i read in one thread that unpluging the map sensor is pretty much the same as a smoke switch. i unplugged mine and still had the same amount of smoke as i had before. no difference at all. i have more smoke than i think i should have to begin with so do yall think that maybe the map sensor is out or going out. it dont throw the code when it is plugged in but did when unplugged. and if the map sensor is out would that cause the truck to get worse fuel mileage. any info would be helpful. thanks in advance

Eddie

 

With those 150hp sticks, and Airdog mixed with the stock turbo your gonna smoke no matter what you unplug.

This whole MAP sensor smoke switch thing is one of those urban legends that just wont die. In Auto trannied trucks this will always throw codes when you unplug it. In a few trucks it makes an excessive amount of smoke when you unplug it but also kills fuel mileage, bogs the truck down and smokes to the point of being stupid even at idle.

Someplace on here is a guide to checking and testing the MAP Sensor. If you run a search for MAP it should come right up, if you don't find it let me know and I'll hunt it down for you.

 

the 150 injectors havent been put in yet. right now i only have the rv injectors in it. how much do they smoke. and the best mileage ive seen is 16.2.

 

16mpg is about normal. I would call 16-20mpg a normal range depending on driving styles and city or highway.

To describe the amount of smoke each truck should make I would have to start with why each truck smokes cause every truck on the road is different. Smoke is nothing more then having more fuel delivered to the chamber then you have oxygen enough to burn. It's excess fuel being flushed from the system in the form of soot or ash. Wasted fuel. If your already smoking with the RV's you will gain nothing but more smoke with the 150's. The only way to increase power if your already a smoke stack is to find a way to deliver more oxygen through the intake or change the turbo spool up times to provide the additional air.

Smoke generally clears off once your turbo spools up because this makes the fuel burn more efficiently, thus produces less smoke with the same amount of fuel. This Borrowed SMARTY I'm runnin right now makes it hard for me to blow any smoke even with the Comp turned all the way up because the SMARTY spools the turbo up so fast.

All this being said, if there is a problem with the MAP Sensor it could also cause the truck to smoke because the computer is being fed bad info and controlling fuel flow based on that bad info. Although MAP Sensor problems aren't all that common.