Hello and welcome to Just Answer!
Do you know what the P code # XXXXX was it P0299?
Sure no problem, just let me know when you get a chance and I will get back to you asap. I will be gone tomorrow for most of the day, but I will try to get back to you asap!
You can read the codes with the key cycle and odometer and this is how to do that if you didn't know.
Sit in the vehicle with all doors closed and starting with the key in the off position, turn it to ON, OFF, ON, OFF, ON (don't turn the key to the start position just on) within 5 seconds and leave the key on and watch the digital odometer to see if it displays a fault code. It will be a P followed by 4 numbers example P0700. When it is done displaying codes or if there are no codes it will say done. If you can't get this to work, please try it again following the instructions!
The first thing you need to check if you haven't already is the air filter for restriction.
If the air filter looks good, I would like you to visually inspect all the large hoses and clamps from the turbo to the intercooler and from the intercooler to the intake to see if there is a loose clamp, split or loose hose.
This code could be caused by a restricted intake, intake system leak including intercooler, faulty turbo charger, and sensor(which you have replaced).
Check this out and we can go from there!
No- I see the 2 bolts on the rear exhaust manifold are broke off..
The problem happened this winter when snow plugged the air filter when i was pulling a big load, turbo area got very hot.. But when I unplugged the snow fromn the intake and filter and installed a new dry filter the problem did not go away, i canceled the code but it comes back, still low power, smokes when step down on the pedal.
There's a good chance the turbo could have got damaged, but we should start by checking the basics first. It only takes about 20 minutes to pressure check the intake system and if you have no leaks, you should get you boost pressure tested with a scan tool. If you can't build boost and there aren't any leaks, you likely have a failed turbo
I will check the turbo psi on Monday, and see what it is.Will then build something to test psi with.
Hooked up my OBD2 and I see 2 other codes- P0073, P0107--
I thought it read out the turbo psi but i did not see it, unless I missed a line. have not used the scanner on this pickup, had no problems until now. Does it suppose to show the turbo psi on the OBD2 scanner?THANKS,Doug
Missed it--MAP 26 at idle 47 floored going down the road.
Shows 27.1 with the key on(engine NOT running)
When idling it is 26.7Doug
The map sensor should show atmospheric pressure with the key on which is usually around 14 depending on your altitude.
The map/boost sensor is located on top of the intake and behind the intake heaters. You said you replaced this sensor, is that correct?
Yes, it is on the driver side of the valve cover.
Elevation here is 3300' montana
At 3000 feet, the pressure should be around 13 psi.
I'm not sure why it's reading that high, maybe a glitch with your scan tool??
Does your scan tool show the map sensor voltage?
Would it be listed as map voltage? Will check and any other ideas, wastegate??
Engine is stock never done any work on it.
I'm not sure we can trust what your scan tool is showing, your scan tool shouldn't be showing that much pressure in the intake.
I still think we have a low boost problem because the low boost code is setting.
The only other way to check the boost pressure would be to drill and tap a pipe thread into the intake plenum and thread a fitting in so we can check the pressure with a mechanical gauge.
I don't think the wastegate actuator is the problem. The wastegate is electronically controlled and I have never seen one cause this problem.
Without checking the intake actual pressure and pressure testing the intake system, I won't be able to help diagnose this. Can you check this?