... everybody is guessing, including you.
Would autozone or advance be able to diagnose it even if there is no CEL?
not every code turns on the Check Engine Light (CEL), most are stored. Just that the scan gauge doesn't do a good job of reading them... it will register when one happens... why I said, program the scan gauge to read "DTC", its an X-gauge, like FICM or IPR, which you already have one, correct? ... Most times the scan gauge says, no codes found, But the programmed one (DTC) will just tell me how many codes are there, it counts them... it does fine. Mine has two codes stored... then I used another devise to read the codes..
AutoZone/Advance can read the codes, I wouldn't let them diagnose if I had to go the the bathroom, but a good scanner can read the codes you need.