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No power!?!


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In my mind no power equals not enough fuel and Air, if there is no smoke and no boost leaks sounds like it's under fueled,  since fuel delivery is mostly electronically controlled on this truck, in my opinion problem lies within VP or ECM. I suppose that could be mechanical problem inside VP, something not letting fuel through. All just speculation of course, maybe try double dose of two stroke in case something seized up in VP.

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Excessive boost will cause limp mode. If you boost is exceeding 19-20 PSI it will trip limp mode without tripping a code. If you do manage to pull hard enough it will trip P0234. I've ran several times with my boost elbow and no boost fooler and it just falls on its face without tripping a code. It relies on the limp mode more so. I would inspect the turbo wastegate. 

 

1 hour ago, Cueballtech said:

Yesterday I cleaned the map sensor,

 

Cleaning the MAP sensor will not fix anything either. 

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Yea it can get stuck reading "0" and the truck is just a pig.  

 

 

I would plan to rpelace the map, as Mike said, typically cleaning doesn't do a whole lot.  But if you are like you will just run it and forget and hope haha.

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Cueball,

 

This is one of the main troubles with the OBD II system and the sensors that report to it.  ALWAYS remember: the computer THINKS the information is TRUE, even if the data makes no sense.   The computer only checks to see if the sensor reports a value that is out of a specified range.  If the computer sees the value in the proper range it makes the ASSUMPTION the information is true.  It does not use logic to relate that information.  (ie,  it does NOT go "hey we are at 90% load and have been for 5 minutes, why has the coolant temperature not changed or going down?) 

 

So a map sensor that reports a value in the normal range and is stuck there, even though it should "know" that the range should have changed with engine load, it says everything is all okiedokey and therefor no CEL or codes are set. 

 

This is why it is so important to let the human brain see the actual values and apply logic to the values.  (now i will get on my horse to say this is why all these points and ranges should be easily found and verified.  The OBD system is not very self diagnostic.) 

 

HTH

 

Hag

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Yet again though it's weird because it was showing on the torque app as no reading.. Not 14.7 which is atmosphere...

That's what had me confused... I'd think if the computer saw no reading from the map sensor it would trip a code.... Like it did when I unplugged it trying to figure this out......

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