Manifold Pressure high logged 3030

sierrafery said:

You insist too much on the gauge reading IMO, all i explained untill now is about the engine management, as long as you keep getting that fault code and those MAP readings that engine will not run well, it will be in the restricted performance mode regardless of what boost you see on the gauge

Click to expand...

Thanks, I will get some live data readings and come back over the coming days and post back. My reference to the boost gauge reading was for two reasons. First to show it has boost and if there is a leak it is only small but secondly the boost has dropped to where you say the limited amount in case of fault is since changing the MAP sensor. I will also switch back to the original MAP sensor to get readings from both original and new one.

Bit of an update and it is worth noting I had another post about indicators/hazards not working and a strange emblem in bottom left of mileometer LCD......no idea if this is all related. I have now got that emblem and no central locking or remote locking! The alarm/imobiliser by the way I had fortunately disabled long ago with EKA key trick when my remote receiver failed and I never re instated it when the receiver was replaced just leaving the locking on remote.
I have not driven it because do not want to get stranded...though it starts and runs well.
I disconnected the battery and checked various wiring, I found the red plug on the ecu by battery has done the wicking oil and one end of the plug was pretty oily. I have cleaned it all out for now but another job needed soon it seems. I hoped this could be the issue.
However, having reconnected battery the high manifold pressure fault logs soon after clearing and restarting.
Running off load in the drive ambient pressure seems to be close to 100kpa. Manifold 220 ish at idle but dropping to circa 100 at about 2000-2500 rpm. Then there is Raw Manifold pressure....I do not know the difference in these readings or what voltage readings are useful for sensors.
However, Raw Manifold Pressure seems to be circa 220 at idle but increases to 260 ish building revs up off load.
Also, when I turn the ignition on and the various idiot lights come on to check I get a beeping I am sure was not there before!
Apologies for the long post....I am frustrated our truck is playing up its a good'n in many other ways!

Russell Marlow said:

Running off load in the drive ambient pressure seems to be close to 100kpa. Manifold 220 ish at idle but dropping to circa 100 at about 2000-2500 rpm.

Click to expand...

IMO it's what i explained in post #18... go back on the harness from the MAP sensor as you can maybe you find a point where it's chafed

Russell Marlow said:

Bit of an update and it is worth noting I had another post about indicators/hazards not working and a strange emblem in bottom left of mileometer LCD......no idea if this is all related.

Click to expand...

That's not related, this was covered in your other dedicated post, if you replaced the fusebox and it's still the same then unfortunately the next suspect is the BCU

thanks, yes I am waiting on a fusebox then that will be done.
I will trace the wiring back from the sensor on the top of the manifold, I am not sure where it gets bundled within the loom but will go as far as I can.
Thanks again.

IIRC there is a point where the engine harness passes beneath the block where it used to get chafed unless oil got into the ECU and messed up that particular input